io.guise.framework.event.SetEvent Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of guise-framework Show documentation

Guise™ Internet application framework.

There is a newer version: 0.5.3

/*
 * Copyright © 2005-2008 GlobalMentor, Inc. 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.guise.framework.event;

/**
 * An event indicating a set has been modified. If a single element was replaced both an added and removed element will be provided. If neither an added nor a
 * removed element are provided, the event represents a general set modification.
 * @param  The type of elements contained in the set.
 * @author Garret Wilson
 */
public class SetEvent extends CollectionEvent {

	/**
	 * Source constructor for general set modification.
	 * @param source The object on which the event initially occurred.
	 * @throws NullPointerException if the given source is null.
	 */
	public SetEvent(final Object source) {
		this(source, null, null); //construct the class with no known modification values
	}

	/**
	 * Source constructor for an added and/or removed element.
	 * @param source The object on which the event initially occurred.
	 * @param addedElement The element that was added to the set, or null if no element was added or it is unknown whether or which elements were
	 *          added.
	 * @param removedElement The element that was removed from the set, or null if no element was removed or it is unknown whether or which elements
	 *          were removed.
	 * @throws NullPointerException if the given source is null.
	 */
	public SetEvent(final Object source, final E addedElement, final E removedElement) {
		super(source, addedElement, removedElement); //construct the parent class
	}
}