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Santiago Faci
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New sample: consume API using RetroFit
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‎themealdb/.gitignore‎

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*.iml
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.gradle
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/local.properties
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/.idea/caches
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/.idea/libraries
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/.idea/modules.xml
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/.idea/workspace.xml
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/.idea/navEditor.xml
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/.idea/assetWizardSettings.xml
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx
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local.properties

‎themealdb/app/.gitignore‎

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/build

‎themealdb/app/build.gradle‎

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plugins {
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id 'com.android.application'
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}
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android {
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namespace 'space.harbour.themealdb'
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compileSdk 32
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defaultConfig {
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applicationId "space.harbour.themealdb"
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minSdk 21
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targetSdk 32
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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}
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dependencies {
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// Lombok: Download the plugin zip file, extract it and copy to $android_studio_dir/plugins
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compileOnly "org.projectlombok:lombok:1.18.24"
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annotationProcessor 'org.projectlombok:lombok:1.18.24'
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implementation "androidx.room:room-runtime:2.4.3"
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implementation 'com.squareup.retrofit2:retrofit:2.9.0'
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implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
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implementation 'com.squareup.picasso:picasso:2.8'
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annotationProcessor "androidx.room:room-compiler:2.4.3"
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implementation 'androidx.appcompat:appcompat:1.5.1'
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implementation 'com.google.android.material:material:1.7.0'
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implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
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}

‎themealdb/app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎themealdb/app/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools">
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<uses-permission android:name="android.permission.INTERNET" />
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<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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<application
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android:allowBackup="true"
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android:dataExtractionRules="@xml/data_extraction_rules"
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android:fullBackupContent="@xml/backup_rules"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/Theme.Themealdb"
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tools:targetApi="31">
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<activity
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android:name=".MainActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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<meta-data
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android:name="android.app.lib_name"
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android:value="" />
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</activity>
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</application>
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</manifest>

‎themealdb/app/src/main/java/space/harbour/themealdb/MainActivity.java‎

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package space.harbour.themealdb;
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import android.os.Bundle;
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import android.widget.ArrayAdapter;
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import android.widget.ListView;
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import android.widget.Toast;
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import androidx.appcompat.app.AppCompatActivity;
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import java.util.ArrayList;
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import java.util.List;
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import retrofit2.Call;
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import retrofit2.Callback;
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import retrofit2.Response;
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import space.harbour.themealdb.api.TheMealDbApi;
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import space.harbour.themealdb.api.TheMealDbApiInterface;
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import space.harbour.themealdb.domain.Category;
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import space.harbour.themealdb.domain.CategoryApiList;
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public class MainActivity extends AppCompatActivity {
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ArrayAdapter<Category> categoryAdapter;
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List<Category> categoryList;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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categoryList = new ArrayList<>();
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categoryAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, categoryList);
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ListView listView = findViewById(R.id.categoryList);
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listView.setAdapter(categoryAdapter);
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loadMeals();
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}
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private void loadMeals() {
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TheMealDbApiInterface api = TheMealDbApi.buildInstance();
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Call<CategoryApiList> callProducts = api.getAllCategories();
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callProducts.enqueue(new Callback<CategoryApiList>() {
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@Override
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public void onResponse(Call<CategoryApiList> call, Response<CategoryApiList> response) {
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CategoryApiList categoryApiList = response.body();
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categoryList.addAll(categoryApiList.getCategories());
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categoryAdapter.notifyDataSetChanged();
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}
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@Override
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public void onFailure(Call<CategoryApiList> call, Throwable throwable) {
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Toast.makeText(getApplicationContext(), "An error has occurred", Toast.LENGTH_LONG).show();
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categoryList.clear();
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categoryAdapter.notifyDataSetChanged();
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Toast.makeText(getApplicationContext(), throwable.getMessage(), Toast.LENGTH_LONG).show();
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}
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});
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}
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}

‎themealdb/app/src/main/java/space/harbour/themealdb/api/Constants.java‎

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package space.harbour.themealdb.api;
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public class Constants {
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public final static String BASE_URL = "https://www.themealdb.com/api/json/v1/1/";
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}

‎themealdb/app/src/main/java/space/harbour/themealdb/api/TheMealDbApi.java‎

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package space.harbour.themealdb.api;
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import static space.harbour.themealdb.api.Constants.BASE_URL;
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import retrofit2.Retrofit;
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import retrofit2.converter.gson.GsonConverterFactory;
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public class TheMealDbApi {
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public static TheMealDbApiInterface buildInstance() {
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Retrofit retrofit = new Retrofit.Builder()
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.baseUrl(BASE_URL)
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.addConverterFactory(GsonConverterFactory.create())
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.build();
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return retrofit.create(TheMealDbApiInterface.class);
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}
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}

‎themealdb/app/src/main/java/space/harbour/themealdb/api/TheMealDbApiInterface.java‎

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package space.harbour.themealdb.api;
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import retrofit2.Call;
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import retrofit2.http.GET;
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import retrofit2.http.Query;
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import space.harbour.themealdb.domain.CategoryApiList;
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import space.harbour.themealdb.domain.MealApiList;
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public interface TheMealDbApiInterface {
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@GET("search.php")
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Call<MealApiList> getMealsByName(@Query("s") String name);
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@GET("categories.php")
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Call<CategoryApiList> getAllCategories();
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}

‎themealdb/app/src/main/java/space/harbour/themealdb/domain/Category.java‎

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package space.harbour.themealdb.domain;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import lombok.NoArgsConstructor;
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@Data
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@AllArgsConstructor
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@NoArgsConstructor
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public class Category {
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private int idCategory;
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private String strCategory;
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private String strCategoryDescription;
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@Override
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public String toString() {
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return strCategory;
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}
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}

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