#84 Work on cake baking

layers/src/main/java/com/iluwatar/layers/App.java

@@ -1,16 +1,27 @@
 package com.iluwatar.layers;
 
+import java.util.Arrays;
+
 public class App {
 	
 	public static void main(String[] args) {
 
 		CakeBakingService service = new CakeBakingServiceImpl();
-		service.saveNewLayer(new CakeLayerInfo("foo", 1));
+		service.saveNewLayer(new CakeLayerInfo("chocolate", 1200));
-		service.saveNewLayer(new CakeLayerInfo("bar", 2));
+		service.saveNewLayer(new CakeLayerInfo("banana", 900));
+		service.saveNewLayer(new CakeLayerInfo("strawberry", 950));
 		service.getAllLayers().stream().forEach((layer) -> System.out.println(layer));
 		
-		service.saveNewTopping(new CakeToppingInfo("hoi", 11));
+		service.saveNewTopping(new CakeToppingInfo("candies", 350));
 		service.getAllToppings().stream().forEach((topping) -> System.out.println(topping));
 
+		CakeInfo cakeInfo = new CakeInfo(new CakeToppingInfo("candies", 0),
+				Arrays.asList(new CakeLayerInfo("chocolate", 0), new CakeLayerInfo("chocolate", 0),
+						new CakeLayerInfo("chocolate", 0)));
+		try {
+			service.bakeNewCake(cakeInfo);
+		} catch (CakeBakingException e) {
+			e.printStackTrace();
+		}
 	}
 }

layers/src/main/java/com/iluwatar/layers/Cake.java

@@ -3,6 +3,7 @@ package com.iluwatar.layers;
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
@@ -16,10 +17,10 @@ public class Cake {
 	@GeneratedValue
 	private Long id;
 
-	@OneToOne
+	@OneToOne(cascade = CascadeType.ALL)
 	private CakeTopping topping;
 	
-	@OneToMany
+	@OneToMany(cascade = CascadeType.ALL)
 	private List<CakeLayer> layers;
 	
 	public Cake() {		
@@ -49,4 +50,8 @@ public class Cake {
 	public void setLayers(List<CakeLayer> layers) {
 		this.layers = layers;
 	}
+	
+	public void addLayer(CakeLayer layer) {
+		this.layers.add(layer);
+	}
 }

layers/src/main/java/com/iluwatar/layers/CakeBakingServiceImpl.java

@@ -8,7 +8,11 @@ import java.util.stream.Collectors;
 
 import org.springframework.context.support.AbstractApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
+@Service
+@Transactional
 public class CakeBakingServiceImpl implements CakeBakingService {
 
 	private AbstractApplicationContext context;
@@ -22,23 +26,31 @@ public class CakeBakingServiceImpl implements CakeBakingService {
 		List<CakeToppingInfo> allToppings = getAllToppings();
 		List<CakeToppingInfo> matchingToppings = allToppings.stream()
 				.filter((t) -> t.name.equals(cakeInfo.cakeToppingInfo.name)).collect(Collectors.toList());
-		if (!matchingToppings.isEmpty()) {
+		if (matchingToppings.isEmpty()) {
-//			CakeToppingDao toppingBean = context.getBean(CakeToppingDao.class);
-//			toppingBean.delete(matchingToppings.iterator().next().id.get());
-		} else {
 			throw new CakeBakingException(String.format("Topping %s is not available", cakeInfo.cakeToppingInfo.name));
 		}
-		List<CakeLayerInfo> allLayers = getAllLayers();
+		List<CakeLayer> allLayers = getAllLayerEntities();
+		List<CakeLayer> foundLayers = new ArrayList<>();
 		for (CakeLayerInfo info: cakeInfo.cakeLayerInfos) {
-			Optional<CakeLayerInfo> found = allLayers.stream().filter((layer) -> layer.name.equals(info.name)).findFirst();
+			Optional<CakeLayer> found = allLayers.stream().filter((layer) -> layer.getName().equals(info.name)).findFirst();
-			if (found.isPresent()) {
+			if (!found.isPresent()) {
-//				CakeLayerDao layerBean = context.getBean(CakeLayerDao.class);
-//				layerBean.delete(found.get().id.get());
-			} else {
 				throw new CakeBakingException(String.format("Layer %s is not available", info.name));
+			} else {
+				foundLayers.add(found.get());
 			}
 		}
+		CakeToppingDao toppingBean = context.getBean(CakeToppingDao.class);
+		CakeTopping topping = toppingBean.findOne(matchingToppings.iterator().next().id.get());
 		CakeDao cakeBean = context.getBean(CakeDao.class);
+		Cake cake = new Cake();
+		cake = cakeBean.save(cake);
+		cake.setTopping(topping);
+		topping.setCake(cake);
+		cake.setLayers(foundLayers);
+		for (CakeLayer layer: foundLayers) {
+			layer.setCake(cake);
+		}
+		cakeBean.save(cake);
 	}
 
 	@Override
@@ -53,6 +65,16 @@ public class CakeBakingServiceImpl implements CakeBakingService {
 		bean.save(new CakeLayer(layerInfo.name, layerInfo.calories));
 	}
 
+	private List<CakeTopping> getAllToppingEntities() {
+		CakeToppingDao bean = context.getBean(CakeToppingDao.class);
+		List<CakeTopping> result = new ArrayList<>();
+		Iterator<CakeTopping> iterator = bean.findAll().iterator();
+		while (iterator.hasNext()) {
+			result.add(iterator.next());
+		}
+		return result;
+	}
+	
 	@Override
 	public List<CakeToppingInfo> getAllToppings() {
 		CakeToppingDao bean = context.getBean(CakeToppingDao.class);
@@ -65,6 +87,16 @@ public class CakeBakingServiceImpl implements CakeBakingService {
 		return result;
 	}
 
+	private List<CakeLayer> getAllLayerEntities() {
+		CakeLayerDao bean = context.getBean(CakeLayerDao.class);
+		List<CakeLayer> result = new ArrayList<>();
+		Iterator<CakeLayer> iterator = bean.findAll().iterator();
+		while (iterator.hasNext()) {
+			result.add(iterator.next());
+		}
+		return result;
+	}
+	
 	@Override
 	public List<CakeLayerInfo> getAllLayers() {
 		CakeLayerDao bean = context.getBean(CakeLayerDao.class);

layers/src/main/java/com/iluwatar/layers/CakeLayer.java

@@ -1,8 +1,10 @@
 package com.iluwatar.layers;
 
+import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
+import javax.persistence.ManyToOne;
 
 @Entity
 public class CakeLayer {
@@ -15,6 +17,9 @@ public class CakeLayer {
 
 	private int calories;
 	
+	@ManyToOne(cascade = CascadeType.ALL)
+	private Cake cake;
+
 	public CakeLayer() {
 	}
 
@@ -51,4 +56,12 @@ public class CakeLayer {
 	public String toString() {
 		return String.format("name: %s calories: %d", name, calories);
 	}
+
+	public Cake getCake() {
+		return cake;
+	}
+
+	public void setCake(Cake cake) {
+		this.cake = cake;
+	}
 }

layers/src/main/java/com/iluwatar/layers/CakeLayerInfo.java

@@ -22,6 +22,6 @@ public class CakeLayerInfo {
 	
 	@Override
 	public String toString() {
-		return String.format("name: %s calories: %d", name, calories);
+		return String.format("CakeLayerInfo name: %s calories: %d", name, calories);
 	}
 }

layers/src/main/java/com/iluwatar/layers/CakeTopping.java

@@ -1,8 +1,10 @@
 package com.iluwatar.layers;
 
+import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
+import javax.persistence.OneToOne;
 
 @Entity
 public class CakeTopping {
@@ -15,6 +17,9 @@ public class CakeTopping {
 	
 	private int calories;
 	
+	@OneToOne(cascade = CascadeType.ALL)
+	private Cake cake;
+	
 	public CakeTopping() {
 	}
 	
@@ -51,4 +56,12 @@ public class CakeTopping {
 	public String toString() {
 		return String.format("name: %s calories: %d", name, calories);
 	}
+
+	public Cake getCake() {
+		return cake;
+	}
+
+	public void setCake(Cake cake) {
+		this.cake = cake;
+	}
 }

layers/src/main/java/com/iluwatar/layers/CakeToppingInfo.java

@@ -22,6 +22,6 @@ public class CakeToppingInfo {
 	
 	@Override
 	public String toString() {
-		return String.format("name: %s calories: %d", name, calories);
+		return String.format("CakeToppingInfo name: %s calories: %d", name, calories);
 	}
 }

layers/src/main/resources/applicationContext.xml

@@ -6,10 +6,12 @@
 	xmlns:jpa="http://www.springframework.org/schema/data/jpa"
 	xsi:schemaLocation="
 				http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
-				http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd">
+				http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
 
 	<jpa:repositories base-package="com.iluwatar" />
 
+	<tx:annotation-driven transaction-manager="transactionManager" />
+
 	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
 		<property name="entityManagerFactory" ref="entityManagerFactory" />
 	</bean>
@@ -33,6 +35,7 @@
 			<map>
 				<entry key="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
 				<entry key="hibernate.hbm2ddl.auto" value="create-drop" />
+				<entry key="hibernate.show_sql" value="true" />
 			</map>
 		</property>
 	</bean>