001/*
002 * (C) Copyright 2006-2007 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Nuxeo - initial API and implementation
016 *
017 * $Id: AbstractNode.java 20645 2007-06-17 13:16:54Z sfermigier $
018 */
019
020package org.nuxeo.ecm.platform.relations.api.impl;
021
022import org.nuxeo.ecm.platform.relations.api.Node;
023
024/**
025 * Abstract class for nodes.
026 * <p>
027 * Nodes can be resources, blank nodes or literals.
028 *
029 * @author <a href="mailto:at@nuxeo.com">Anahide Tchertchian</a>
030 */
031public abstract class AbstractNode implements Node {
032
033    private static final long serialVersionUID = 1L;
034
035    public boolean isLiteral() {
036        return false;
037    }
038
039    public boolean isBlank() {
040        return false;
041    }
042
043    public boolean isResource() {
044        return false;
045    }
046
047    public boolean isQNameResource() {
048        return false;
049    }
050
051    public int compareTo(Node o) {
052        // dummy override, just used to compare statements lists
053        return toString().compareTo(o.toString());
054    }
055
056}