View Javadoc

1   /*
2    * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/pattern/NodeTypeTest.java,v 1.8 2006/02/05 21:47:42 elharo Exp $
3    * $Revision: 1.8 $
4    * $Date: 2006/02/05 21:47:42 $
5    *
6    * ====================================================================
7    *
8    * Copyright 2000-2002 bob mcwhirter & James Strachan.
9    * All rights reserved.
10   *
11   * Redistribution and use in source and binary forms, with or without
12   * modification, are permitted provided that the following conditions are
13   * met:
14   * 
15   *   * Redistributions of source code must retain the above copyright
16   *     notice, this list of conditions and the following disclaimer.
17   * 
18   *   * Redistributions in binary form must reproduce the above copyright
19   *     notice, this list of conditions and the following disclaimer in the
20   *     documentation and/or other materials provided with the distribution.
21   * 
22   *   * Neither the name of the Jaxen Project nor the names of its
23   *     contributors may be used to endorse or promote products derived 
24   *     from this software without specific prior written permission.
25   * 
26   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
29   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
30   * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37   *
38   * ====================================================================
39   * This software consists of voluntary contributions made by many 
40   * individuals on behalf of the Jaxen Project and was originally 
41   * created by bob mcwhirter <bob@werken.com> and 
42   * James Strachan <jstrachan@apache.org>.  For more information on the 
43   * Jaxen Project, please see <http://www.jaxen.org/>.
44   * 
45   * $Id: NodeTypeTest.java,v 1.8 2006/02/05 21:47:42 elharo Exp $
46   */
47  
48  package org.jaxen.pattern;
49  
50  import org.jaxen.Context;
51  
52  /*** <p><code>NodeTypeTest</code> matches if the node is of a certain type 
53    * such as element, attribute, comment, text, processing instruction and so forth.</p>
54    *
55    * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
56    * @version $Revision: 1.8 $
57    */
58  public class NodeTypeTest extends NodeTest {
59      
60      public static final NodeTypeTest DOCUMENT_TEST 
61          = new NodeTypeTest( DOCUMENT_NODE );
62      
63      public static final NodeTypeTest ELEMENT_TEST 
64          = new NodeTypeTest( ELEMENT_NODE );
65      
66      public static final NodeTypeTest ATTRIBUTE_TEST 
67          = new NodeTypeTest( ATTRIBUTE_NODE );
68      
69      public static final NodeTypeTest COMMENT_TEST 
70          = new NodeTypeTest( COMMENT_NODE );
71      
72      public static final NodeTypeTest TEXT_TEST 
73          = new NodeTypeTest( TEXT_NODE );
74      
75      public static final NodeTypeTest PROCESSING_INSTRUCTION_TEST 
76          = new NodeTypeTest( PROCESSING_INSTRUCTION_NODE );
77      
78      public static final NodeTypeTest NAMESPACE_TEST 
79          = new NodeTypeTest( NAMESPACE_NODE );
80      
81      
82      private short nodeType;
83      
84      public NodeTypeTest(short nodeType)   
85      {
86          this.nodeType = nodeType;
87      }
88          
89      /*** @return true if the pattern matches the given node
90        */
91      public boolean matches( Object node, Context context ) 
92      {
93          return nodeType == context.getNavigator().getNodeType( node );
94      }
95      
96      public double getPriority() 
97      {
98          return -0.5;
99      }
100 
101 
102     public short getMatchType() 
103     {
104         return nodeType;
105     }
106     
107     public String getText() 
108     {
109         switch (nodeType) 
110         {
111             case ELEMENT_NODE:
112                 return "child()";
113             case ATTRIBUTE_NODE:
114                 return "@*";
115             case NAMESPACE_NODE:
116                 return "namespace()";
117             case DOCUMENT_NODE:
118                 return "/";
119             case COMMENT_NODE:
120                 return "comment()";
121             case TEXT_NODE:
122                 return "text()";
123             case PROCESSING_INSTRUCTION_NODE:
124                 return "processing-instruction()";
125         }
126         return "";
127     }
128     
129     public String toString()
130     {
131         return super.toString() + "[ type: " + nodeType + " ]";
132     }
133 }