Copyright (c) 2000, 2008 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.launching;


import java.util.EventObject;
An event object describing a change to a named property.

JavaRuntime provides change notification for properties of VM installs


Clients may instantiate this class.

Since:
2.0
@noextend
This class is not intended to be subclassed by clients./**
 * An event object describing a change to a named property.
 * <p>
 * JavaRuntime provides change notification for properties of VM installs
 * </p>
 * <p>
 * Clients may instantiate this class.
 * </p>
 * @since 2.0
 * @noextend This class is not intended to be subclassed by clients.
 */
public class PropertyChangeEvent extends EventObject {

    
All serializable objects should have a stable serialVersionUID
/**
     * All serializable objects should have a stable serialVersionUID
     */
    private static final long serialVersionUID = 1L;

	
The name of the changed property.
/**
	 * The name of the changed property.
	 */
	private String propertyName;

	
The old value of the changed property, or null if
not known or not relevant.
/**
	 * The old value of the changed property, or <code>null</code> if
	 * not known or not relevant.
	 */
	private Object oldValue;

	
The new value of the changed property, or null if
not known or not relevant.
/**
	 * The new value of the changed property, or <code>null</code> if
	 * not known or not relevant.
	 */
	private Object newValue;

	
Creates a new property change event.
Params:
source – the object whose property has changed
property – the property that has changed (must not be
   null)
oldValue – the old value of the property, or
   null if none
newValue – the new value of the property, or
   null if none/**
	 * Creates a new property change event.
	 *
	 * @param source the object whose property has changed
	 * @param property the property that has changed (must not be
	 *    <code>null</code>)
	 * @param oldValue the old value of the property, or
	 *    <code>null</code> if none
	 * @param newValue the new value of the property, or
	 *    <code>null</code> if none
	 */
	public PropertyChangeEvent(
		Object source,
		String property,
		Object oldValue,
		Object newValue) {

		super(source);
		if (property == null) {
			throw new IllegalArgumentException();
		}
		this.propertyName = property;
		this.oldValue = oldValue;
		this.newValue = newValue;
	}

	
Returns the name of the property that changed.
Returns:
the name of the property that changed/**
	 * Returns the name of the property that changed.
	 *
	 * @return the name of the property that changed
	 */
	public String getProperty() {
		return propertyName;
	}

	
Returns the new value of the property.
Returns:
the new value, or null if not known
 or not relevant/**
	 * Returns the new value of the property.
	 *
	 * @return the new value, or <code>null</code> if not known
	 *  or not relevant
	 */
	public Object getNewValue() {
		return newValue;
	}

	
Returns the old value of the property.
Returns:
the old value, or null if not known
 or not relevant/**
	 * Returns the old value of the property.
	 *
	 * @return the old value, or <code>null</code> if not known
	 *  or not relevant
	 */
	public Object getOldValue() {
		return oldValue;
	}
}