WeakWrapper.java

/**
 * Copyright 2016 Alex Yanchenko
 *
 * 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.droidparts.inner;

import java.lang.ref.WeakReference;

public class WeakWrapper<T> {

	private final WeakReference<T> ref;
	private final int hash;

	public WeakWrapper(T obj) {
		ref = new WeakReference<T>(obj);
		hash = obj.hashCode();
	}

	public T getObj() {
		return ref.get();
	}

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

	@Override
	public int hashCode() {
		return hash;
	}

}