Source for javax.xml.namespace.QName

   1: /* QName.java - An XML qualified name.
   2:    Copyright (C) 2004,2005,2006 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 gnu.java.lang.CPStringBuilder;
  42: 
  43: import java.io.Serializable;
  44: 
  45: import javax.xml.XMLConstants;
  46: 
  47: /**
  48:  * An XML
  49:  * <a href='http://www.w3.org/TR/REC-xml-names/#ns-qualnames'>qualified name</a>.
  50:  *
  51:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  52:  * @since 1.3
  53:  */
  54: public class QName implements Serializable
  55: {
  56:   private static final long serialVersionUID = 4418622981026545151L;
  57: 
  58:   private final String namespaceURI;
  59:   private final String localPart;
  60:   private final String prefix;
  61:   private transient String qName;
  62:   transient int hashCode = -1;
  63: 
  64:   public QName(String namespaceURI, String localPart)
  65:   {
  66:     this(namespaceURI, localPart, null);
  67:   }
  68: 
  69:   public QName(String namespaceURI, String localPart, String prefix)
  70:   {
  71:     if (namespaceURI == null)
  72:       namespaceURI = XMLConstants.NULL_NS_URI;
  73:     if (localPart == null)
  74:       throw new IllegalArgumentException();
  75:     if (prefix == null)
  76:       prefix = XMLConstants.DEFAULT_NS_PREFIX;
  77:     else
  78:       {
  79:         if (XMLConstants.XML_NS_PREFIX.equals(prefix))
  80:           namespaceURI = XMLConstants.XML_NS_URI;
  81:         else if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix))
  82:           namespaceURI = XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
  83:       }
  84:     this.namespaceURI = namespaceURI;
  85:     this.localPart = localPart;
  86:     this.prefix = prefix;
  87:   }
  88: 
  89:   public QName(String localPart)
  90:   {
  91:     this(null, localPart, null);
  92:   }
  93: 
  94:   public String getNamespaceURI()
  95:   {
  96:     return namespaceURI;
  97:   }
  98: 
  99:   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: }