001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.core.api;
023
024/**
025 * An ID reference to a document.
026 *
027 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
028 */
029public class IdRef implements DocumentRef {
030
031    private static final long serialVersionUID = 2796201881930443026L;
032
033    public final String value;
034
035    public IdRef(String value) {
036        this.value = value;
037    }
038
039    @Override
040    public int type() {
041        return ID;
042    }
043
044    @Override
045    public Object reference() {
046        return value;
047    }
048
049    @Override
050    public int hashCode() {
051        return value.hashCode();
052    }
053
054    @Override
055    public boolean equals(Object obj) {
056        if (this == obj) {
057            return true;
058        }
059        if (obj instanceof IdRef) {
060            return ((IdRef) obj).value.equals(value);
061        }
062        // it is not possible to compare an IdRef with a PathRef
063        return false;
064    }
065
066    @Override
067    public String toString() {
068        return value;
069    }
070
071}