Решение модуля "Основы фреймворка Spring"

pom.xml

@@ -12,4 +12,36 @@
 		<maven.compiler.target>1.8</maven.compiler.target>
 	</properties>
 
+	<dependencies>
+		<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-context</artifactId>
+			<version>5.2.1.RELEASE</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-test</artifactId>
+			<version>5.2.1.RELEASE</version>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.13</version>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+		<groupId>org.hamcrest</groupId>
+		<artifactId>hamcrest-all</artifactId>
+		<version>1.3</version>
+		<scope>test</scope>
+
+	</dependency>
+
+	</dependencies>
+
 </project>

src/main/java/com/epam/edu/spring/core/template/SpringCoreTemplate.java

@@ -1,9 +1,30 @@
 package com.epam.edu.spring.core.template;
 
+import com.epam.edu.spring.core.template.configuration.MainConfiguration;
+import com.epam.edu.spring.core.template.entity.Color;
+import com.epam.edu.spring.core.template.entity.Item;
+import com.epam.edu.spring.core.template.repository.ItemRepository;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
 public class SpringCoreTemplate {
 
-	public static void main(String[] args) {
+    public static void main(String[] args) {
+        ApplicationContext context =
+                new AnnotationConfigApplicationContext(MainConfiguration.class);
+
+        ItemRepository itemService = context.getBean("itemRepository", ItemRepository.class);
+
+        Item item1 = new Item(1, "Car", 100, context.getBean("colorFactory", Color.class));
+        Item item2 = new Item(2, "Bus", 200, context.getBean("colorFactory", Color.class));
+        Item item3 = new Item(3, "Airplane", 2000, context.getBean("colorFactory", Color.class));
 
-	}
+        itemService.createItem(item1);
+        itemService.createItem(item2);
+        itemService.createItem(item3);
 
+        System.out.println(itemService.getById(1) + " initialSequence: " + itemService.getInitialSequence());
+        System.out.println(itemService.getById(2) + " initialSequence: " + itemService.getInitialSequence());
+        System.out.println(itemService.getById(3) + " initialSequence: " + itemService.getInitialSequence());
+    }
 }

src/main/java/com/epam/edu/spring/core/template/configuration/InitializerConfiguration.java

@@ -1,4 +1,22 @@
 package com.epam.edu.spring.core.template.configuration;
 
+import com.epam.edu.spring.core.template.entity.Color;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.context.annotation.Scope;
+
+import java.util.Random;
+
+@Configuration
 public class InitializerConfiguration {
+
+    @Bean
+    @Scope("prototype")
+    @Lazy
+    public Color colorFactory() {
+        return Color.values()[new Random().nextInt(Color.values().length)];
+    }
+
+
 }

src/main/java/com/epam/edu/spring/core/template/configuration/MainConfiguration.java

@@ -1,4 +1,10 @@
 package com.epam.edu.spring.core.template.configuration;
 
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Configuration
+@Import({InitializerConfiguration.class, RepositoryConfiguration.class})
 public class MainConfiguration {
+
 }

src/main/java/com/epam/edu/spring/core/template/configuration/RepositoryConfiguration.java

@@ -1,4 +1,36 @@
 package com.epam.edu.spring.core.template.configuration;
 
+import com.epam.edu.spring.core.template.repository.ArrayListItemRepository;
+import com.epam.edu.spring.core.template.repository.ItemRepository;
+import com.epam.edu.spring.core.template.repository.LinkedListItemRepository;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+@Configuration
+@PropertySource("classpath:application.properties")
 public class RepositoryConfiguration {
+
+    @Value("${item.repository.implementation}")
+    String itemRepositoryImplementationType;
+
+    @Bean
+    public ArrayListItemRepository arrayListItemRepository() {
+        return new ArrayListItemRepository();
+    }
+
+    @Bean
+    public LinkedListItemRepository linkedListItemRepository() {
+        return new LinkedListItemRepository();
+    }
+
+    @Bean
+    public ItemRepository itemRepository() {
+        if (itemRepositoryImplementationType.equals("linked")) {
+            return linkedListItemRepository();
+        } else {
+            return arrayListItemRepository();
+        }
+    }
 }

src/main/java/com/epam/edu/spring/core/template/entity/Color.java

@@ -1,5 +1,5 @@
 package com.epam.edu.spring.core.template.entity;
 
 public enum Color {
-
+    Red, Orange, Green, Blue, Indigo, Violet
 }

src/main/java/com/epam/edu/spring/core/template/entity/Item.java

@@ -45,4 +45,14 @@ public Color getColor() {
     public void setColor(Color color) {
         this.color = color;
     }
+
+    @Override
+    public String toString() {
+        return "Item{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", price=" + price +
+                ", color=" + color +
+                '}';
+    }
 }

src/main/java/com/epam/edu/spring/core/template/repository/AbstractRepository.java

@@ -5,6 +5,7 @@
 /**
  * Абстрактный класс для хранения сущностей.
  * ID сущности генерируется, исходя из initialSequence
+ *
  * @param <T>
  */
 public abstract class AbstractRepository<T> {

src/main/java/com/epam/edu/spring/core/template/repository/ArrayListItemRepository.java

@@ -1,28 +1,48 @@
 package com.epam.edu.spring.core.template.repository;
 
 import com.epam.edu.spring.core.template.entity.Item;
+import org.springframework.beans.factory.annotation.Value;
+
+import java.util.ArrayList;
 
 /**
  * Репозиторий, основанный на классе ArrayList.
  * initialSequence должен браться из application.properties
  */
 public class ArrayListItemRepository extends AbstractRepository<Item> implements ItemRepository {
 
+    private final ArrayList<Item> itemArrayList = new ArrayList<>();
+
+    @Value("${initial.sequence}")
+    private long initialSequence = super.initialSequence;
+
+
     @Override
     public Item getById(long id) {
+        for (Item item : itemArrayList) {
+            if (item.getId() == id) {
+                return item;
+            }
+        }
         return null;
     }
 
     @Override
     public boolean createItem(Item item) {
-        return false;
+        return itemArrayList.add(item);
     }
 
+
     void setInitialSequence(int val) {
-        //TODO
+        this.initialSequence = val;
     }
 
     void setHolder() {
-        //TODO
+        holder = itemArrayList;
+    }
+
+    public long getInitialSequence() {
+        return initialSequence;
     }
+
 }

src/main/java/com/epam/edu/spring/core/template/repository/ItemRepository.java

@@ -8,4 +8,6 @@ public interface ItemRepository {
 
     boolean createItem(Item item);
 
+    long getInitialSequence();
+
 }

src/main/java/com/epam/edu/spring/core/template/repository/LinkedListItemRepository.java

@@ -2,27 +2,43 @@
 
 import com.epam.edu.spring.core.template.entity.Item;
 
+import java.util.LinkedList;
+import java.util.Random;
+
 /**
  * Репозиторий, основанный на классе LinkedList.
  * initialSequence должен случайно генерироваться из диапазона от 1 до 100
  */
 public class LinkedListItemRepository extends AbstractRepository<Item> implements ItemRepository {
 
+    private final LinkedList<Item> itemLinkedList = new LinkedList<>();
+
+    private long initialSequence = new Random().nextLong();
+
     @Override
     public Item getById(long id) {
+        for (Item item : itemLinkedList) {
+            if (item.getId() == id) {
+                return item;
+            }
+        }
         return null;
     }
 
     @Override
     public boolean createItem(Item item) {
-        return false;
+        return itemLinkedList.add(item);
     }
 
     void setInitialSequence(int val) {
-        //TODO
+        initialSequence = val;
     }
 
     void setHolder() {
-        //TODO
+        holder = this.itemLinkedList;
+    }
+
+    public long getInitialSequence() {
+        return initialSequence;
     }
 }

src/main/java/com/epam/edu/spring/core/template/service/SimpleItemService.java

@@ -6,16 +6,30 @@
 
 public class SimpleItemService implements ItemService {
 
+
     private ItemRepository itemRepository;
     private ItemValidator itemValidator;
 
+    public SimpleItemService(ItemRepository itemRepository, ItemValidator itemValidator) {
+        this.itemRepository = itemRepository;
+        this.itemValidator = itemValidator;
+    }
+
+    public void setItemRepository(ItemRepository itemRepository) {
+        this.itemRepository = itemRepository;
+    }
+
+    public void setItemValidator(ItemValidator itemValidator) {
+        this.itemValidator = itemValidator;
+    }
+
     @Override
     public Item getById(long id) {
-        return null;
+        return itemRepository.getById(id);
     }
 
     @Override
     public boolean createItem(Item item) {
-        return false;
+        return itemValidator.isItemValid(item) && itemRepository.createItem(item);
     }
 }

src/main/java/com/epam/edu/spring/core/template/validator/SimpleItemValidator.java

@@ -6,6 +6,6 @@ public class SimpleItemValidator implements ItemValidator {
 
     @Override
     public boolean isItemValid(Item item) {
-        return false;
+        return item != null;
     }
 }

src/main/resources/application.properties

@@ -1,2 +1,2 @@
 initial.sequence=42
-item.repository.implementation=
+item.repository.implementation=linked