IdentifiableApplicationEvent.java

/*
 * Copyright 2002-2016 the original author or authors.
 *
 * 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 org.springframework.context.event.test;

import java.util.UUID;

import org.springframework.context.ApplicationEvent;

/**
 * A basic test event that can be uniquely identified easily.
 *
 * @author Stephane Nicoll
 */
@SuppressWarnings("serial")
public abstract class IdentifiableApplicationEvent extends ApplicationEvent implements Identifiable {

	private final String id;

	protected IdentifiableApplicationEvent(Object source, String id) {
		super(source);
		this.id = id;
	}

	protected IdentifiableApplicationEvent(Object source) {
		this(source, UUID.randomUUID().toString());
	}

	protected IdentifiableApplicationEvent() {
		this(new Object());
	}

	@Override
	public String getId() {
		return this.id;
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) return true;
		if (o == null || getClass() != o.getClass()) return false;

		IdentifiableApplicationEvent that = (IdentifiableApplicationEvent) o;

		return this.id.equals(that.id);

	}

	@Override
	public int hashCode() {
		return this.id.hashCode();
	}

}