Source for gnu.xml.xpath.NodeTypeTest

   1: /* NodeTypeTest.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.namespace.QName;
  41: import org.w3c.dom.Node;
  42: 
  43: /**
  44:  * Tests whether a node is of a given type.
  45:  *
  46:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  47:  */
  48: public final class NodeTypeTest
  49:   extends Test
  50: {
  51: 
  52:   final short type;
  53:   final String data;
  54: 
  55:   public NodeTypeTest(short type)
  56:   {
  57:     this(type, null);
  58:   }
  59: 
  60:   public NodeTypeTest(short type, String data)
  61:   {
  62:     this.type = type;
  63:     this.data = data;
  64:   }
  65: 
  66:   public short getNodeType()
  67:   {
  68:     return type;
  69:   }
  70: 
  71:   public String getData()
  72:   {
  73:     return data;
  74:   }
  75: 
  76:   public boolean matches(Node node, int pos, int len)
  77:   {
  78:     short nodeType = node.getNodeType();
  79:     switch (nodeType)
  80:       {
  81:       case Node.ELEMENT_NODE:
  82:       case Node.ATTRIBUTE_NODE:
  83:       case Node.TEXT_NODE:
  84:       case Node.CDATA_SECTION_NODE:
  85:       case Node.COMMENT_NODE:
  86:       case Node.PROCESSING_INSTRUCTION_NODE:
  87:         if (type > 0)
  88:           {
  89:             if (nodeType != type)
  90:               {
  91:                 return false;
  92:               }
  93:             if (data != null && !data.equals(node.getNodeValue()))
  94:               {
  95:                 return false;
  96:               }
  97:           }
  98:         return true;
  99:       default:
 100:         // Not part of XPath data model
 101:         return false;
 102:       }
 103:   }
 104: 
 105:   public Test clone(Object context)
 106:   {
 107:     return new NodeTypeTest(type, data);
 108:   }
 109: 
 110:   public boolean references(QName var)
 111:   {
 112:     return false;
 113:   }
 114: 
 115:   public String toString()
 116:   {
 117:     switch (type)
 118:       {
 119:       case 0:
 120:         return "node()";
 121:       case Node.TEXT_NODE:
 122:         return "text()";
 123:       case Node.COMMENT_NODE:
 124:         return "comment()";
 125:       case Node.PROCESSING_INSTRUCTION_NODE:
 126:         if (data != null)
 127:           {
 128:             return "processing-instruction('" + data + "')";
 129:           }
 130:         return "processing-instruction()";
 131:       default:
 132:         throw new IllegalStateException();
 133:       }
 134:   }
 135:   
 136: }