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.schema; 023 024import java.io.Serializable; 025 026/** 027 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 028 */ 029public class Namespace implements Serializable { 030 031 public static final Namespace DEFAULT_NS = new Namespace(); 032 033 private static final long serialVersionUID = -3069469489908062592L; 034 035 private static final String DEFAULT_PREFIX = ""; 036 037 private static final String DEFAULT_URI = ""; 038 039 public final String uri; 040 041 public final String prefix; 042 043 public Namespace(String uri, String prefix) { 044 assert uri != null; 045 if (uri.length() == 0 && prefix.length() > 0) { 046 throw new IllegalArgumentException("prefix cannot be not empty if the uri is empty"); 047 } 048 this.uri = uri; 049 this.prefix = prefix == null ? "" : prefix; 050 } 051 052 private Namespace() { 053 this(DEFAULT_URI, DEFAULT_PREFIX); 054 } 055 056 public boolean hasPrefix() { 057 return prefix.length() > 0; 058 } 059 060 @Override 061 public boolean equals(Object obj) { 062 if (obj == this) { 063 return true; 064 } 065 if (obj instanceof Namespace) { 066 Namespace ns = (Namespace) obj; 067 return ns.uri.equals(uri) && ns.prefix.equals(prefix); 068 } 069 return false; 070 } 071 072 @Override 073 public int hashCode() { 074 return uri.hashCode(); 075 } 076 077 @Override 078 public String toString() { 079 return uri + " [" + prefix + ']'; 080 } 081 082}