001/* 002 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the Eclipse Public License v1.0 006 * which accompanies this distribution, and is available at 007 * http://www.eclipse.org/legal/epl-v10.html 008 * 009 * Contributors: 010 * Nuxeo - initial API and implementation 011 * 012 * $Id$ 013 */ 014 015package org.nuxeo.ecm.core.schema; 016 017import java.io.Serializable; 018 019/** 020 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 021 */ 022public class Namespace implements Serializable { 023 024 public static final Namespace DEFAULT_NS = new Namespace(); 025 026 private static final long serialVersionUID = -3069469489908062592L; 027 028 private static final String DEFAULT_PREFIX = ""; 029 030 private static final String DEFAULT_URI = ""; 031 032 public final String uri; 033 034 public final String prefix; 035 036 public Namespace(String uri, String prefix) { 037 assert uri != null; 038 if (uri.length() == 0 && prefix.length() > 0) { 039 throw new IllegalArgumentException("prefix cannot be not empty if the uri is empty"); 040 } 041 this.uri = uri; 042 this.prefix = prefix == null ? "" : prefix; 043 } 044 045 private Namespace() { 046 this(DEFAULT_URI, DEFAULT_PREFIX); 047 } 048 049 public boolean hasPrefix() { 050 return prefix.length() > 0; 051 } 052 053 @Override 054 public boolean equals(Object obj) { 055 if (obj == this) { 056 return true; 057 } 058 if (obj instanceof Namespace) { 059 Namespace ns = (Namespace) obj; 060 return ns.uri.equals(uri) && ns.prefix.equals(prefix); 061 } 062 return false; 063 } 064 065 @Override 066 public int hashCode() { 067 return uri.hashCode(); 068 } 069 070 @Override 071 public String toString() { 072 return uri + " [" + prefix + ']'; 073 } 074 075}