4 files changed, 314 insertions, 0 deletions
diff --git a/src/jpa/Category.java b/src/jpa/Category.java
new file mode 100644
index 0000000..c29c1f7
--- /dev/null
+++ b/src/jpa/Category.java
@@ -0,0 +1,103 @@
+package jpa;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Set;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToMany;
+
+@Entity
+public class Category implements Serializable
+{
+   @Id
+   private int id;
+
+   private String name;
+
+   private String description;
+
+   @ManyToMany(mappedBy = "categoryCollection")
+   private Set<Product> productCollection;
+
+   private static final long serialVersionUID = 1L;
+
+   public Category()
+   {
+      super();
+   }
+
+   public int getId()
+   {
+      return this.id;
+   }
+
+   public void setId(int id)
+   {
+      this.id = id;
+   }
+
+   public String getName()
+   {
+      return this.name;
+   }
+
+   public void setName(String name)
+   {
+      this.name = name;
+   }
+
+   public String getDescription()
+   {
+      return this.description;
+   }
+
+   public void setDescription(String description)
+   {
+      this.description = description;
+   }
+
+   /**
+    * The method <code>getProductCollection()</code> returns a
+    * Collection object that is incompatible with JSF.
+    *
+    * @return collection of product objects.
+    */
+   public Collection<Product> getProducts()
+   {
+      Collection<Product> c = new ArrayList<Product>();
+      
+      for (Iterator iter = getProductCollection().iterator(); iter.hasNext();)
+      {
+         Product product = (Product) iter.next();
+         c.add(product);
+//         System.out.println(product.getName());
+      }
+      
+      return c;
+   }
+
+   public Set<Product> getProductCollection()
+   {
+      return this.productCollection;
+   }
+
+   public void setProductCollection(Set<Product> productCollection)
+   {
+      this.productCollection = productCollection;
+   }
+
+   public void addProduct(Product product)
+   {
+      Set<Product> products = getProductCollection();
+      if (!products.contains(product))
+      {
+         products.add(product);
+         product.addCategory(this);
+      }
+   }
+
+}
diff --git a/src/jpa/JPATest.java b/src/jpa/JPATest.java
new file mode 100644
index 0000000..5a4749e
--- /dev/null
+++ b/src/jpa/JPATest.java
@@ -0,0 +1,62 @@
+package jpa;
+
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.EntityTransaction;
+import javax.persistence.Persistence;
+
+public class JPATest
+{
+   /**
+    * @param args
+    */
+   public static void main(String[] args)
+   {
+      EntityManagerFactory factory = Persistence
+            .createEntityManagerFactory("catalog");
+      EntityManager manager = factory.createEntityManager();
+      EntityTransaction tx = manager.getTransaction();
+      tx.begin();
+      try
+      {
+//         Product product = manager.find(Product.class, "7");
+//         Category newCategory = manager.find(Category.class, 4);
+//         product.addCategory(newCategory);
+//         manager.persist(product);
+//         Collection<Category> categories = product.getCategoryCollection();
+//         for (Category category : categories)
+//         {
+//            System.out.println(category.getName());
+//         }
+         Product product = new Product();
+         product.setDescription("Noch ein Testprodukt");
+         product.setName("Produkt");
+         manager.persist(product);
+//         User user = new User();
+//         user.setUsername("bestertester2");
+//         System.out.println(DigestUtils.md5("masterkey"));
+//         user.setPassword(DigestUtils.md5("masterkey"));
+//         manager.persist(user);
+         
+         tx.commit();
+      }
+      catch (Exception ex)
+      {
+         ex.printStackTrace(System.err);
+         tx.rollback();
+      }
+      
+//      CategoryManager cm = new CategoryManager();
+//      Collection<Category> categories = cm.getCategories();
+//      for (Category category : categories)
+//      {
+//         System.out.println(category.getName());
+//         Set<Product> products = category.getProductCollection();
+//         for (Product product : products)
+//         {
+//            System.out.println("\t" + product.getName());
+//         }
+//
+//      }
+   }
+}
diff --git a/src/jpa/Product.java b/src/jpa/Product.java
new file mode 100644
index 0000000..dc0b3f8
--- /dev/null
+++ b/src/jpa/Product.java
@@ -0,0 +1,113 @@
+package jpa;
+
+import java.io.Serializable;
+import java.math.BigDecimal;
+import java.util.Collection;
+import java.util.Set;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.JoinTable;
+import javax.persistence.ManyToMany;
+
+@Entity
+public class Product implements Serializable {
+	@Id
+	@GeneratedValue(strategy=GenerationType.SEQUENCE)
+	private String id;
+
+	private String description;
+
+	private BigDecimal price;
+
+	private String name;
+
+	private BigDecimal width;
+
+	private BigDecimal height;
+
+	@ManyToMany
+	@JoinTable(
+		joinColumns=@JoinColumn(name="product_id"),
+		inverseJoinColumns=@JoinColumn(name="category_id"))
+	private Set<Category> categoryCollection;
+
+	private static final long serialVersionUID = 1L;
+
+	public Product() {
+		super();
+	}
+
+	public String getId() {
+		return this.id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public String getDescription() {
+		return this.description;
+	}
+
+	public void setDescription(String description) {
+		this.description = description;
+	}
+
+	public BigDecimal getPrice() {
+		return this.price;
+	}
+
+	public void setPrice(BigDecimal price) {
+		this.price = price;
+	}
+
+	public String getName() {
+		return this.name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public BigDecimal getWidth() {
+		return this.width;
+	}
+
+	public void setWidth(BigDecimal width) {
+		this.width = width;
+	}
+
+	public BigDecimal getHeight() {
+		return this.height;
+	}
+
+	public void setHeight(BigDecimal height) {
+		this.height = height;
+	}
+
+    public Collection getCategories() {
+        return this.getCategoryCollection();
+    }
+
+	public Set<Category> getCategoryCollection() {
+		return this.categoryCollection;
+	}
+
+	public void setCategoryCollection(Set<Category> categoryCollection) {
+		this.categoryCollection = categoryCollection;
+	}
+
+    public void addCategory(Category category)
+    {
+       Set<Category> categories = getCategoryCollection();
+       if (!categories.contains(category))
+       {
+          categories.add(category);
+          category.addProduct(this);
+       }
+    }
+}
diff --git a/src/jpa/User.java b/src/jpa/User.java
new file mode 100644
index 0000000..32d2af8
--- /dev/null
+++ b/src/jpa/User.java
@@ -0,0 +1,36 @@
+package jpa;
+
+import java.io.Serializable;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class User implements Serializable {
+	@Id
+	private String username;
+
+	private String password;
+
+	private static final long serialVersionUID = 1L;
+
+	public User() {
+		super();
+	}
+
+	public String getUsername() {
+		return this.username;
+	}
+
+	public void setUsername(String username) {
+		this.username = username;
+	}
+
+	public String getPassword() {
+		return this.password;
+	}
+
+	public void setPassword(String password) {
+		this.password = password;
+	}
+
+}