Source for javax.xml.namespace.QName

   1: /* QName.java - An XML qualified name.
   2:    Copyright (C) 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 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: 
  39: package javax.xml.namespace;
  40: 
  41: import javax.xml.XMLConstants;
  42: 
  43: /**
  44:  * An XML
  45:  * <a href='http://www.w3.org/TR/REC-xml-names/#ns-qualnames'>qualified name</a>.
  46:  *
  47:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  48:  * @since 1.3
  49:  */
  50: public class QName
  51: {
  52: 
  53:   private final String namespaceURI;
  54:   private final String localPart;
  55:   private final String prefix;
  56:   private final String qName;
  57:   int hashCode = -1;
  58: 
  59:   public QName(String namespaceURI, String localPart)
  60:   {
  61:     this(namespaceURI, localPart, null);
  62:   }
  63: 
  64:   public QName(String namespaceURI, String localPart, String prefix)
  65:   {
  66:     if (namespaceURI == null)
  67:       {
  68:         namespaceURI = XMLConstants.NULL_NS_URI;
  69:       }
  70:     if (localPart == null)
  71:       {
  72:         throw new IllegalArgumentException();
  73:       }
  74:     if (prefix == null)
  75:       {
  76:         prefix = XMLConstants.DEFAULT_NS_PREFIX;
  77:       }
  78:     this.namespaceURI = namespaceURI;
  79:     this.localPart = localPart;
  80:     this.prefix = prefix;
  81:     
  82:     StringBuffer buf = new StringBuffer();
  83:     if (namespaceURI.length() > 0)
  84:       {
  85:         buf.append('{');
  86:         buf.append(namespaceURI);
  87:         buf.append('}');
  88:       }
  89:     if (prefix.length() > 0)
  90:       {
  91:         buf.append(prefix);
  92:         buf.append(':');
  93:       }
  94:     buf.append(localPart);
  95:     qName = buf.toString();
  96:   }
  97: 
  98:   public QName(String localPart)
  99:   {
 100:     this(null, localPart, null);
 101:   }
 102: 
 103:   public String getNamespaceURI()
 104:   {
 105:     return namespaceURI;
 106:   }
 107: 
 108:   public String getLocalPart()
 109:   {
 110:     return localPart;
 111:   }
 112: 
 113:   public String getPrefix()
 114:   {
 115:     return prefix;
 116:   }
 117: 
 118:   public boolean equals(Object obj)
 119:   {
 120:     if (obj instanceof QName)
 121:       {
 122:         QName qname = (QName) obj;
 123:         return qname.getLocalPart().equals(localPart) &&
 124:           qname.getNamespaceURI().equals(namespaceURI);
 125:       }
 126:     return false;
 127:   }
 128: 
 129:   public final int hashCode()
 130:   {
 131:     if (hashCode == -1)
 132:       {
 133:         StringBuffer buf = new StringBuffer();
 134:         buf.append('{');
 135:         buf.append(namespaceURI);
 136:         buf.append('}');
 137:         buf.append(localPart);
 138:         hashCode = buf.toString().hashCode();
 139:       }
 140:     return hashCode;
 141:   }
 142: 
 143:   public String toString()
 144:   {
 145:     return qName;
 146:   }
 147: 
 148:   public static QName valueOf(String qNameAsString)
 149:   {
 150:     String namespaceUri = "", prefix = null;
 151:     int start = qNameAsString.indexOf('{');
 152:     int end = qNameAsString.indexOf('}');
 153:     if (start != -1)
 154:       {
 155:         if (end < start)
 156:           {
 157:             throw new IllegalArgumentException(qNameAsString);
 158:           }
 159:         namespaceUri = qNameAsString.substring(start + 1, end);
 160:         qNameAsString = qNameAsString.substring(end + 1);
 161:       }
 162:     start = qNameAsString.indexOf(':');
 163:     if (start != -1)
 164:       {
 165:         prefix = qNameAsString.substring(0, start);
 166:         qNameAsString = qNameAsString.substring(start + 1);
 167:       }
 168:     return new QName(namespaceUri, qNameAsString, prefix);
 169:   }
 170:   
 171: }