/*
 * Copyright 2005-2010 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.wamblee.general;

/**
 * This class provided an equality operation based on the object reference of
 * the wrapped object. This is required because we cannto assume that the equals
 * operation has any meaning for different types of persistent objects. This
 * allows us to use the standard collection classes for detecting cyclic
 * dependences and avoiding recursion.
 */
public class ObjectElem {
    private Object object;

    /**
     * Constructs the wrapper.
     * 
     * @param aObject
     *            Object.
     */
    public ObjectElem(Object aObject) {
        object = aObject;
    }

    public boolean equals(Object aObj) {
        if (aObj == null) {
            return false;
        }
        if (!(aObj instanceof ObjectElem)) {
            return false;
        }
        return ((ObjectElem) aObj).object == object;
    }

    public int hashCode() {
        return object.hashCode();
    }
}