001/*
002 * (C) Copyright 2006-2007 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: AbstractNode.java 20645 2007-06-17 13:16:54Z sfermigier $
020 */
021
022package org.nuxeo.ecm.platform.relations.api.impl;
023
024import org.nuxeo.ecm.platform.relations.api.Node;
025
026/**
027 * Abstract class for nodes.
028 * <p>
029 * Nodes can be resources, blank nodes or literals.
030 *
031 * @author <a href="mailto:at@nuxeo.com">Anahide Tchertchian</a>
032 */
033public abstract class AbstractNode implements Node {
034
035    private static final long serialVersionUID = 1L;
036
037    public boolean isLiteral() {
038        return false;
039    }
040
041    public boolean isBlank() {
042        return false;
043    }
044
045    public boolean isResource() {
046        return false;
047    }
048
049    public boolean isQNameResource() {
050        return false;
051    }
052
053    public int compareTo(Node o) {
054        // dummy override, just used to compare statements lists
055        return toString().compareTo(o.toString());
056    }
057
058}