Source for gnu.xml.xpath.NameTest

   1: /* NameTest.java -- 
   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: package gnu.xml.xpath;
  39: 
  40: import javax.xml.XMLConstants;
  41: import javax.xml.namespace.QName;
  42: import org.w3c.dom.Node;
  43: 
  44: /**
  45:  * Tests whether a node has the specified name.
  46:  *
  47:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  48:  */
  49: public final class NameTest
  50:   extends Test
  51: {
  52: 
  53:   final QName qName;
  54:   final boolean anyLocalName;
  55:   final boolean any;
  56: 
  57:   public NameTest(QName qName, boolean anyLocalName, boolean any)
  58:   {
  59:     this.anyLocalName = anyLocalName;
  60:     this.any = any;
  61:     this.qName = qName;
  62:   }
  63: 
  64:   public boolean matchesAny()
  65:   {
  66:     return any;
  67:   }
  68: 
  69:   public boolean matchesAnyLocalName()
  70:   {
  71:     return anyLocalName;
  72:   }
  73: 
  74:   public boolean matches(Node node, int pos, int len)
  75:   {
  76:     switch (node.getNodeType())
  77:       {
  78:       case Node.ATTRIBUTE_NODE:
  79:         // Do not match namespace attributes
  80:         String uri = node.getNamespaceURI();
  81:         if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(uri) ||
  82:             XMLConstants.XMLNS_ATTRIBUTE.equals(node.getPrefix()) ||
  83:             XMLConstants.XMLNS_ATTRIBUTE.equals(node.getNodeName()))
  84:           {
  85:             return false;
  86:           }
  87:         // Fall through
  88:       case Node.ELEMENT_NODE:
  89:         break;
  90:       default:
  91:         return false;
  92:       }
  93:     if (any)
  94:       {
  95:         return true;
  96:       }
  97:     String uri = qName.getNamespaceURI();
  98:     String nodeUri = node.getNamespaceURI();
  99:     String nodeLocalName = node.getLocalName();
 100:     if (nodeLocalName != null && !equal(uri, nodeUri))
 101:       {
 102:         return false;
 103:       }
 104:     if (anyLocalName)
 105:       {
 106:         return true;
 107:       }
 108:     String localName = qName.getLocalPart();
 109:     if (nodeLocalName != null)
 110:       {
 111:         nodeLocalName = node.getNodeName();
 112:       }
 113:     return (localName.equals(nodeLocalName));
 114:   }
 115: 
 116:   final boolean equal(String s1, String s2)
 117:   {
 118:     return (((s1 == null || s1.length() == 0) &&
 119:              (s2 == null || s2.length() == 0)) ||
 120:             s1 != null && s1.equals(s2));
 121:   }
 122: 
 123:   public Test clone(Object context)
 124:   {
 125:     return new NameTest(qName, anyLocalName, any);
 126:   }
 127: 
 128:   public boolean references(QName var)
 129:   {
 130:     return false;
 131:   }
 132: 
 133:   public String toString ()
 134:   {
 135:     if (any)
 136:       {
 137:         return "*";
 138:       }
 139:     return qName.toString();
 140:   }
 141:   
 142: }