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}