libjava/javax/xml/namespace/QName.java

   1 /* QName.java --
   2    Copyright (C) 2004, 2005  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package javax.xml.namespace;
  39
  40 import javax.xml.XMLConstants;
  41
  42 /**
  43  * An XML
  44  * <a href='http://www.w3.org/TR/REC-xml-names/#ns-qualnames'>qualified name</a>.
  45  *
  46  * @author (a href='mailto:dog@gnu.org'>Chris Burdess</a)
  47  * @since 1.3
  48  */
  49 public class QName
  50 {
  51
  52   private final String namespaceURI;
  53   private final String localPart;
  54   private final String prefix;
  55   private final String qName;
  56
  57   public QName(String namespaceURI, String localPart)
  58   {
  59     this(namespaceURI, localPart, null);
  60   }
  61
  62   public QName(String namespaceURI, String localPart, String prefix)
  63   {
  64     if (namespaceURI == null)
  65       {
  66         namespaceURI = XMLConstants.NULL_NS_URI;
  67       }
  68     if (localPart == null)
  69       {
  70         throw new IllegalArgumentException();
  71       }
  72     if (prefix == null)
  73       {
  74         prefix = XMLConstants.DEFAULT_NS_PREFIX;
  75       }
  76     this.namespaceURI = namespaceURI;
  77     this.localPart = localPart;
  78     this.prefix = prefix;
  79
  80     StringBuffer buf = new StringBuffer();
  81     if (namespaceURI != null && namespaceURI.length() > 0)
  82       {
  83         buf.append('{');
  84         buf.append(namespaceURI);
  85         buf.append('}');
  86       }
  87     if (prefix != null && prefix.length() > 0)
  88       {
  89         buf.append(prefix);
  90         buf.append(':');
  91       }
  92     buf.append(localPart);
  93     qName = buf.toString();
  94   }
  95
  96   public QName(String localPart)
  97   {
  98     this(null, localPart, null);
  99   }
 100
 101   public String getNamespaceURI()
 102   {
 103     return namespaceURI;
 104   }
 105
 106   public String getLocalPart()
 107   {
 108     return localPart;
 109   }
 110
 111   public String getPrefix()
 112   {
 113     return prefix;
 114   }
 115
 116   public boolean equals(Object obj)
 117   {
 118     if (obj instanceof QName)
 119       {
 120         QName qname = (QName) obj;
 121         return qname.getLocalPart().equals(localPart) &&
 122           qname.getNamespaceURI().equals(namespaceURI);
 123       }
 124     return false;
 125   }
 126
 127   public final int hashCode()
 128   {
 129     return qName.hashCode();
 130   }
 131
 132   public String toString()
 133   {
 134     return qName;
 135   }
 136
 137   public static QName valueOf(String qNameAsString)
 138   {
 139     String namespaceUri = "", prefix = null;
 140     int start = qNameAsString.indexOf('{');
 141     int end = qNameAsString.indexOf('}');
 142     if (start != -1)
 143       {
 144         if (end < start)
 145           {
 146             throw new IllegalArgumentException(qNameAsString);
 147           }
 148         namespaceUri = qNameAsString.substring(start + 1, end);
 149         qNameAsString = qNameAsString.substring(end + 1);
 150       }
 151     start = qNameAsString.indexOf(':');
 152     if (start != -1)
 153       {
 154         prefix = qNameAsString.substring(0, start);
 155         qNameAsString = qNameAsString.substring(start + 1);
 156       }
 157     return new QName(namespaceUri, qNameAsString, prefix);
 158   }
 159
 160 }