Glassfish example source code file (MappingMemberElementImpl.java)

This example Glassfish source code file (MappingMemberElementImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

bean, javabean, mappingclasselement, mappingclasselement, mappingelementimpl, mappingmemberelement, mappingmemberelementimpl, mappingmemberelementimpl, object, object, prop_modified, propertyvetoexception, string, string

The Glassfish MappingMemberElementImpl.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

/*
 * MappingMemberElementImpl.java
 *
 * Created on May 23, 2000, 12:41 AM
 */

package com.sun.jdo.api.persistence.model.mapping.impl;

import java.beans.PropertyVetoException;

import com.sun.jdo.api.persistence.model.ModelException;
import com.sun.jdo.api.persistence.model.ModelVetoException;
import com.sun.jdo.api.persistence.model.mapping.*;

/** 
 *
 * @author Mark Munro
 * @author Rochelle Raccah
 * @version %I%
 */
public abstract class MappingMemberElementImpl extends MappingElementImpl
	implements MappingMemberElement
{
	/** the class to which this element belongs */
	MappingClassElement _declaringClass;

	/** Create new MappingMemberElementImpl with no corresponding name or 
	 * declaring class.  This constructor should only be used for cloning and 
	 * archiving.
	 */
	public MappingMemberElementImpl () 
	{
		this(null, null);
	}

	/** Create new MappingMemberElementImpl with the corresponding name and 
	 * declaring class.
	 * @param name the name of the element
	 * @param declaringClass the class to attach to
	 */
	public MappingMemberElementImpl (String name, 
		MappingClassElement declaringClass) 
	{
		super(name);
		_declaringClass = declaringClass;
	}

	/** Get the declaring class.
	 * @return the class that owns this member element, or <code>null
	 * if the element is not attached to any class
	 */
	public MappingClassElement getDeclaringClass () { return _declaringClass; }

	/** Overrides MappingElementImpl's <code>equals method to add  
	 * comparison of the name of the declaring class this mapping element.
	 * The method returns <code>false if obj does not have a declaring 
	 * class with the same name as this mapping element.
	 * @return <code>true if this object is the same as the obj argument;
	 * <code>false otherwise.
	 * @param obj the reference object with which to compare.
	 */
	public boolean equals (Object obj)
	{
		if (super.equals(obj) && (obj instanceof MappingMemberElement))
		{
			MappingClassElement declaringClass = getDeclaringClass();
			MappingClassElement objDeclaringClass = 
				((MappingMemberElement)obj).getDeclaringClass();

			return ((declaringClass == null) ? (objDeclaringClass == null) :
				declaringClass.equals(objDeclaringClass));
		}

		return false;
	}

	/** Overrides MappingElementImpl's <code>hashCode method to add 
	 * the hashCode of this mapping element's declaring class.
	 * @return a hash code value for this object.
	 */
	public int hashCode ()
	{
		MappingClassElement declaringClass = getDeclaringClass();

		return (super.hashCode() + 
			((declaringClass == null) ? 0 : declaringClass.hashCode()));
	}

	/** Fires property change event.  This method overrides that of 
	 * MappingElementImpl to update the MappingClassElementImpl's modified 
	 * status.
	 * @param name property name
	 * @param o old value
	 * @param n new value
	 */
	protected final void firePropertyChange (String name, Object o, Object n)
	{
		// even though o == null and n == null will signify a change, that 
		// is consistent with PropertyChangeSupport's behavior and is 
		// necessary for this to work
		boolean noChange = ((o != null) && (n != null) && o.equals(n));
		MappingClassElement classElement = getDeclaringClass();

		super.firePropertyChange(name, o, n);

		if ((classElement != null) && !noChange)
			classElement.setModified(true);
	}

	/** Fires vetoable change event.  This method overrides that of 
	 * MappingElementImpl to give listeners a chance to block 
	 * changes on the mapping class element modified status.
	 * @param name property name
	 * @param o old value
	 * @param n new value
	 * @exception PropertyVetoException when the change is vetoed by a listener
	 */
	protected final void fireVetoableChange (String name, Object o, Object n)
		throws PropertyVetoException
	{
		// even though o == null and n == null will signify a change, that 
		// is consistent with PropertyChangeSupport's behavior and is 
		// necessary for this to work
		boolean noChange = ((o != null) && (n != null) && o.equals(n));
		MappingClassElement classElement = getDeclaringClass();

		super.fireVetoableChange(name, o, n);

		if ((classElement != null) && !noChange)
		{
			((MappingClassElementImpl)classElement).fireVetoableChange(
				PROP_MODIFIED, Boolean.FALSE, Boolean.TRUE);
		}
	}

	//=============== extra set methods needed for xml archiver ==============

	/** Set the declaring class of this mapping member.  This method should 
	 * only be used internally and for cloning and archiving.
	 * @param declaringClass the declaring class of this mapping member
	 */
	public void setDeclaringClass (MappingClassElement declaringClass)
	{
		_declaringClass = declaringClass;
	}
}