001/* QName.java - An XML qualified name. 002 Copyright (C) 2004,2005,2006 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package javax.xml.namespace; 040 041import gnu.java.lang.CPStringBuilder; 042 043import java.io.Serializable; 044 045import javax.xml.XMLConstants; 046 047/** 048 * An XML 049 * <a href='http://www.w3.org/TR/REC-xml-names/#ns-qualnames'>qualified name</a>. 050 * 051 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 052 * @since 1.3 053 */ 054public class QName implements Serializable 055{ 056 private static final long serialVersionUID = 4418622981026545151L; 057 058 private final String namespaceURI; 059 private final String localPart; 060 private final String prefix; 061 private transient String qName; 062 transient int hashCode = -1; 063 064 public QName(String namespaceURI, String localPart) 065 { 066 this(namespaceURI, localPart, null); 067 } 068 069 public QName(String namespaceURI, String localPart, String prefix) 070 { 071 if (namespaceURI == null) 072 namespaceURI = XMLConstants.NULL_NS_URI; 073 if (localPart == null) 074 throw new IllegalArgumentException(); 075 if (prefix == null) 076 prefix = XMLConstants.DEFAULT_NS_PREFIX; 077 else 078 { 079 if (XMLConstants.XML_NS_PREFIX.equals(prefix)) 080 namespaceURI = XMLConstants.XML_NS_URI; 081 else if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix)) 082 namespaceURI = XMLConstants.XMLNS_ATTRIBUTE_NS_URI; 083 } 084 this.namespaceURI = namespaceURI; 085 this.localPart = localPart; 086 this.prefix = prefix; 087 } 088 089 public QName(String localPart) 090 { 091 this(null, localPart, null); 092 } 093 094 public String getNamespaceURI() 095 { 096 return namespaceURI; 097 } 098 099 public String getLocalPart() 100 { 101 return localPart; 102 } 103 104 public String getPrefix() 105 { 106 return prefix; 107 } 108 109 public final boolean equals(Object obj) 110 { 111 if (obj instanceof QName) 112 { 113 QName qname = (QName) obj; 114 return qname.getLocalPart().equals(localPart) && 115 qname.getNamespaceURI().equals(namespaceURI); 116 } 117 return false; 118 } 119 120 public final int hashCode() 121 { 122 if (hashCode == -1) 123 hashCode = localPart.hashCode() ^ namespaceURI.hashCode(); 124 return hashCode; 125 } 126 127 public synchronized String toString() 128 { 129 if (qName == null) 130 { 131 CPStringBuilder buf = new CPStringBuilder(); 132 if (namespaceURI.length() > 0) 133 { 134 buf.append('{'); 135 buf.append(namespaceURI); 136 buf.append('}'); 137 } 138 if (prefix.length() > 0) 139 { 140 buf.append(prefix); 141 buf.append(':'); 142 } 143 buf.append(localPart); 144 qName = buf.toString(); 145 } 146 return qName; 147 } 148 149 public static QName valueOf(String qNameAsString) 150 { 151 if (qNameAsString == null) 152 throw new IllegalArgumentException("qNameAsString can't be null"); 153 154 String namespaceUri = "", prefix = null; 155 int start = qNameAsString.indexOf('{'); 156 int end = qNameAsString.indexOf('}'); 157 if (start != -1) 158 { 159 if (end < start) 160 throw new IllegalArgumentException(qNameAsString); 161 namespaceUri = qNameAsString.substring(start + 1, end); 162 qNameAsString = qNameAsString.substring(end + 1); 163 } 164 start = qNameAsString.indexOf(':'); 165 if (start != -1) 166 { 167 prefix = qNameAsString.substring(0, start); 168 qNameAsString = qNameAsString.substring(start + 1); 169 } 170 return new QName(namespaceUri, qNameAsString, prefix); 171 } 172 173}