updated to complete

2025-10-28 11:43:15 -04:00
parent 1ee497dd99
commit 88b520d756
60 changed files with 1454 additions and 732 deletions
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,4 +1,5 @@
 {
    "java.configuration.updateBuildConfiguration": "automatic",
-    "java.debug.settings.onBuildFailureProceed": true
+    "java.debug.settings.onBuildFailureProceed": true,
+    "java.dependency.packagePresentation": "hierarchical"
 }
--- a/Api/build.gradle
+++ b/Api/build.gradle
@@ -12,7 +12,7 @@ plugins {
 // Apply a specific Java toolchain to ease working on different environments.
 java {
    toolchain {
-        languageVersion = JavaLanguageVersion.of(24)
+        languageVersion = JavaLanguageVersion.of(25)
    }
 }

@@ -27,15 +27,7 @@ repositories {
 }

 dependencies {
-    
-    implementation 'io.helidon:helidon:4.3.1'
-    implementation 'io.helidon.common:helidon-common:4.3.1'
-    implementation 'io.helidon.media:helidon-media-jsonb:3.2.12'
-    implementation 'io.helidon.media.jsonb:helidon-media-jsonb-common:1.4.16'
-    implementation 'io.helidon.media.jsonb:helidon-media-jsonb-server:1.4.16'
-    implementation 'jakarta.json.bind:jakarta.json.bind-api:3.0.1'
-    
-    implementation 'io.helidon.webserver:helidon-webserver:4.3.1'
-
+    implementation 'jakarta.json.bind:jakarta.json.bind-api:3.0.1'    
+    implementation project(':Model')
 }

--- a/Api/src/main/java/edu/inventorym/Api.java
+++ b/Api/src/main/java/edu/inventorym/Api.java
@@ -1,37 +1,140 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym;

-public class Api {
+import java.time.ZonedDateTime;

-        public static void main(String[] args) {
-            
-        }
+import edu.inventorym.model.Customer;
+import edu.inventorym.model.CustomerManager;
+import edu.inventorym.model.Drawing;
+import edu.inventorym.model.InventoryList;
+import edu.inventorym.model.InventoryManager;
+import edu.inventorym.model.InventoryPiece;
+import edu.inventorym.model.Painting;
+import edu.inventorym.model.Print;
+import edu.inventorym.model.Sculpture;
+import edu.inventorym.model.Transaction;
+import edu.inventorym.model.TransactionList;
+import edu.inventorym.model.TransactionManager;

+public interface Api {

-        void callerInterface(){
-            //@Comment
-            /* 
-            1. Add new art object to the inventory. Your manager must check that the art is not already in the inventory before adding
-            2. Remove art object from the inventory
-            3. Return a list of all art objects from inventory 
+    public static void main(String[] args) {

-            3. Add a new transaction object to the list manager is handling
-            4. Calculate and return transaction price 
-            5. Complete transaction 
-            6. Remove transaction object
+        callerInterface();

-            7. Format and return transaction data in print format
-            
-            8. Retrieve and return transactions based on:
-                • customer email
-                • transaction date
-                • transaction id 
-                • art id
-            9. Update inventory file(s) on local system
+    }

-            10. Update transaction file(s) on local system
-            
-            11. Any other functionality needed to support the above requirements
-            */
-        }
+    static void callerInterface() {
+        // @Comment
+        /*
+         * 1. Add new art object to the inventory. Your manager must check that the art
+         * is not already in the inventory before adding
+         */

+        InventoryManager.getInstance().getArtPieceTypes().forEach(System.out::println);
+
+        /* Add Inventory */
+
+        InventoryManager.getInstance().add(make(new Drawing()));
+        InventoryManager.getInstance().add(make(new Print()));
+        InventoryManager.getInstance().add(make(new Painting()));
+        InventoryManager.getInstance().add(make(new Sculpture()));
+        InventoryManager.getInstance().add(make(new Sculpture()));
+        InventoryManager.getInstance().add(make(new Sculpture()));
+
+        /*
+         * 2. Remove art object from the inventory
+         */
+        InventoryManager imgr = InventoryManager.getInstance();
+        InventoryPiece art = imgr.find("####");
+        imgr.Remove(art);
+        /*
+         * 3. Return a list of all art objects from inventory
+         */
+        CustomerManager cmgr = CustomerManager.getInstance();
+        Customer customer = cmgr.findByEmail("kate@it.com");
+        InventoryList customerCart = new InventoryList();
+
+        TransactionManager tmgr = TransactionManager.getInstance();
+
+        /*
+         * 3. Add a new transaction object to the list manager is handling
+         */
+        Transaction tran = tmgr.TransactRequest(customer, customerCart, new Transaction());
+        /*
+         * 4. Calculate and return transaction price
+         * 5. Complete transaction
+         * 6. Remove transaction object
+         */
+        tmgr.compute(tran);
+        tmgr.complete(tran);
+        tmgr.remove(tran);
+        /*
+         * 7. Format and return transaction data in print format
+         */
+        System.out.println( tran );
+        /*
+         * 8. Retrieve and return transactions based on:
+         * customer email
+         */
+        TransactionList foundTrans = tmgr.findByCustomerEmail(customer.getEmail());
+        /* 
+         * transaction date
+         */
+        foundTrans = tmgr.findByTransactionDate(tran.getCompleted());
+        /*
+         * transaction id
+         */
+        foundTrans = tmgr.findByTransactionId(tran.getId());
+        /*
+         * art id
+         */
+        foundTrans = tmgr.findByTransactionId(tran.getId());
+
+        /* 
+         * 9. Update inventory file(s) on local system
+         */
+        InventoryManager.getInstance().save();
+        /*
+         * 10. Update transaction file(s) on local system
+         */
+        TransactionManager.getInstance().save();
+    }
+
+    static Drawing make(Drawing o) {
+        o.setTitle("Windy Rowing");
+        o.setDescription("East Market Square find. Local Author.");
+        o.setAuthor("Dave Janson");
+        o.setCreated(ZonedDateTime.now());
+        return o;
+    }
+
+    static Painting make(Painting o) {
+        o.setTitle("Windy Rowing");
+        o.setDescription("East Market Square find. Local Author.");
+        o.setAuthor("Dave Janson");
+        o.setCreated(ZonedDateTime.now());
+        return o;
+    }
+
+    static Print make(Print o) {
+        o.setTitle("Windy Rowing");
+        o.setDescription("East Market Square find. Local Author.");
+        o.setAuthor("Dave Janson");
+
+        o.setCreated(ZonedDateTime.now());
+        return o;
+    }
+
+    static Sculpture make(Sculpture o) {
+        o.setTitle("Windy Rowing");
+        o.setDescription("East Market Square find. Local Author.");
+        o.setAuthor("Dave Janson");
+
+        o.setCreated(ZonedDateTime.now());
+        return o;
+    }
 }
--- a/Api/src/main/java/edu/inventorym/model/Customer.java
+++ b/Api/src/main/java/edu/inventorym/model/Customer.java
@@ -1,13 +0,0 @@
-package edu.inventorym.model;
-
-public class Customer {
-
-    String nameFirst;
-    String nameLast;
-    String mailing;
-    String phone;
-    String email;
-
-    public Customer(){}
-
-}
--- a/Api/src/main/java/edu/inventorym/model/CustomerList.java
+++ b/Api/src/main/java/edu/inventorym/model/CustomerList.java
@@ -1,5 +0,0 @@
-package edu.inventorym.model;
-
-public class CustomerList {
-
-}
--- a/Api/src/main/java/edu/inventorym/model/CustomerManager.java
+++ b/Api/src/main/java/edu/inventorym/model/CustomerManager.java
@@ -1,5 +0,0 @@
-package edu.inventorym.model;
-
-public class CustomerManager {
-
-}
--- a/Api/src/main/java/edu/inventorym/model/Drawing.java
+++ b/Api/src/main/java/edu/inventorym/model/Drawing.java
@@ -1,12 +0,0 @@
-package edu.inventorym.model;
-
-public class Drawing extends InventoryPiece {
-
-    public String style;
-    public String technique;
-    public String category;
-
-    public Drawing() {
-        super(InventoryType.DRAWING);
-    }
-}
--- a/Api/src/main/java/edu/inventorym/model/InvalidTransOperationException.java
+++ b/Api/src/main/java/edu/inventorym/model/InvalidTransOperationException.java
@@ -1,17 +0,0 @@
-package edu.inventorym.model;
-
-public class InvalidTransOperationException extends RuntimeException {
-    public InvalidTransOperationException(String message) {
-        super(message);
-    }
-
-    public InvalidTransOperationException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-    public InvalidTransOperationException(Throwable cause) {
-        super(cause);
-    }
-
-
-}
--- a/Api/src/main/java/edu/inventorym/model/InventoryManager.java
+++ b/Api/src/main/java/edu/inventorym/model/InventoryManager.java
@@ -1,25 +0,0 @@
-package edu.inventorym.model;
-
-import java.util.EnumSet;
-import java.util.Set;
-
-public class InventoryManager {
-
-    final static InventoryManager INSTANCE = new InventoryManager();
-
-    public static InventoryManager getInstance() {
-        return INSTANCE;
-    }
-
-    public InventoryList INVENTORY = new InventoryList();
-    public CustomerList CUSTOMERS = new CustomerList();
-    public TransactionList TRANSACTIONS = new TransactionList();
-
-    private InventoryManager() {
-    }   
-
-    public Set<InventoryType>  getArtPieceTypes(){
-        return EnumSet.allOf(InventoryType.class);
-    }
-
-}
--- a/Api/src/main/java/edu/inventorym/model/Painting.java
+++ b/Api/src/main/java/edu/inventorym/model/Painting.java
@@ -1,14 +0,0 @@
-package edu.inventorym.model;
-
-public class Painting extends InventoryPiece {
-    int height;
-    int width;
-    String style;
-    String technique;
-    String category;
-
-    public Painting (){
-        super(InventoryType.PAINTING);
-    }
-
-}
--- a/Api/src/main/java/edu/inventorym/model/Print.java
+++ b/Api/src/main/java/edu/inventorym/model/Print.java
@@ -1,11 +0,0 @@
-package edu.inventorym.model;
-
-public class Print extends InventoryPiece {
-
-    String openEditionType;
-    String category;
-
-    public Print(){
-        super(InventoryType.PRINT); 
-    }
-}
--- a/Api/src/main/java/edu/inventorym/model/Sculpture.java
+++ b/Api/src/main/java/edu/inventorym/model/Sculpture.java
@@ -1,12 +0,0 @@
-package edu.inventorym.model;
-
-public class Sculpture extends InventoryPiece {
-
-    String material;
-    float weight;
-
-    public Sculpture (){
-        super(InventoryType.SCULPTURE);
-    }
-
-}
--- a/Api/src/main/java/edu/inventorym/model/Transaction.java
+++ b/Api/src/main/java/edu/inventorym/model/Transaction.java
@@ -1,8 +0,0 @@
-package edu.inventorym.model;
-
-import java.time.ZonedDateTime;
-
-public class Transaction {
-    ZonedDateTime created = ZonedDateTime.now();
-    ZonedDateTime completed = null;
-}
--- a/Api/src/main/java/edu/inventorym/model/TransactionList.java
+++ b/Api/src/main/java/edu/inventorym/model/TransactionList.java
@@ -1,5 +0,0 @@
-package edu.inventorym.model;
-
-public class TransactionList {
-
-}
--- a/Api/src/main/java/edu/inventorym/model/TransactionManager.java
+++ b/Api/src/main/java/edu/inventorym/model/TransactionManager.java
@@ -1,14 +0,0 @@
-package edu.inventorym.model;
-
-import java.security.SecureRandom;
-import java.util.Base64;
-
-public class TransactionManager {
-
-    final public static String generateTransactionRandomID(int byteLength) {
-        SecureRandom secureRandom = new SecureRandom();
-        byte[] bytes = new byte[byteLength];
-        secureRandom.nextBytes(bytes);
-        return Base64.getUrlEncoder().withoutPadding().encodeToString(bytes);
-    }
-}
--- a/Api/uml/classdiagram.dot
+++ b/Api/uml/classdiagram.dot
@@ -1,79 +0,0 @@
-digraph ClassDiagram {
-    // Graph attributes
-    graph [
-        rankdir="BT",
-        splines=ortho,
-        fontname="Arial"
-    ];
-    node [
-        fontname="Arial",
-        fontsize=10,
-        shape=record,
-        style=filled,
-        fillcolor=lightyellow
-    ];
-    edge [
-        fontname="Arial",
-        fontsize=9
-    ];
-
-    // --- Clusters for Packages ---
-    subgraph cluster_edu_inventorym {
-        label="edu.inventorym";
-        style=filled;
-        color=lightgrey;
-        node [style=filled, color=white];
-
-        Api [
-            label="{class Api|+ main(String[]): void\l+ callerInterface(): void\l}"
-        ];
-
-        App [
-            label="{class App|+ main(String[]): void\l- routing(HttpRouting.Builder): void\l}"
-        ];
-
-        RpcDeserializer [
-            label="{class RpcDeserializer|+ main(String[]): void\l+ mapJsonToObjectList(String, Class<T>): List<T>\l}"
-        ];
-    }
-
-    subgraph cluster_edu_inventorym_model {
-        label="edu.inventorym.model";
-        style=filled;
-        color=lightgrey;
-        node [style=filled, color=white];
-
-        InventoryPiece [
-            // Inferred from RpcDeserializer.java
-            label="{interface\n«InventoryPiece»|+ getId(): int\l}"
-        ];
-
-        Drawing [
-            // Inferred from RpcDeserializer.java
-            label="{class Drawing|+ getId(): int\l}"
-        ];
-    }
-
-
-    // --- Relationships ---
-
-    // Inheritance (Drawing implements InventoryPiece)
-    InventoryPiece -> Drawing [
-        arrowhead=empty,
-        style=dashed,
-        label="implements"
-    ];
-
-    // Associations (Dependencies)
-    RpcDeserializer -> Drawing [
-        arrowhead=vee,
-        style=dashed,
-        label="uses"
-    ];
-
-    RpcDeserializer -> InventoryPiece [
-        arrowhead=vee,
-        style=dashed,
-        label="uses"
-    ];
-}
--- a/App/.vscode/settings.json
+++ b/App/.vscode/settings.json
@@ -1,3 +0,0 @@
-{
-    "java.dependency.packagePresentation": "hierarchical"
-}
--- a/App/build.gradle
+++ b/App/build.gradle
@@ -1,41 +0,0 @@
-/*
- * This file was generated by the Gradle 'init' task.
- *
- */
-
-plugins {
-    // Apply the application plugin to add support for building a CLI application in Java.
-    id 'java'
-    id 'application'
-}
-
-// Apply a specific Java toolchain to ease working on different environments.
-java {
-    toolchain {
-        languageVersion = JavaLanguageVersion.of(24)
-    }
-}
-
-application {
-    // Define the main class for the application.
-    mainClass = 'edu.inventorym.RpcDeserializer'
-}
-
-repositories {
-    // Use Maven Central for resolving dependencies.
-    mavenCentral()
-}
-
-dependencies {
-    
-    implementation 'io.helidon:helidon:4.3.1'
-    implementation 'io.helidon.common:helidon-common:4.3.1'
-    implementation 'io.helidon.media:helidon-media-jsonb:3.2.12'
-    implementation 'io.helidon.media.jsonb:helidon-media-jsonb-common:1.4.16'
-    implementation 'io.helidon.media.jsonb:helidon-media-jsonb-server:1.4.16'
-    implementation 'jakarta.json.bind:jakarta.json.bind-api:3.0.1'
-    
-    implementation 'io.helidon.webserver:helidon-webserver:4.3.1'
-
-}
-
--- a/App/gradlew.bat
+++ b/App/gradlew.bat
@@ -1,94 +0,0 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-@rem SPDX-License-Identifier: Apache-2.0
-@rem
-
-@if "%DEBUG%"=="" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%"=="" set DIRNAME=.
-@rem This is normally unused
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if %ERRORLEVEL% equ 0 goto execute
-
-echo. 1>&2
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
-echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation. 1>&2
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto execute
-
-echo. 1>&2
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
-echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation. 1>&2
-
-goto fail
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=
-
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
-
-:end
-@rem End local scope for the variables with windows NT shell
-if %ERRORLEVEL% equ 0 goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-set EXIT_CODE=%ERRORLEVEL%
-if %EXIT_CODE% equ 0 set EXIT_CODE=1
-if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
-exit /b %EXIT_CODE%
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
--- a/App/src/main/java/edu/inventorym/App.java
+++ b/App/src/main/java/edu/inventorym/App.java
@@ -1,30 +0,0 @@
-/*
- * This source file was generated by the Gradle 'init' task
- */
-package edu.inventorym;
-
-import io.helidon.http.Status;
-
-import io.helidon.webserver.WebServer;
-import io.helidon.webserver.http.HttpRouting;
-
-public class App{
-    public static void main(String[] args) {
-        WebServer.builder()
-            .routing(App::routing)
-            .build()
-            .start();
-    }
-
-    private static void routing(HttpRouting.Builder rules) {
-        rules.get("/hello", (req, res) -> res.send("Hello, World!"))
-             .get("/greet/{name}", (req, res) -> {
-                 String name = req.path().pathParameters().get("name");
-                 res.send("Hello, " + name + "!");
-             })
-             .post("/data", (req, res) -> {
-                 String body = req.content().as(String.class);
-                 res.send("Received: " + body);
-             });
-    }
-}
--- a/App/src/main/java/edu/inventorym/RpcDeserializer.java
+++ b/App/src/main/java/edu/inventorym/RpcDeserializer.java
@@ -1,83 +0,0 @@
-package edu.inventorym;
-
-import java.io.StringReader;
-import java.util.ArrayList;
-import java.util.List;
-
-import edu.inventorym.model.Drawing;
-import edu.inventorym.model.InventoryPiece;
-import jakarta.json.JsonArray;
-
-import jakarta.json.Json;
-import jakarta.json.bind.Jsonb;
-import jakarta.json.bind.JsonbBuilder;
-import jakarta.json.bind.JsonbConfig;
-
-public class RpcDeserializer {
-    public static void main(String[] args) {
-        String jsonResponse = "{\"jsonrpc\":\"2.0\",\"result\":19,\"id\":1}";
-        try{
-        // Deserialize the JSON string to a Java RpcResponse object
-        Jsonb jsonb = JsonbBuilder.create();
-        jsonResponse = jsonb.toJson(new Drawing());
-
-        System.out.println("json string: " + jsonResponse);
-
-
-        InventoryPiece response = jsonb.fromJson(jsonResponse, Drawing.class);
-
-        System.out.println("Result: " + response);
-        System.out.println("ID: " + response.getId());
-
-        }catch(Exception e){
-            e.printStackTrace();
-        }
-
-        List<Drawing> rpcs = new ArrayList<Drawing>();
-
-        try{
-        // Configure pretty-printing and other settings
-        JsonbConfig config = new JsonbConfig()
-                .withFormatting(true); // Enable pretty-printing
-        Jsonb jsonb = JsonbBuilder.create(config);
-
-        // Serialize using the custom configuration
-        String prettyJsonString = jsonb.toJson(new Drawing());
-
-        System.out.println("json string: " + prettyJsonString);
-
-        rpcs.add(new Drawing());
-        }catch(Exception e){
-
-        }
-
-        try {
-        // Create Jsonb and serialize
-        Jsonb jsonb = JsonbBuilder.create();
-        String result = jsonb.toJson(rpcs);
-
-        
-            // Deserialize back
-            rpcs = jsonb.fromJson(result, new ArrayList<Drawing>() {
-            }.getClass().getGenericSuperclass());
-
-        } catch (Exception e) {
-
-        } 
-      
-
-    }
-
-    public static <T> List<T> mapJsonToObjectList(String body, Class<T> baseClass) {
-    try (var reader = Json.createReader(new StringReader(body));
-            Jsonb jsonb = JsonbBuilder.create()){
-        JsonArray jsonArray = reader.readArray();
-
-        return jsonArray.stream()
-                .map(jsonValue -> jsonb.fromJson(jsonValue.toString(), baseClass))
-                .toList();
-    } catch (Exception e) {
-        return (List<T>) new ArrayList<Drawing>();
-    }
-}
-}
--- a/App/src/main/java/edu/inventorym/model/Customer.java
+++ b/App/src/main/java/edu/inventorym/model/Customer.java
@@ -1,13 +0,0 @@
-package edu.inventorym.model;
-
-public class Customer {
-
-    String nameFirst;
-    String nameLast;
-    String mailing;
-    String phone;
-    String email;
-
-    public Customer(){}
-
-}
--- a/App/src/main/java/edu/inventorym/model/CustomerList.java
+++ b/App/src/main/java/edu/inventorym/model/CustomerList.java
@@ -1,5 +0,0 @@
-package edu.inventorym.model;
-
-public class CustomerList {
-
-}
--- a/App/src/main/java/edu/inventorym/model/CustomerManager.java
+++ b/App/src/main/java/edu/inventorym/model/CustomerManager.java
@@ -1,5 +0,0 @@
-package edu.inventorym.model;
-
-public class CustomerManager {
-
-}
--- a/App/src/main/java/edu/inventorym/model/InvalidArtOperationException.java
+++ b/App/src/main/java/edu/inventorym/model/InvalidArtOperationException.java
@@ -1,15 +0,0 @@
-package edu.inventorym.model;
-
-public class InvalidArtOperationException extends RuntimeException {
-    public InvalidArtOperationException(String message) {
-        super(message);
-    }
-
-    public InvalidArtOperationException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-    public InvalidArtOperationException(Throwable cause) {
-        super(cause);
-    }
-}
--- a/App/src/main/java/edu/inventorym/model/InvalidTransactionException.java
+++ b/App/src/main/java/edu/inventorym/model/InvalidTransactionException.java
@@ -1,17 +0,0 @@
-package edu.inventorym.model;
-
-public class InvalidTransactionException extends RuntimeException {
-    public InvalidTransactionException(String message) {
-        super(message);
-    }
-
-    public InvalidTransactionException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-    public InvalidTransactionException(Throwable cause) {
-        super(cause);
-    }
-
-
-}
--- a/App/src/main/java/edu/inventorym/model/InventoryList.java
+++ b/App/src/main/java/edu/inventorym/model/InventoryList.java
@@ -1,9 +0,0 @@
-package edu.inventorym.model;
-
-import java.util.ArrayList;
-
-public class InventoryList extends ArrayList<InventoryPiece> {
-    public InventoryList() {
-        super();
-    }
-}
--- a/App/src/main/java/edu/inventorym/model/InventoryManager.java
+++ b/App/src/main/java/edu/inventorym/model/InventoryManager.java
@@ -1,25 +0,0 @@
-package edu.inventorym.model;
-
-import java.util.EnumSet;
-import java.util.Set;
-
-public class InventoryManager {
-
-    final static InventoryManager INSTANCE = new InventoryManager();
-
-    public static InventoryManager getInstance() {
-        return INSTANCE;
-    }
-
-    public InventoryList INVENTORY = new InventoryList();
-    public CustomerList CUSTOMERS = new CustomerList();
-    public TransactionList TRANSACTIONS = new TransactionList();
-
-    private InventoryManager() {
-    }   
-
-    public Set<InventoryType>  getArtPieceTypes(){
-        return EnumSet.allOf(InventoryType.class);
-    }
-
-}
--- a/App/src/main/java/edu/inventorym/model/InventoryPiece.java
+++ b/App/src/main/java/edu/inventorym/model/InventoryPiece.java
@@ -1,84 +0,0 @@
-package edu.inventorym.model;
-
-import java.time.ZonedDateTime;
-
-public abstract class InventoryPiece {
-    public String Id;
-    public float price;
-    public ZonedDateTime created;
-    public String title;
-
-    /**
-     * max 500 characters
-     */
-    public String description;
-
-    public String Author;
-
-    InventoryType iventoryType;
-
-    public InventoryPiece(InventoryType iventoryType) {
-        this.iventoryType = iventoryType;
-        this.created = ZonedDateTime.now();
-        this.Id = TransactionManager.generateTransactionRandomID(10);   
-    }
-
-    public InventoryPiece() {
-    }
-
-    public Boolean isArt(InventoryPiece piece) {
-        return false;
-    }
-
-    public String getType() {
-        return this.iventoryType.toString();
-    };
-
-    public String getId() {
-        return Id;
-    }
-
-    public void setId(String id) {
-        Id = id;
-    }
-
-    public float getPrice() {
-        return price;
-    }
-
-    public void setPrice(float price) {
-        this.price = price;
-    }
-
-    public ZonedDateTime getCreated() {
-        return created;
-    }
-
-    public void setCreated(ZonedDateTime created) {
-        this.created = created;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public void setDescription(String description) {
-        this.description = description;
-    }
-
-    public String getAuthor() {
-        return Author;
-    }
-
-    public void setAuthor(String author) {
-        Author = author;
-    }
-}
--- a/App/src/main/java/edu/inventorym/model/InventoryType.java
+++ b/App/src/main/java/edu/inventorym/model/InventoryType.java
@@ -1,5 +0,0 @@
-package edu.inventorym.model;
-
-public enum InventoryType {
-    PAINTING, DRAWING, PRINT, SCULPTURE
-}
--- a/App/src/main/java/edu/inventorym/model/Print.java
+++ b/App/src/main/java/edu/inventorym/model/Print.java
@@ -1,11 +0,0 @@
-package edu.inventorym.model;
-
-public class Print extends InventoryPiece {
-
-    String openEditionType;
-    String category;
-
-    public Print(){
-        super(InventoryType.PRINT); 
-    }
-}
--- a/App/src/main/java/edu/inventorym/model/Transaction.java
+++ b/App/src/main/java/edu/inventorym/model/Transaction.java
@@ -1,8 +0,0 @@
-package edu.inventorym.model;
-
-import java.time.ZonedDateTime;
-
-public class Transaction {
-    ZonedDateTime created = ZonedDateTime.now();
-    ZonedDateTime completed = null;
-}
--- a/App/src/main/java/edu/inventorym/model/TransactionList.java
+++ b/App/src/main/java/edu/inventorym/model/TransactionList.java
@@ -1,5 +0,0 @@
-package edu.inventorym.model;
-
-public class TransactionList {
-
-}
--- a/App/src/main/java/edu/inventorym/model/TransactionManager.java
+++ b/App/src/main/java/edu/inventorym/model/TransactionManager.java
@@ -1,14 +0,0 @@
-package edu.inventorym.model;
-
-import java.security.SecureRandom;
-import java.util.Base64;
-
-public class TransactionManager {
-
-    final public static String generateTransactionRandomID(int byteLength) {
-        SecureRandom secureRandom = new SecureRandom();
-        byte[] bytes = new byte[byteLength];
-        secureRandom.nextBytes(bytes);
-        return Base64.getUrlEncoder().withoutPadding().encodeToString(bytes);
-    }
-}
--- a/Model/build.gradle
+++ b/Model/build.gradle
@@ -0,0 +1,39 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ */
+
+plugins {
+
+id 'java-library'
+id 'application'
+
+
+}
+
+// Apply a specific Java toolchain to ease working on different environments.
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(25)
+    }
+}
+
+group = 'edu.inventorym'
+version = '1.0.0'
+
+application {
+    // Define the main class for the application.
+    mainClass = 'edu.inventorym.TransactionManager'
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+dependencies {   
+    implementation 'jakarta.json.bind:jakarta.json.bind-api:3.0.1'
+    implementation 'org.eclipse:yasson:3.0.4'
+
+}
+
--- a/Model/src/main/java/edu/inventorym/model/Address.java
+++ b/Model/src/main/java/edu/inventorym/model/Address.java
@@ -0,0 +1,114 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+public final class Address{
+
+    String street;
+    String city;
+    String state;
+    String zip;
+
+    /** not used 
+     * 
+     */
+
+    public Address() {
+    }
+
+    public Address(String street, String city, String state, String zip) {
+        this.street = street;
+        this.city = city;
+        this.state = state;
+        this.zip = zip;
+    }
+    
+    public String getStreet() {
+        return street;
+    }
+
+    public void setStreet(String street) {
+        this.street = street;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    public String getState() {
+        return state;
+    }
+
+    public void setState(String state) {
+        this.state = state;
+    }
+
+    public String getZip() {
+        return zip;
+    }
+
+    public void setZip(String zip) {
+        this.zip = zip;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((street == null) ? 0 : street.hashCode());
+        result = prime * result + ((city == null) ? 0 : city.hashCode());
+        result = prime * result + ((state == null) ? 0 : state.hashCode());
+        result = prime * result + ((zip == null) ? 0 : zip.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Address other = (Address) obj;
+        if (street == null) {
+            if (other.street != null)
+                return false;
+        } else if (!street.equals(other.street))
+            return false;
+        if (city == null) {
+            if (other.city != null)
+                return false;
+        } else if (!city.equals(other.city))
+            return false;
+        if (state == null) {
+            if (other.state != null)
+                return false;
+        } else if (!state.equals(other.state))
+            return false;
+        if (zip == null) {
+            if (other.zip != null)
+                return false;
+        } else if (!zip.equals(other.zip))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("{ \"Address\":{");
+        sb.append("\"street\": \"" + street + "\",");
+        sb.append("\"city\": \"" + city + "\",");
+        sb.append("\"state\": \"" + state + "\",");
+        sb.append("\"zip\": \"" + zip + "\"");
+        sb.append("}}");
+        return sb.toString();
+    }
+}
--- a/Model/src/main/java/edu/inventorym/model/Customer.java
+++ b/Model/src/main/java/edu/inventorym/model/Customer.java
@@ -0,0 +1,82 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+import java.time.ZonedDateTime;
+
+public class Customer {
+    protected String id;
+    protected ZonedDateTime updated;
+    String phone;
+    Address mailing;
+    String email;
+    String nameFirst;
+    String nameLast;
+
+    public Customer(String nameFirst, String nameLast, String phone, String email) {
+        this.nameFirst = nameFirst;
+        this.nameLast = nameLast;
+        this.phone = phone;
+        this.email = email;
+        this.updated = ZonedDateTime.now();
+    }
+
+    public Customer(){}
+
+    public String getEmail() {
+        return email;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+        this.updated = ZonedDateTime.now();
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+        this.updated = ZonedDateTime.now();
+    }
+
+    public Address getMailing() {
+        return mailing;
+    }
+
+    public void setMailing(Address mailing) {
+        this.mailing = mailing;
+        this.updated = ZonedDateTime.now();
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+        this.updated = ZonedDateTime.now();
+    }
+
+    public String getNameFirst() {
+        return nameFirst;
+    }
+
+    public void setNameFirst(String nameFirst) {
+        this.nameFirst = nameFirst;
+        this.updated = ZonedDateTime.now();
+    }
+
+    public String getNameLast() {
+        return nameLast;
+    }
+
+    public void setNameLast(String nameLast) {
+        this.nameLast = nameLast;
+        this.updated = ZonedDateTime.now();
+    }
+
+}
--- a/Model/src/main/java/edu/inventorym/model/CustomerList.java
+++ b/Model/src/main/java/edu/inventorym/model/CustomerList.java
@@ -0,0 +1,14 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+import java.util.ArrayList;
+
+public class CustomerList extends ArrayList<Customer> {
+    public CustomerList() {
+        super();
+    }
+
+}
--- a/Model/src/main/java/edu/inventorym/model/CustomerManager.java
+++ b/Model/src/main/java/edu/inventorym/model/CustomerManager.java
@@ -0,0 +1,33 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+public class CustomerManager {
+    
+    final static CustomerManager INSTANCE = new CustomerManager();
+
+    public static CustomerManager getInstance() {
+        return INSTANCE;
+    }
+
+    public CustomerList CUSTOMERS = new CustomerList();
+
+    public boolean add(Customer c) throws InvalidRecordDataException{
+        check(c);
+        return CUSTOMERS.add(c);
+    }
+
+    void check(Customer c) throws InvalidRecordDataException{
+
+    }
+
+    public Customer findById(String id){
+        return null;
+    }
+
+    public Customer findByEmail(String email){
+        return null;
+    }
+}
--- a/Model/src/main/java/edu/inventorym/model/DataRepository.java
+++ b/Model/src/main/java/edu/inventorym/model/DataRepository.java
@@ -0,0 +1,134 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.math.BigInteger;
+import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.List;
+
+import jakarta.json.Json;
+import jakarta.json.JsonArray;
+import jakarta.json.bind.Jsonb;
+import jakarta.json.bind.JsonbBuilder;
+import jakarta.json.bind.JsonbConfig;
+
+public class DataRepository {
+    final static DataRepository INSTANCE = new DataRepository();
+
+    public static DataRepository getInstance() {
+        return INSTANCE;
+    }
+
+        final public static String generateRandomID(int byteLength) {
+        SecureRandom secureRandom = new SecureRandom();
+        byte[] bytes = new byte[byteLength];
+        secureRandom.nextBytes(bytes);
+        return Base64.getUrlEncoder().withoutPadding().encodeToString(bytes);
+    }
+
+    final public static String generateRandom10DigitID() {
+        int count = 32;
+        SecureRandom rnd = new SecureRandom();
+        BigInteger randomCountLength = BigInteger.valueOf(1000009000L);
+
+        BigInteger val1 = new BigInteger(count, rnd);
+        BigInteger val2 = randomCountLength.add(val1);
+        return String.format("%010d", val2);
+    }
+    
+    public static void WalkFileSystemTree(final InventoryManager manager) throws IOException {
+    }
+
+    public static void WalkFileSystemTree(final CustomerManager manager) throws IOException {
+    }
+
+    public static void WalkFileSystemTree(final TransactionManager manager) throws IOException {
+    }
+
+    
+    static void serialize_deserialize(){
+        String jsonResponse = "";
+        try{
+        // Deserialize the JSON string to a Java RpcResponse object
+        Jsonb jsonb = JsonbBuilder.create();
+        jsonResponse = jsonb.toJson((InventoryPiece)new Drawing());
+
+        System.out.println("json string: " + jsonResponse);
+
+
+        InventoryPiece response = jsonb.fromJson(jsonResponse, Drawing.class);
+
+        System.out.println("Result: " + response);
+        System.out.println("ID: " + response.getId());
+
+        }catch(Exception e){
+            e.printStackTrace();
+        }
+
+        try{
+        // Configure pretty-printing and other settings
+        JsonbConfig config = new JsonbConfig()
+                .withFormatting(true); // Enable pretty-printing
+        Jsonb jsonb = JsonbBuilder.create(config);
+
+        // Serialize using the custom configuration
+        String prettyJsonString = jsonb.toJson(new Drawing());
+
+        System.out.println("json string: " + prettyJsonString);
+
+        }catch(Exception e){
+            e.printStackTrace();
+        }
+
+        try {
+             List<Drawing> rpcs = new ArrayList<Drawing>();
+              rpcs.add(new Drawing());
+              rpcs.add(new Drawing());
+              rpcs.add(new Drawing());
+
+        // Create Jsonb and serialize
+        Jsonb jsonb = JsonbBuilder.create();
+        String result = jsonb.toJson(rpcs);
+
+        
+            // Deserialize back
+            rpcs = jsonb.fromJson(result, 
+            new ArrayList<Drawing>() {}
+            .getClass()
+            .getGenericSuperclass());
+        
+         System.out.println(  rpcs );
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        } 
+
+    }
+
+    public static <T> List<T> mapJsonToObjectList(String body, Class<T> baseClass) {
+    try (var reader = Json.createReader(new StringReader(body));
+            Jsonb jsonb = JsonbBuilder.create()){
+        JsonArray jsonArray = reader.readArray();
+
+        return jsonArray.stream()
+                .map(jsonValue -> jsonb.fromJson(jsonValue.toString(), baseClass))
+                .toList();
+    } catch (Exception e) {
+        return (List<T>) new ArrayList<Drawing>();
+    }
+    }
+    
+    public final static class getRepositoryConfig {
+        public final static String getPath() {
+            String home = System.getenv("HOME") != null ? System.getenv("HOME")
+                    : System.getenv("HOMEDRIVE") + System.getenv("HOMEPATH");
+            return home.replace('\\', '/') + "/workspace/reservationsystem/src/resources/db";
+        }
+    }
+}
--- a/Model/src/main/java/edu/inventorym/model/Drawing.java
+++ b/Model/src/main/java/edu/inventorym/model/Drawing.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 public class Drawing extends InventoryPiece {
--- a/Model/src/main/java/edu/inventorym/model/InvalidArtOperationException.java
+++ b/Model/src/main/java/edu/inventorym/model/InvalidArtOperationException.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 public class InvalidArtOperationException extends RuntimeException {
--- a/Model/src/main/java/edu/inventorym/model/InvalidRecordDataException.java
+++ b/Model/src/main/java/edu/inventorym/model/InvalidRecordDataException.java
@@ -0,0 +1,22 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+public class InvalidRecordDataException extends RuntimeException {
+    public InvalidRecordDataException(String message) {
+        super(message);
+    }
+
+    public InvalidRecordDataException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public InvalidRecordDataException(Throwable cause) {
+        super(cause);
+    }
+
+}
+
+
--- a/Model/src/main/java/edu/inventorym/model/InvalidTransOperationException.java
+++ b/Model/src/main/java/edu/inventorym/model/InvalidTransOperationException.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 public class InvalidTransOperationException extends RuntimeException {
--- a/Model/src/main/java/edu/inventorym/model/InvalidTransactionException.java
+++ b/Model/src/main/java/edu/inventorym/model/InvalidTransactionException.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 public class InvalidTransactionException extends RuntimeException {
--- a/Model/src/main/java/edu/inventorym/model/InventoryList.java
+++ b/Model/src/main/java/edu/inventorym/model/InventoryList.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 import java.util.ArrayList;
--- a/Model/src/main/java/edu/inventorym/model/InventoryManager.java
+++ b/Model/src/main/java/edu/inventorym/model/InventoryManager.java
@@ -0,0 +1,59 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+import java.io.IOException;
+import java.util.EnumSet;
+import java.util.Set;
+
+public class InventoryManager {
+
+    final static InventoryManager INSTANCE = new InventoryManager();
+
+    public static InventoryManager getInstance() {
+        return INSTANCE;
+    }
+
+    public InventoryList INVENTORY = new InventoryList();
+
+    private InventoryManager() {
+    }
+
+    public Set<InventoryType> getArtPieceTypes() {
+        return EnumSet.allOf(InventoryType.class);
+    }
+
+    public void add(InventoryPiece iPiece) {
+        INVENTORY.add(iPiece);
+    }
+
+    public InventoryPiece find(String id) {
+        return null;
+    }
+
+    public InventoryPiece update(InventoryPiece iPiece) {
+        return iPiece;
+    }
+
+    public void save() {
+    }
+
+    public void loadAll(){
+        try {
+            DataRepository.WalkFileSystemTree(INSTANCE);
+        } catch (IOException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
+    }
+
+    public void Remove(InventoryPiece iPiece) {
+       
+        //int i = find(iPiece);
+        //INVENTORY.remove(i)
+       //*** multiple quantiies of iPiece */
+    };
+
+}
--- a/Model/src/main/java/edu/inventorym/model/InventoryPiece.java
+++ b/Model/src/main/java/edu/inventorym/model/InventoryPiece.java
@@ -1,9 +1,17 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 import java.time.ZonedDateTime;

+import jakarta.json.bind.annotation.JsonbProperty;
+import jakarta.json.bind.annotation.JsonbTransient;
+import jakarta.json.bind.annotation.JsonbDateFormat;
+
 public abstract class InventoryPiece {
-    public String Id;
+    public String id;
    public float price;
    public ZonedDateTime created;
    public String title;
@@ -20,7 +28,7 @@ public abstract class InventoryPiece {
    public InventoryPiece(InventoryType iventoryType) {
        this.iventoryType = iventoryType;
        this.created = ZonedDateTime.now();
-        this.Id = TransactionManager.generateTransactionRandomID(10);   
+        this.id = DataRepository.generateRandom10DigitID();   
    }

    public InventoryPiece() {
@@ -35,11 +43,11 @@ public abstract class InventoryPiece {
    };

    public String getId() {
-        return Id;
+        return id;
    }

    public void setId(String id) {
-        Id = id;
+        this.id = id;
    }

    public float getPrice() {
--- a/Model/src/main/java/edu/inventorym/model/InventoryType.java
+++ b/Model/src/main/java/edu/inventorym/model/InventoryType.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 public enum InventoryType {
--- a/Model/src/main/java/edu/inventorym/model/Painting.java
+++ b/Model/src/main/java/edu/inventorym/model/Painting.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 public class Painting extends InventoryPiece {
--- a/Model/src/main/java/edu/inventorym/model/Print.java
+++ b/Model/src/main/java/edu/inventorym/model/Print.java
@@ -0,0 +1,36 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+public class Print extends InventoryPiece {
+
+    String openEditionType;
+    String category;
+
+    public Print(){
+        super(InventoryType.PRINT); 
+    }
+
+    public Print(String openEditionType, String category) {
+        this.openEditionType = openEditionType;
+        this.category = category;
+    }
+
+    public String getOpenEditionType() {
+        return openEditionType;
+    }
+
+    public void setOpenEditionType(String openEditionType) {
+        this.openEditionType = openEditionType;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+}
--- a/Model/src/main/java/edu/inventorym/model/Sculpture.java
+++ b/Model/src/main/java/edu/inventorym/model/Sculpture.java
@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
 package edu.inventorym.model;

 public class Sculpture extends InventoryPiece {
--- a/Model/src/main/java/edu/inventorym/model/Transaction.java
+++ b/Model/src/main/java/edu/inventorym/model/Transaction.java
@@ -0,0 +1,49 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+import java.time.ZonedDateTime;
+
+import jakarta.json.JsonArray;
+
+public class Transaction {
+    String id;
+    ZonedDateTime created = ZonedDateTime.now();
+    ZonedDateTime completed = null;
+    String customerId;
+    Address shipToAddress;
+    InventoryList customerInventoryList;
+    JsonArray attributes;
+
+    public Transaction() {
+
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public ZonedDateTime getCreated() {
+        return created;
+    }
+
+    public void setCreated(ZonedDateTime created) {
+        this.created = created;
+    }
+
+    public ZonedDateTime getCompleted() {
+        return completed;
+    }
+
+    public void setCompleted(ZonedDateTime completed) {
+        this.completed = completed;
+    }
+
+
+}
--- a/Model/src/main/java/edu/inventorym/model/TransactionList.java
+++ b/Model/src/main/java/edu/inventorym/model/TransactionList.java
@@ -0,0 +1,19 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+import java.util.ArrayList;
+
+public class TransactionList extends ArrayList<Transaction> {
+    public TransactionList() {
+        super();
+    }
+
+    @Override
+    public boolean add(Transaction e) {
+        // TODO Auto-generated method stub
+        return super.add(e);
+    }
+}
--- a/Model/src/main/java/edu/inventorym/model/TransactionManager.java
+++ b/Model/src/main/java/edu/inventorym/model/TransactionManager.java
@@ -0,0 +1,56 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+import java.time.ZonedDateTime;
+
+public class TransactionManager {
+
+    final static TransactionManager INSTANCE = new TransactionManager();
+
+    public static TransactionManager getInstance() {
+        return INSTANCE;
+    }
+
+    public TransactionList TRANSACTIONS = new TransactionList();
+
+    public Transaction TransactRequest(Customer customer, InventoryList iPieces, Transaction transacted) {
+        return transacted;
+    }
+
+    public void compute(Transaction tran, TransactionOperationEnum operation) {
+
+    }
+
+    public void compute(Transaction tran) {
+
+    }
+
+    public void complete(Transaction tran) {
+
+    }
+
+    public TransactionList findByCustomerEmail(String email) {
+        return null;
+    }
+
+    public TransactionList findByTransactionId(String id) {
+        return null;
+    }
+
+    public TransactionList findByTransactionDate(ZonedDateTime completed) {
+        return null;
+    }
+
+    public void remove(Transaction tran) {
+
+    }
+
+    public void save() {
+        // TODO Auto-generated method stub
+        throw new UnsupportedOperationException("Unimplemented method 'save'");
+    }
+
+}
--- a/Model/src/main/java/edu/inventorym/model/TransactionOperationEnum.java
+++ b/Model/src/main/java/edu/inventorym/model/TransactionOperationEnum.java
@@ -0,0 +1,14 @@
+/**
+ * license: GPLv3
+ edu.inventorym
+*/
+package edu.inventorym.model;
+
+public enum TransactionOperationEnum {
+  Completed,
+  Draft,
+  Pricing,
+  Removed,
+  Shipping
+}
+
--- a/README.md
+++ b/README.md
@@ -1,2 +1,8 @@
 # inventorym

+Inheritance: Shows inheritance relationships (Drawing, Painting, Print, Sculpture extending InventoryPiece)
+Associations: Shows composition relationships (Customer has Address, Transaction has Address and InventoryList)
+Enumerations: InventoryType and TransactionOperationEnum
+Exceptions: four application exception classes extend RuntimeException
+Manager Classes: Singleton pattern managers with their collections
+Collections: Custom list classes extending ArrayList
--- a/settings.gradle
+++ b/settings.gradle
@@ -5,5 +5,6 @@ plugins {
 }

 rootProject.name = 'inventorym'
-include('App')
-include('Api')
+include('Model')
+include('Api')
+
--- a/uml/classdiagram.dot
+++ b/uml/classdiagram.dot
@@ -0,0 +1,91 @@
+digraph InventoryManagementSystem {
+    rankdir=TB;
+    node [shape=record, fontname="Arial", fontsize=10];
+    edge [fontname="Arial", fontsize=9];
+
+    // Core Model Classes
+    Address [label="{Address|+ street: String\l+ city: String\l+ state: String\l+ zip: String\l|+ getStreet(): String\l+ setStreet(String): void\l+ getCity(): String\l+ setCity(String): void\l+ getState(): String\l+ setState(String): void\l+ getZip(): String\l+ setZip(String): void\l+ hashCode(): int\l+ equals(Object): boolean\l+ toString(): String\l}"];
+
+    Customer [label="{Customer|# id: String\l# updated: ZonedDateTime\l- phone: String\l- mailing: Address\l- email: String\l- nameFirst: String\l- nameLast: String\l|+ Customer()\l+ Customer(String, String, String, String)\l+ getId(): String\l+ setId(String): void\l+ getPhone(): String\l+ setPhone(String): void\l+ getMailing(): Address\l+ setMailing(Address): void\l+ getEmail(): String\l+ setEmail(String): void\l+ getNameFirst(): String\l+ setNameFirst(String): void\l+ getNameLast(): String\l+ setNameLast(String): void\l}"];
+
+    InventoryPiece [label="{«abstract»\lInventoryPiece|+ id: String\l+ price: float\l+ created: ZonedDateTime\l+ title: String\l+ description: String\l+ Author: String\l- iventoryType: InventoryType\l|+ InventoryPiece()\l+ InventoryPiece(InventoryType)\l+ isArt(InventoryPiece): Boolean\l+ getType(): String\l+ getId(): String\l+ setId(String): void\l+ getPrice(): float\l+ setPrice(float): void\l+ getCreated(): ZonedDateTime\l+ setCreated(ZonedDateTime): void\l+ getTitle(): String\l+ setTitle(String): void\l+ getDescription(): String\l+ setDescription(String): void\l+ getAuthor(): String\l+ setAuthor(String): void\l}"];
+
+    Transaction [label="{Transaction|- id: String\l- created: ZonedDateTime\l- completed: ZonedDateTime\l- customerId: String\l- shipToAddress: Address\l- customerInventoryList: InventoryList\l- attributes: JsonArray\l|+ Transaction()\l+ getId(): String\l+ setId(String): void\l+ getCreated(): ZonedDateTime\l+ setCreated(ZonedDateTime): void\l+ getCompleted(): ZonedDateTime\l+ setCompleted(ZonedDateTime): void\l}"];
+
+    // Inventory Subclasses
+    Drawing [label="{Drawing|+ style: String\l+ technique: String\l+ category: String\l|+ Drawing()\l}"];
+
+    Painting [label="{Painting|- height: int\l- width: int\l- style: String\l- technique: String\l- category: String\l|+ Painting()\l}"];
+
+    Print [label="{Print|- openEditionType: String\l- category: String\l|+ Print()\l+ Print(String, String)\l+ getOpenEditionType(): String\l+ setOpenEditionType(String): void\l+ getCategory(): String\l+ setCategory(String): void\l}"];
+
+    Sculpture [label="{Sculpture|- material: String\l- weight: float\l|+ Sculpture()\l}"];
+
+    // Enums
+    InventoryType [label="{«enumeration»\lInventoryType|PAINTING\lDRAWING\lPRINT\lSCULPTURE\l}"];
+
+    TransactionOperationEnum [label="{«enumeration»\lTransactionOperationEnum|Completed\lDraft\lPricing\lRemoved\lShipping\l}"];
+
+    // Collections
+    CustomerList [label="{CustomerList|+ CustomerList()\l}"];
+    InventoryList [label="{InventoryList|+ InventoryList()\l}"];
+    TransactionList [label="{TransactionList|+ TransactionList()\l+ add(Transaction): boolean\l}"];
+
+    // Managers
+    CustomerManager [label="{CustomerManager|- INSTANCE: CustomerManager\l+ CUSTOMERS: CustomerList\l|+ getInstance(): CustomerManager\l+ add(Customer): boolean\l- check(Customer): void\l+ findById(String): Customer\l+ findByEmail(String): Customer\l}"];
+
+    InventoryManager [label="{InventoryManager|- INSTANCE: InventoryManager\l+ INVENTORY: InventoryList\l|+ getInstance(): InventoryManager\l+ getArtPieceTypes(): Set\l+ add(InventoryPiece): void\l+ find(String): InventoryPiece\l+ update(InventoryPiece): InventoryPiece\l+ save(): void\l+ loadAll(): void\l+ Remove(InventoryPiece): void\l}"];
+
+    TransactionManager [label="{TransactionManager|- INSTANCE: TransactionManager\l+ TRANSACTIONS: TransactionList\l|+ getInstance(): TransactionManager\l+ TransactRequest(Customer, InventoryList, Transaction): Transaction\l+ compute(Transaction, TransactionOperationEnum): void\l+ compute(Transaction): void\l+ complete(Transaction): void\l+ findByCustomerEmail(String): TransactionList\l+ findByTransactionId(String): TransactionList\l+ findByTransactionDate(ZonedDateTime): TransactionList\l+ remove(Transaction): void\l+ save(): void\l}"];
+
+    DataRepository [label="{DataRepository|- INSTANCE: DataRepository\l|+ getInstance(): DataRepository\l+ generateRandomID(int): String\l+ generateRandom10DigitID(): String\l+ WalkFileSystemTree(InventoryManager): void\l+ WalkFileSystemTree(CustomerManager): void\l+ WalkFileSystemTree(TransactionManager): void\l+ mapJsonToObjectList(String, Class): List\l}"];
+
+    // Exceptions
+    InvalidRecordDataException [label="{InvalidRecordDataException|+ InvalidRecordDataException(String)\l+ InvalidRecordDataException(String, Throwable)\l+ InvalidRecordDataException(Throwable)\l}"];
+
+    InvalidArtOperationException [label="{InvalidArtOperationException|+ InvalidArtOperationException(String)\l+ InvalidArtOperationException(String, Throwable)\l+ InvalidArtOperationException(Throwable)\l}"];
+
+    InvalidTransactionException [label="{InvalidTransactionException|+ InvalidTransactionException(String)\l+ InvalidTransactionException(String, Throwable)\l+ InvalidTransactionException(Throwable)\l}"];
+
+    InvalidTransOperationException [label="{InvalidTransOperationException|+ InvalidTransOperationException(String)\l+ InvalidTransOperationException(String, Throwable)\l+ InvalidTransOperationException(Throwable)\l}"];
+
+    // Inheritance relationships
+    Drawing -> InventoryPiece [arrowhead=empty, label="extends"];
+    Painting -> InventoryPiece [arrowhead=empty, label="extends"];
+    Print -> InventoryPiece [arrowhead=empty, label="extends"];
+    Sculpture -> InventoryPiece [arrowhead=empty, label="extends"];
+
+    CustomerList -> "ArrayList<Customer>" [arrowhead=empty, label="extends"];
+    InventoryList -> "ArrayList<InventoryPiece>" [arrowhead=empty, label="extends"];
+    TransactionList -> "ArrayList<Transaction>" [arrowhead=empty, label="extends"];
+
+    InvalidRecordDataException -> RuntimeException [arrowhead=empty, label="extends"];
+    InvalidArtOperationException -> RuntimeException [arrowhead=empty, label="extends"];
+    InvalidTransactionException -> RuntimeException [arrowhead=empty, label="extends"];
+    InvalidTransOperationException -> RuntimeException [arrowhead=empty, label="extends"];
+
+    // Associations
+    Customer -> Address [arrowhead=open, label="mailing"];
+    Transaction -> Address [arrowhead=open, label="shipToAddress"];
+    Transaction -> InventoryList [arrowhead=open, label="customerInventoryList"];
+    
+    CustomerManager -> CustomerList [arrowhead=open, label="CUSTOMERS"];
+    InventoryManager -> InventoryList [arrowhead=open, label="INVENTORY"];
+    TransactionManager -> TransactionList [arrowhead=open, label="TRANSACTIONS"];
+
+    InventoryPiece -> InventoryType [arrowhead=open, label="iventoryType"];
+
+    // Dependencies
+    CustomerManager -> InvalidRecordDataException [style=dashed, arrowhead=open, label="throws"];
+    DataRepository -> InventoryManager [style=dashed, arrowhead=open];
+    DataRepository -> CustomerManager [style=dashed, arrowhead=open];
+    DataRepository -> TransactionManager [style=dashed, arrowhead=open];
+    TransactionManager -> Customer [style=dashed, arrowhead=open];
+    TransactionManager -> TransactionOperationEnum [style=dashed, arrowhead=open];
+
+    // Invisible nodes for layout
+    "ArrayList<Customer>" [shape=plaintext, label=""];
+    "ArrayList<InventoryPiece>" [shape=plaintext, label=""];
+    "ArrayList<Transaction>" [shape=plaintext, label=""];
+    RuntimeException [shape=plaintext, label=""];
+}
--- a/uml/classdiagram.svg
+++ b/uml/classdiagram.svg
@@ -0,0 +1,504 @@
+<?xml version="1.0" standalone="no"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="2236pt" height="1112pt" viewBox="0.00 0.00 2235.82 1112.4">
+<g id="graph0" class="graph" transform="translate(-341.9763189164946,1433.4115071391775) scale(1.7411011265922518)" data-name="InventoryManagementSystem">
+
+<polygon fill="white" stroke="none" points="-4,4 -4,-1108.4 2231.82,-1108.4 2231.82,4 -4,4"/>
+<!-- Address -->
+<g id="node1" class="node" pointer-events="visible" data-name="Address">
+
+<polygon fill="none" stroke="black" points="448.75,-0.5 448.75,-216.5 579.54,-216.5 579.54,-0.5 448.75,-0.5"/>
+<text text-anchor="middle" x="514.14" y="-203.5" font-family="Arial" font-size="10.00">Address</text>
+<polyline fill="none" stroke="black" points="448.75,-196.5 579.54,-196.5"/>
+<text text-anchor="start" x="456.75" y="-183.5" font-family="Arial" font-size="10.00">+ street: String</text>
+<text text-anchor="start" x="456.75" y="-171.5" font-family="Arial" font-size="10.00">+ city: String</text>
+<text text-anchor="start" x="456.75" y="-159.5" font-family="Arial" font-size="10.00">+ state: String</text>
+<text text-anchor="start" x="456.75" y="-147.5" font-family="Arial" font-size="10.00">+ zip: String</text>
+<polyline fill="none" stroke="black" points="448.75,-140.5 579.54,-140.5"/>
+<text text-anchor="start" x="456.75" y="-127.5" font-family="Arial" font-size="10.00">+ getStreet(): String</text>
+<text text-anchor="start" x="456.75" y="-115.5" font-family="Arial" font-size="10.00">+ setStreet(String): void</text>
+<text text-anchor="start" x="456.75" y="-103.5" font-family="Arial" font-size="10.00">+ getCity(): String</text>
+<text text-anchor="start" x="456.75" y="-91.5" font-family="Arial" font-size="10.00">+ setCity(String): void</text>
+<text text-anchor="start" x="456.75" y="-79.5" font-family="Arial" font-size="10.00">+ getState(): String</text>
+<text text-anchor="start" x="456.75" y="-67.5" font-family="Arial" font-size="10.00">+ setState(String): void</text>
+<text text-anchor="start" x="456.75" y="-55.5" font-family="Arial" font-size="10.00">+ getZip(): String</text>
+<text text-anchor="start" x="456.75" y="-43.5" font-family="Arial" font-size="10.00">+ setZip(String): void</text>
+<text text-anchor="start" x="456.75" y="-31.5" font-family="Arial" font-size="10.00">+ hashCode(): int</text>
+<text text-anchor="start" x="456.75" y="-19.5" font-family="Arial" font-size="10.00">+ equals(Object): boolean</text>
+<text text-anchor="start" x="456.75" y="-7.5" font-family="Arial" font-size="10.00">+ toString(): String</text>
+</g>
+<!-- Customer -->
+<g id="node2" class="node" pointer-events="visible" data-name="Customer">
+
+<polygon fill="none" stroke="black" points="316.25,-264.3 316.25,-552.3 512.04,-552.3 512.04,-264.3 316.25,-264.3"/>
+<text text-anchor="middle" x="414.14" y="-539.3" font-family="Arial" font-size="10.00">Customer</text>
+<polyline fill="none" stroke="black" points="316.25,-532.3 512.04,-532.3"/>
+<text text-anchor="start" x="324.25" y="-519.3" font-family="Arial" font-size="10.00"># id: String</text>
+<text text-anchor="start" x="324.25" y="-507.3" font-family="Arial" font-size="10.00"># updated: ZonedDateTime</text>
+<text text-anchor="start" x="324.25" y="-495.3" font-family="Arial" font-size="10.00">- phone: String</text>
+<text text-anchor="start" x="324.25" y="-483.3" font-family="Arial" font-size="10.00">- mailing: Address</text>
+<text text-anchor="start" x="324.25" y="-471.3" font-family="Arial" font-size="10.00">- email: String</text>
+<text text-anchor="start" x="324.25" y="-459.3" font-family="Arial" font-size="10.00">- nameFirst: String</text>
+<text text-anchor="start" x="324.25" y="-447.3" font-family="Arial" font-size="10.00">- nameLast: String</text>
+<polyline fill="none" stroke="black" points="316.25,-440.3 512.04,-440.3"/>
+<text text-anchor="start" x="324.25" y="-427.3" font-family="Arial" font-size="10.00">+ Customer()</text>
+<text text-anchor="start" x="324.25" y="-415.3" font-family="Arial" font-size="10.00">+ Customer(String, String, String, String)</text>
+<text text-anchor="start" x="324.25" y="-403.3" font-family="Arial" font-size="10.00">+ getId(): String</text>
+<text text-anchor="start" x="324.25" y="-391.3" font-family="Arial" font-size="10.00">+ setId(String): void</text>
+<text text-anchor="start" x="324.25" y="-379.3" font-family="Arial" font-size="10.00">+ getPhone(): String</text>
+<text text-anchor="start" x="324.25" y="-367.3" font-family="Arial" font-size="10.00">+ setPhone(String): void</text>
+<text text-anchor="start" x="324.25" y="-355.3" font-family="Arial" font-size="10.00">+ getMailing(): Address</text>
+<text text-anchor="start" x="324.25" y="-343.3" font-family="Arial" font-size="10.00">+ setMailing(Address): void</text>
+<text text-anchor="start" x="324.25" y="-331.3" font-family="Arial" font-size="10.00">+ getEmail(): String</text>
+<text text-anchor="start" x="324.25" y="-319.3" font-family="Arial" font-size="10.00">+ setEmail(String): void</text>
+<text text-anchor="start" x="324.25" y="-307.3" font-family="Arial" font-size="10.00">+ getNameFirst(): String</text>
+<text text-anchor="start" x="324.25" y="-295.3" font-family="Arial" font-size="10.00">+ setNameFirst(String): void</text>
+<text text-anchor="start" x="324.25" y="-283.3" font-family="Arial" font-size="10.00">+ getNameLast(): String</text>
+<text text-anchor="start" x="324.25" y="-271.3" font-family="Arial" font-size="10.00">+ setNameLast(String): void</text>
+</g>
+<!-- Customer&#45;&gt;Address -->
+<g id="edge12" class="edge" data-name="Customer-&gt;Address">
+
+<path fill="none" stroke="black" d="M462.09,-264.51C466.49,-251.41 470.91,-238.26 475.21,-225.44"/>
+<polygon fill="black" stroke="black" points="478.32,-216.18 479.4,-227.09 476.73,-220.92 475.14,-225.66 475.14,-225.66 475.14,-225.66 476.73,-220.92 470.87,-224.23 478.32,-216.18 478.32,-216.18"/>
+<text text-anchor="middle" x="484.4" y="-237.7" font-family="Arial" font-size="9.00">mailing</text>
+</g>
+<!-- InventoryPiece -->
+<g id="node3" class="node" pointer-events="visible" data-name="InventoryPiece">
+
+<polygon fill="none" stroke="black" points="1870.25,-600.1 1870.25,-924.1 2046.04,-924.1 2046.04,-600.1 1870.25,-600.1"/>
+<text text-anchor="start" x="1878.25" y="-911.1" font-family="Arial" font-size="10.00">«abstract»</text>
+<text text-anchor="middle" x="1958.14" y="-899.1" font-family="Arial" font-size="10.00">InventoryPiece</text>
+<polyline fill="none" stroke="black" points="1870.25,-892.1 2046.04,-892.1"/>
+<text text-anchor="start" x="1878.25" y="-879.1" font-family="Arial" font-size="10.00">+ id: String</text>
+<text text-anchor="start" x="1878.25" y="-867.1" font-family="Arial" font-size="10.00">+ price: float</text>
+<text text-anchor="start" x="1878.25" y="-855.1" font-family="Arial" font-size="10.00">+ created: ZonedDateTime</text>
+<text text-anchor="start" x="1878.25" y="-843.1" font-family="Arial" font-size="10.00">+ title: String</text>
+<text text-anchor="start" x="1878.25" y="-831.1" font-family="Arial" font-size="10.00">+ description: String</text>
+<text text-anchor="start" x="1878.25" y="-819.1" font-family="Arial" font-size="10.00">+ Author: String</text>
+<text text-anchor="start" x="1878.25" y="-807.1" font-family="Arial" font-size="10.00">- iventoryType: InventoryType</text>
+<polyline fill="none" stroke="black" points="1870.25,-800.1 2046.04,-800.1"/>
+<text text-anchor="start" x="1878.25" y="-787.1" font-family="Arial" font-size="10.00">+ InventoryPiece()</text>
+<text text-anchor="start" x="1878.25" y="-775.1" font-family="Arial" font-size="10.00">+ InventoryPiece(InventoryType)</text>
+<text text-anchor="start" x="1878.25" y="-763.1" font-family="Arial" font-size="10.00">+ isArt(InventoryPiece): Boolean</text>
+<text text-anchor="start" x="1878.25" y="-751.1" font-family="Arial" font-size="10.00">+ getType(): String</text>
+<text text-anchor="start" x="1878.25" y="-739.1" font-family="Arial" font-size="10.00">+ getId(): String</text>
+<text text-anchor="start" x="1878.25" y="-727.1" font-family="Arial" font-size="10.00">+ setId(String): void</text>
+<text text-anchor="start" x="1878.25" y="-715.1" font-family="Arial" font-size="10.00">+ getPrice(): float</text>
+<text text-anchor="start" x="1878.25" y="-703.1" font-family="Arial" font-size="10.00">+ setPrice(float): void</text>
+<text text-anchor="start" x="1878.25" y="-691.1" font-family="Arial" font-size="10.00">+ getCreated(): ZonedDateTime</text>
+<text text-anchor="start" x="1878.25" y="-679.1" font-family="Arial" font-size="10.00">+ setCreated(ZonedDateTime): void</text>
+<text text-anchor="start" x="1878.25" y="-667.1" font-family="Arial" font-size="10.00">+ getTitle(): String</text>
+<text text-anchor="start" x="1878.25" y="-655.1" font-family="Arial" font-size="10.00">+ setTitle(String): void</text>
+<text text-anchor="start" x="1878.25" y="-643.1" font-family="Arial" font-size="10.00">+ getDescription(): String</text>
+<text text-anchor="start" x="1878.25" y="-631.1" font-family="Arial" font-size="10.00">+ setDescription(String): void</text>
+<text text-anchor="start" x="1878.25" y="-619.1" font-family="Arial" font-size="10.00">+ getAuthor(): String</text>
+<text text-anchor="start" x="1878.25" y="-607.1" font-family="Arial" font-size="10.00">+ setAuthor(String): void</text>
+</g>
+<!-- InventoryType -->
+<g id="node9" class="node" pointer-events="visible" data-name="InventoryType">
+
+<polygon fill="none" stroke="black" points="1916.79,-364.3 1916.79,-452.3 1999.49,-452.3 1999.49,-364.3 1916.79,-364.3"/>
+<text text-anchor="start" x="1924.79" y="-439.3" font-family="Arial" font-size="10.00">«enumeration»</text>
+<text text-anchor="middle" x="1958.14" y="-427.3" font-family="Arial" font-size="10.00">InventoryType</text>
+<polyline fill="none" stroke="black" points="1916.79,-420.3 1999.49,-420.3"/>
+<text text-anchor="start" x="1924.79" y="-407.3" font-family="Arial" font-size="10.00">PAINTING</text>
+<text text-anchor="start" x="1924.79" y="-395.3" font-family="Arial" font-size="10.00">DRAWING</text>
+<text text-anchor="start" x="1924.79" y="-383.3" font-family="Arial" font-size="10.00">PRINT</text>
+<text text-anchor="start" x="1924.79" y="-371.3" font-family="Arial" font-size="10.00">SCULPTURE</text>
+</g>
+<!-- InventoryPiece&#45;&gt;InventoryType -->
+<g id="edge18" class="edge" data-name="InventoryPiece-&gt;InventoryType">
+
+<path fill="none" stroke="black" d="M1958.14,-600.13C1958.14,-550.14 1958.14,-498.53 1958.14,-461.6"/>
+<polygon fill="black" stroke="black" points="1958.14,-452.07 1962.64,-462.07 1958.14,-457.07 1958.14,-462.07 1958.14,-462.07 1958.14,-462.07 1958.14,-457.07 1953.64,-462.07 1958.14,-452.07 1958.14,-452.07"/>
+<text text-anchor="middle" x="1983.9" y="-573.5" font-family="Arial" font-size="9.00">iventoryType</text>
+</g>
+<!-- Transaction -->
+<g id="node4" class="node" pointer-events="visible" data-name="Transaction">
+
+<polygon fill="none" stroke="black" points="436.85,-660.1 436.85,-864.1 625.43,-864.1 625.43,-660.1 436.85,-660.1"/>
+<text text-anchor="middle" x="531.14" y="-851.1" font-family="Arial" font-size="10.00">Transaction</text>
+<polyline fill="none" stroke="black" points="436.85,-844.1 625.43,-844.1"/>
+<text text-anchor="start" x="444.85" y="-831.1" font-family="Arial" font-size="10.00">- id: String</text>
+<text text-anchor="start" x="444.85" y="-819.1" font-family="Arial" font-size="10.00">- created: ZonedDateTime</text>
+<text text-anchor="start" x="444.85" y="-807.1" font-family="Arial" font-size="10.00">- completed: ZonedDateTime</text>
+<text text-anchor="start" x="444.85" y="-795.1" font-family="Arial" font-size="10.00">- customerId: String</text>
+<text text-anchor="start" x="444.85" y="-783.1" font-family="Arial" font-size="10.00">- shipToAddress: Address</text>
+<text text-anchor="start" x="444.85" y="-771.1" font-family="Arial" font-size="10.00">- customerInventoryList: InventoryList</text>
+<text text-anchor="start" x="444.85" y="-759.1" font-family="Arial" font-size="10.00">- attributes: JsonArray</text>
+<polyline fill="none" stroke="black" points="436.85,-752.1 625.43,-752.1"/>
+<text text-anchor="start" x="444.85" y="-739.1" font-family="Arial" font-size="10.00">+ Transaction()</text>
+<text text-anchor="start" x="444.85" y="-727.1" font-family="Arial" font-size="10.00">+ getId(): String</text>
+<text text-anchor="start" x="444.85" y="-715.1" font-family="Arial" font-size="10.00">+ setId(String): void</text>
+<text text-anchor="start" x="444.85" y="-703.1" font-family="Arial" font-size="10.00">+ getCreated(): ZonedDateTime</text>
+<text text-anchor="start" x="444.85" y="-691.1" font-family="Arial" font-size="10.00">+ setCreated(ZonedDateTime): void</text>
+<text text-anchor="start" x="444.85" y="-679.1" font-family="Arial" font-size="10.00">+ getCompleted(): ZonedDateTime</text>
+<text text-anchor="start" x="444.85" y="-667.1" font-family="Arial" font-size="10.00">+ setCompleted(ZonedDateTime): void</text>
+</g>
+<!-- Transaction&#45;&gt;Address -->
+<g id="edge13" class="edge" data-name="Transaction-&gt;Address">
+
+<path fill="none" stroke="black" d="M529.86,-660.12C528.4,-559.63 525.63,-401.03 521.14,-263.8 520.74,-251.52 520.26,-238.69 519.74,-225.91"/>
+<polygon fill="black" stroke="black" points="519.33,-216.15 524.24,-225.95 519.54,-221.14 519.75,-226.14 519.75,-226.14 519.75,-226.14 519.54,-221.14 515.25,-226.33 519.33,-216.15 519.33,-216.15"/>
+<text text-anchor="middle" x="558.16" y="-405.6" font-family="Arial" font-size="9.00">shipToAddress</text>
+</g>
+<!-- InventoryList -->
+<g id="node12" class="node" pointer-events="visible" data-name="InventoryList">
+
+<polygon fill="none" stroke="black" points="655.16,-388.3 655.16,-428.3 743.13,-428.3 743.13,-388.3 655.16,-388.3"/>
+<text text-anchor="middle" x="699.14" y="-415.3" font-family="Arial" font-size="10.00">InventoryList</text>
+<polyline fill="none" stroke="black" points="655.16,-408.3 743.13,-408.3"/>
+<text text-anchor="start" x="663.16" y="-395.3" font-family="Arial" font-size="10.00">+ InventoryList()</text>
+</g>
+<!-- Transaction&#45;&gt;InventoryList -->
+<g id="edge14" class="edge" data-name="Transaction-&gt;InventoryList">
+
+<path fill="none" stroke="black" d="M579.28,-660.29C615.74,-583.96 663.28,-484.4 685.97,-436.88"/>
+<polygon fill="black" stroke="black" points="690.17,-428.09 689.92,-439.06 688.01,-432.61 685.86,-437.12 685.86,-437.12 685.86,-437.12 688.01,-432.61 681.8,-435.18 690.17,-428.09 690.17,-428.09"/>
+<text text-anchor="middle" x="665.16" y="-573.5" font-family="Arial" font-size="9.00">customerInventoryList</text>
+</g>
+<!-- Drawing -->
+<g id="node5" class="node" pointer-events="visible" data-name="Drawing">
+
+<polygon fill="none" stroke="black" points="1715.31,-995.9 1715.31,-1079.9 1814.98,-1079.9 1814.98,-995.9 1715.31,-995.9"/>
+<text text-anchor="middle" x="1765.14" y="-1066.9" font-family="Arial" font-size="10.00">Drawing</text>
+<polyline fill="none" stroke="black" points="1715.31,-1059.9 1814.98,-1059.9"/>
+<text text-anchor="start" x="1723.31" y="-1046.9" font-family="Arial" font-size="10.00">+ style: String</text>
+<text text-anchor="start" x="1723.31" y="-1034.9" font-family="Arial" font-size="10.00">+ technique: String</text>
+<text text-anchor="start" x="1723.31" y="-1022.9" font-family="Arial" font-size="10.00">+ category: String</text>
+<polyline fill="none" stroke="black" points="1715.31,-1015.9 1814.98,-1015.9"/>
+<text text-anchor="start" x="1723.31" y="-1002.9" font-family="Arial" font-size="10.00">+ Drawing()</text>
+</g>
+<!-- Drawing&#45;&gt;InventoryPiece -->
+<g id="edge1" class="edge" data-name="Drawing-&gt;InventoryPiece">
+
+<path fill="none" stroke="black" d="M1794.04,-995.91C1812.79,-969.3 1838.4,-932.97 1863.81,-896.93"/>
+<polygon fill="none" stroke="black" points="1866.49,-899.2 1869.39,-889.01 1860.77,-895.17 1866.49,-899.2"/>
+<text text-anchor="middle" x="1843.9" y="-945.3" font-family="Arial" font-size="9.00">extends</text>
+</g>
+<!-- Painting -->
+<g id="node6" class="node" pointer-events="visible" data-name="Painting">
+
+<polygon fill="none" stroke="black" points="1832.56,-983.9 1832.56,-1091.9 1929.72,-1091.9 1929.72,-983.9 1832.56,-983.9"/>
+<text text-anchor="middle" x="1881.14" y="-1078.9" font-family="Arial" font-size="10.00">Painting</text>
+<polyline fill="none" stroke="black" points="1832.56,-1071.9 1929.72,-1071.9"/>
+<text text-anchor="start" x="1840.56" y="-1058.9" font-family="Arial" font-size="10.00">- height: int</text>
+<text text-anchor="start" x="1840.56" y="-1046.9" font-family="Arial" font-size="10.00">- width: int</text>
+<text text-anchor="start" x="1840.56" y="-1034.9" font-family="Arial" font-size="10.00">- style: String</text>
+<text text-anchor="start" x="1840.56" y="-1022.9" font-family="Arial" font-size="10.00">- technique: String</text>
+<text text-anchor="start" x="1840.56" y="-1010.9" font-family="Arial" font-size="10.00">- category: String</text>
+<polyline fill="none" stroke="black" points="1832.56,-1003.9 1929.72,-1003.9"/>
+<text text-anchor="start" x="1840.56" y="-990.9" font-family="Arial" font-size="10.00">+ Painting()</text>
+</g>
+<!-- Painting&#45;&gt;InventoryPiece -->
+<g id="edge2" class="edge" data-name="Painting-&gt;InventoryPiece">
+
+<path fill="none" stroke="black" d="M1895.99,-984.11C1900.11,-969.44 1904.83,-952.66 1909.78,-935.06"/>
+<polygon fill="none" stroke="black" points="1913.14,-936.03 1912.48,-925.46 1906.41,-934.14 1913.14,-936.03"/>
+<text text-anchor="middle" x="1921.9" y="-945.3" font-family="Arial" font-size="9.00">extends</text>
+</g>
+<!-- Print -->
+<g id="node7" class="node" pointer-events="visible" data-name="Print">
+
+<polygon fill="none" stroke="black" points="1948.19,-971.9 1948.19,-1103.9 2120.1,-1103.9 2120.1,-971.9 1948.19,-971.9"/>
+<text text-anchor="middle" x="2034.14" y="-1090.9" font-family="Arial" font-size="10.00">Print</text>
+<polyline fill="none" stroke="black" points="1948.19,-1083.9 2120.1,-1083.9"/>
+<text text-anchor="start" x="1956.19" y="-1070.9" font-family="Arial" font-size="10.00">- openEditionType: String</text>
+<text text-anchor="start" x="1956.19" y="-1058.9" font-family="Arial" font-size="10.00">- category: String</text>
+<polyline fill="none" stroke="black" points="1948.19,-1051.9 2120.1,-1051.9"/>
+<text text-anchor="start" x="1956.19" y="-1038.9" font-family="Arial" font-size="10.00">+ Print()</text>
+<text text-anchor="start" x="1956.19" y="-1026.9" font-family="Arial" font-size="10.00">+ Print(String, String)</text>
+<text text-anchor="start" x="1956.19" y="-1014.9" font-family="Arial" font-size="10.00">+ getOpenEditionType(): String</text>
+<text text-anchor="start" x="1956.19" y="-1002.9" font-family="Arial" font-size="10.00">+ setOpenEditionType(String): void</text>
+<text text-anchor="start" x="1956.19" y="-990.9" font-family="Arial" font-size="10.00">+ getCategory(): String</text>
+<text text-anchor="start" x="1956.19" y="-978.9" font-family="Arial" font-size="10.00">+ setCategory(String): void</text>
+</g>
+<!-- Print&#45;&gt;InventoryPiece -->
+<g id="edge3" class="edge" data-name="Print-&gt;InventoryPiece">
+
+<path fill="none" stroke="black" d="M2016.13,-972.01C2012.93,-960.46 2009.45,-947.95 2005.86,-935"/>
+<polygon fill="none" stroke="black" points="2009.26,-934.18 2003.21,-925.48 2002.52,-936.05 2009.26,-934.18"/>
+<text text-anchor="middle" x="2025.9" y="-945.3" font-family="Arial" font-size="9.00">extends</text>
+</g>
+<!-- Sculpture -->
+<g id="node8" class="node" pointer-events="visible" data-name="Sculpture">
+
+<polygon fill="none" stroke="black" points="2138.47,-1001.9 2138.47,-1073.9 2227.82,-1073.9 2227.82,-1001.9 2138.47,-1001.9"/>
+<text text-anchor="middle" x="2183.14" y="-1060.9" font-family="Arial" font-size="10.00">Sculpture</text>
+<polyline fill="none" stroke="black" points="2138.47,-1053.9 2227.82,-1053.9"/>
+<text text-anchor="start" x="2146.47" y="-1040.9" font-family="Arial" font-size="10.00">- material: String</text>
+<text text-anchor="start" x="2146.47" y="-1028.9" font-family="Arial" font-size="10.00">- weight: float</text>
+<polyline fill="none" stroke="black" points="2138.47,-1021.9 2227.82,-1021.9"/>
+<text text-anchor="start" x="2146.47" y="-1008.9" font-family="Arial" font-size="10.00">+ Sculpture()</text>
+</g>
+<!-- Sculpture&#45;&gt;InventoryPiece -->
+<g id="edge4" class="edge" data-name="Sculpture-&gt;InventoryPiece">
+
+<path fill="none" stroke="black" d="M2154.42,-1001.94C2128.76,-970.72 2089.69,-923.18 2053.15,-878.71"/>
+<polygon fill="none" stroke="black" points="2055.89,-876.54 2046.84,-871.04 2050.49,-880.98 2055.89,-876.54"/>
+<text text-anchor="middle" x="2126.9" y="-945.3" font-family="Arial" font-size="9.00">extends</text>
+</g>
+<!-- TransactionOperationEnum -->
+<g id="node10" class="node" pointer-events="visible" data-name="TransactionOperationEnum">
+
+<polygon fill="none" stroke="black" points="0,-358.3 0,-458.3 138.29,-458.3 138.29,-358.3 0,-358.3"/>
+<text text-anchor="start" x="8" y="-445.3" font-family="Arial" font-size="10.00">«enumeration»</text>
+<text text-anchor="middle" x="69.14" y="-433.3" font-family="Arial" font-size="10.00">TransactionOperationEnum</text>
+<polyline fill="none" stroke="black" points="0,-426.3 138.29,-426.3"/>
+<text text-anchor="start" x="8" y="-413.3" font-family="Arial" font-size="10.00">Completed</text>
+<text text-anchor="start" x="8" y="-401.3" font-family="Arial" font-size="10.00">Draft</text>
+<text text-anchor="start" x="8" y="-389.3" font-family="Arial" font-size="10.00">Pricing</text>
+<text text-anchor="start" x="8" y="-377.3" font-family="Arial" font-size="10.00">Removed</text>
+<text text-anchor="start" x="8" y="-365.3" font-family="Arial" font-size="10.00">Shipping</text>
+</g>
+<!-- CustomerList -->
+<g id="node11" class="node" pointer-events="visible" data-name="CustomerList">
+
+<polygon fill="none" stroke="black" points="776.05,-388.3 776.05,-428.3 866.23,-428.3 866.23,-388.3 776.05,-388.3"/>
+<text text-anchor="middle" x="821.14" y="-415.3" font-family="Arial" font-size="10.00">CustomerList</text>
+<polyline fill="none" stroke="black" points="776.05,-408.3 866.23,-408.3"/>
+<text text-anchor="start" x="784.05" y="-395.3" font-family="Arial" font-size="10.00">+ CustomerList()</text>
+</g>
+<!-- ArrayList&lt;Customer&gt; -->
+<g id="node22" class="node" pointer-events="visible" data-name="ArrayList&lt;Customer&gt;">
+
+</g>
+<!-- CustomerList&#45;&gt;ArrayList&lt;Customer&gt; -->
+<g id="edge5" class="edge" data-name="CustomerList-&gt;ArrayList&lt;Customer&gt;">
+
+<path fill="none" stroke="black" d="M821.14,-388.67C821.14,-338.04 821.14,-197.69 821.14,-137.5"/>
+<polygon fill="none" stroke="black" points="824.64,-137.77 821.14,-127.77 817.64,-137.77 824.64,-137.77"/>
+<text text-anchor="middle" x="836.9" y="-237.7" font-family="Arial" font-size="9.00">extends</text>
+</g>
+<!-- ArrayList&lt;InventoryPiece&gt; -->
+<g id="node23" class="node" pointer-events="visible" data-name="ArrayList&lt;InventoryPiece&gt;">
+
+</g>
+<!-- InventoryList&#45;&gt;ArrayList&lt;InventoryPiece&gt; -->
+<g id="edge6" class="edge" data-name="InventoryList-&gt;ArrayList&lt;InventoryPiece&gt;">
+
+<path fill="none" stroke="black" d="M699.14,-388.67C699.14,-338.04 699.14,-197.69 699.14,-137.5"/>
+<polygon fill="none" stroke="black" points="702.64,-137.77 699.14,-127.77 695.64,-137.77 702.64,-137.77"/>
+<text text-anchor="middle" x="714.9" y="-237.7" font-family="Arial" font-size="9.00">extends</text>
+</g>
+<!-- TransactionList -->
+<g id="node13" class="node" pointer-events="visible" data-name="TransactionList">
+
+<polygon fill="none" stroke="black" points="156.46,-382.3 156.46,-434.3 297.82,-434.3 297.82,-382.3 156.46,-382.3"/>
+<text text-anchor="middle" x="227.14" y="-421.3" font-family="Arial" font-size="10.00">TransactionList</text>
+<polyline fill="none" stroke="black" points="156.46,-414.3 297.82,-414.3"/>
+<text text-anchor="start" x="164.46" y="-401.3" font-family="Arial" font-size="10.00">+ TransactionList()</text>
+<text text-anchor="start" x="164.46" y="-389.3" font-family="Arial" font-size="10.00">+ add(Transaction): boolean</text>
+</g>
+<!-- ArrayList&lt;Transaction&gt; -->
+<g id="node24" class="node" pointer-events="visible" data-name="ArrayList&lt;Transaction&gt;">
+
+</g>
+<!-- TransactionList&#45;&gt;ArrayList&lt;Transaction&gt; -->
+<g id="edge7" class="edge" data-name="TransactionList-&gt;ArrayList&lt;Transaction&gt;">
+
+<path fill="none" stroke="black" d="M227.14,-382.42C227.14,-327.35 227.14,-195.43 227.14,-137.54"/>
+<polygon fill="none" stroke="black" points="230.64,-137.88 227.14,-127.88 223.64,-137.88 230.64,-137.88"/>
+<text text-anchor="middle" x="242.9" y="-237.7" font-family="Arial" font-size="9.00">extends</text>
+</g>
+<!-- CustomerManager -->
+<g id="node14" class="node" pointer-events="visible" data-name="CustomerManager">
+
+<polygon fill="none" stroke="black" points="861.47,-702.1 861.47,-822.1 1032.82,-822.1 1032.82,-702.1 861.47,-702.1"/>
+<text text-anchor="middle" x="947.14" y="-809.1" font-family="Arial" font-size="10.00">CustomerManager</text>
+<polyline fill="none" stroke="black" points="861.47,-802.1 1032.82,-802.1"/>
+<text text-anchor="start" x="869.47" y="-789.1" font-family="Arial" font-size="10.00">- INSTANCE: CustomerManager</text>
+<text text-anchor="start" x="869.47" y="-777.1" font-family="Arial" font-size="10.00">+ CUSTOMERS: CustomerList</text>
+<polyline fill="none" stroke="black" points="861.47,-770.1 1032.82,-770.1"/>
+<text text-anchor="start" x="869.47" y="-757.1" font-family="Arial" font-size="10.00">+ getInstance(): CustomerManager</text>
+<text text-anchor="start" x="869.47" y="-745.1" font-family="Arial" font-size="10.00">+ add(Customer): boolean</text>
+<text text-anchor="start" x="869.47" y="-733.1" font-family="Arial" font-size="10.00">- check(Customer): void</text>
+<text text-anchor="start" x="869.47" y="-721.1" font-family="Arial" font-size="10.00">+ findById(String): Customer</text>
+<text text-anchor="start" x="869.47" y="-709.1" font-family="Arial" font-size="10.00">+ findByEmail(String): Customer</text>
+</g>
+<!-- CustomerManager&#45;&gt;CustomerList -->
+<g id="edge15" class="edge" data-name="CustomerManager-&gt;CustomerList">
+
+<path fill="none" stroke="black" d="M926.05,-702.22C898.57,-625.48 851.61,-494.37 831.16,-437.26"/>
+<polygon fill="black" stroke="black" points="827.88,-428.12 835.49,-436.01 829.57,-432.82 831.25,-437.53 831.25,-437.53 831.25,-437.53 829.57,-432.82 827.02,-439.05 827.88,-428.12 827.88,-428.12"/>
+<text text-anchor="middle" x="909.89" y="-573.5" font-family="Arial" font-size="9.00">CUSTOMERS</text>
+</g>
+<!-- InvalidRecordDataException -->
+<g id="node18" class="node" pointer-events="visible" data-name="InvalidRecordDataException">
+
+<polygon fill="none" stroke="black" points="1406.23,-376.3 1406.23,-440.3 1642.06,-440.3 1642.06,-376.3 1406.23,-376.3"/>
+<text text-anchor="middle" x="1524.14" y="-427.3" font-family="Arial" font-size="10.00">InvalidRecordDataException</text>
+<polyline fill="none" stroke="black" points="1406.23,-420.3 1642.06,-420.3"/>
+<text text-anchor="start" x="1414.23" y="-407.3" font-family="Arial" font-size="10.00">+ InvalidRecordDataException(String)</text>
+<text text-anchor="start" x="1414.23" y="-395.3" font-family="Arial" font-size="10.00">+ InvalidRecordDataException(String, Throwable)</text>
+<text text-anchor="start" x="1414.23" y="-383.3" font-family="Arial" font-size="10.00">+ InvalidRecordDataException(Throwable)</text>
+</g>
+<!-- CustomerManager&#45;&gt;InvalidRecordDataException -->
+<g id="edge19" class="edge" data-name="CustomerManager-&gt;InvalidRecordDataException">
+
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+<!-- DataRepository&#45;&gt;CustomerManager -->
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+<!-- RuntimeException -->
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+<!-- InvalidRecordDataException&#45;&gt;RuntimeException -->
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