Example 1.46. Main.java

package samples.xdoclet;


import java.util.*;


/**
 *	<p>This is a simple example class using XDoclet. It is used to demonstrate 
 *	automatic generation of the JDO metadata file based on the 
 *	<code>jdo.*</code> XDoclet tags in the source code.</p>
 *
 * 	<p>The JDO tags above the class element apply to class-level metadata.  The
 *	<code>jdo.persistence-capable</code> tag is required to denote a persistent
 *	class.  The tag takes the same attribues as the <code>class</code> element
 *	in standard JDO metadata.  You can include class-level vendor extensions 
 *	with the <code>jdo.class-vendor-extension</code> tag.</p>
 *
 *	@jdo.persistence-capable
 * 		identity-type="application"
 * 		objectid-class="Main$Id"
 *	@jdo.class-vendor-extension
 *		vendor-name="kodo"
 *		key="data-cache-timeout"
 *		value="0"
 */
public class Main
{
	/**
	 *	Field-level metadata is declared with the <code>jdo.field</code> tag.
	 *	It takes the same attributes as the <code>field</code> element in
	 *	standard JDO metadata.
	 *	
	 *	@jdo.field
	 *		primary-key="true"
	 *	@jdo.field-vendor-extension
	 *		vendor-name="kodo"
	 *		key="jdbc-auto-increment"
	 *		value="true"
	 */
	private String pk1;

	/**
	 *	You are not required to place all attributes on a separate line as
	 *	we have been doing above.
	 *
	 *	@jdo.field primary-key="true"
	 *	@jdo.field-vendor-extension	vendor-name="kodo" 
	 *		key="jdbc-size" value="20"
	 */
	private String pk2;

	/**
	 *	@jdo.field
	 *		null-value="exception"
	 *		default-fetch-group="false"
	 */
	private String name;

	private Main main;

	/**
	 *	@jdo.field
	 *		default-fetch-group="true"
	 *		collection-type="collection"
	 *		element-type="Main"
	 *		embedded-element="false"
	 *	@jdo.field-vendor-extension
	 *		vendor-name="kodo"
	 *		key="inverse-owner"
	 *		value="main"
	 */
	private Collection nodes = new ArrayList ();

	/**
	 *	@jdo.field
	 *		collection-type="map"
	 *		key-type="String"
	 *		value-type="Integer"
	 */
	private Map cache = new HashMap ();


	public String getPk1 ()
	{
		return this.pk1;
	}


	public void setPk1 (String pk1)
	{
		this.pk1 = pk1;
	}


	public String getPk2 ()
	{
		return this.pk2;
	}


	public void setPk2 (String pk2)
	{
		this.pk2 = pk2;
	}


	public String getName ()
	{
		return this.name;
	}


	public void setName (String name)
	{
		this.name = name;
	}


	public Main getMain ()
	{
		return this.main;
	}


	public void setMain (Main main)
	{
		this.main = main;
	}


	public Collection getNodes ()
	{
		return this.nodes;
	}


	public Map getCache ()
	{
		return this.cache;
	}


	/**
	 *	Application identity class.
	 */
	public static class Id
	{
		private static final char DELIM = '/';

		public String pk1;
		public String pk2;


		public Id ()
		{
		}


		public Id (String serialized)
		{
			int idx = serialized.indexOf (DELIM);
			pk1 = serialized.substring (0, idx);
			pk2 = serialized.substring (idx + 1);
		}


		public boolean equals (Object other)
		{
			if (other == this)
				return true;
			if (!(other instanceof Id))
				return false;

			Id id = (Id) other;
			return pk1.equals (id.pk1) && pk2.equals (id.pk2);
		}


		public int hashCode ()
		{
			return pk1.hashCode () + pk2.hashCode ();
		}


		public String toString ()
		{
			return pk1 + DELIM + pk2;
		}
	}
}