001 /* QName.java - An XML qualified name. 002 Copyright (C) 2004,2005,2006 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 039 package javax.xml.namespace; 040 041 import java.io.Serializable; 042 043 import javax.xml.XMLConstants; 044 045 /** 046 * An XML 047 * <a href='http://www.w3.org/TR/REC-xml-names/#ns-qualnames'>qualified name</a>. 048 * 049 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 050 * @since 1.3 051 */ 052 public class QName implements Serializable 053 { 054 private static final long serialVersionUID = 4418622981026545151L; 055 056 private final String namespaceURI; 057 private final String localPart; 058 private final String prefix; 059 private transient String qName; 060 transient int hashCode = -1; 061 062 public QName(String namespaceURI, String localPart) 063 { 064 this(namespaceURI, localPart, null); 065 } 066 067 public QName(String namespaceURI, String localPart, String prefix) 068 { 069 if (namespaceURI == null) 070 namespaceURI = XMLConstants.NULL_NS_URI; 071 if (localPart == null) 072 throw new IllegalArgumentException(); 073 if (prefix == null) 074 prefix = XMLConstants.DEFAULT_NS_PREFIX; 075 else 076 { 077 if (XMLConstants.XML_NS_PREFIX.equals(prefix)) 078 namespaceURI = XMLConstants.XML_NS_URI; 079 else if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix)) 080 namespaceURI = XMLConstants.XMLNS_ATTRIBUTE_NS_URI; 081 } 082 this.namespaceURI = namespaceURI; 083 this.localPart = localPart; 084 this.prefix = prefix; 085 } 086 087 public QName(String localPart) 088 { 089 this(null, localPart, null); 090 } 091 092 public String getNamespaceURI() 093 { 094 return namespaceURI; 095 } 096 097 public String getLocalPart() 098 { 099 return localPart; 100 } 101 102 public String getPrefix() 103 { 104 return prefix; 105 } 106 107 public final boolean equals(Object obj) 108 { 109 if (obj instanceof QName) 110 { 111 QName qname = (QName) obj; 112 return qname.getLocalPart().equals(localPart) && 113 qname.getNamespaceURI().equals(namespaceURI); 114 } 115 return false; 116 } 117 118 public final int hashCode() 119 { 120 if (hashCode == -1) 121 hashCode = localPart.hashCode() ^ namespaceURI.hashCode(); 122 return hashCode; 123 } 124 125 public synchronized String toString() 126 { 127 if (qName == null) 128 { 129 StringBuffer buf = new StringBuffer(); 130 if (namespaceURI.length() > 0) 131 { 132 buf.append('{'); 133 buf.append(namespaceURI); 134 buf.append('}'); 135 } 136 if (prefix.length() > 0) 137 { 138 buf.append(prefix); 139 buf.append(':'); 140 } 141 buf.append(localPart); 142 qName = buf.toString(); 143 } 144 return qName; 145 } 146 147 public static QName valueOf(String qNameAsString) 148 { 149 String namespaceUri = "", prefix = null; 150 int start = qNameAsString.indexOf('{'); 151 int end = qNameAsString.indexOf('}'); 152 if (start != -1) 153 { 154 if (end < start) 155 throw new IllegalArgumentException(qNameAsString); 156 namespaceUri = qNameAsString.substring(start + 1, end); 157 qNameAsString = qNameAsString.substring(end + 1); 158 } 159 start = qNameAsString.indexOf(':'); 160 if (start != -1) 161 { 162 prefix = qNameAsString.substring(0, start); 163 qNameAsString = qNameAsString.substring(start + 1); 164 } 165 return new QName(namespaceUri, qNameAsString, prefix); 166 } 167 168 }