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Java > Open Source Codes > org > jaxen > expr > DefaultProcessingInstructionNodeStep


1 /*
2  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultProcessingInstructionNodeStep.java,v 1.12 2005/03/21 22:39:16 elharo Exp $
3  * $Revision: 1.12 $
4  * $Date: 2005/03/21 22:39:16 $
5  *
6  * ====================================================================
7  *
8  * Copyright (C) 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
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions, and the following disclaimer.
17  *
18  * 2. Redistributions in binary form must reproduce the above copyright
19  * notice, this list of conditions, and the disclaimer that follows
20  * these conditions in the documentation and/or other materials
21  * provided with the distribution.
22  *
23  * 3. The name "Jaxen" must not be used to endorse or promote products
24  * derived from this software without prior written permission. For
25  * written permission, please contact license@jaxen.org.
26  *
27  * 4. Products derived from this software may not be called "Jaxen", nor
28  * may "Jaxen" appear in their name, without prior written permission
29  * from the Jaxen Project Management (pm@jaxen.org).
30  *
31  * In addition, we request (but do not require) that you include in the
32  * end-user documentation provided with the redistribution and/or in the
33  * software itself an acknowledgement equivalent to the following:
34  * "This product includes software developed by the
35  * Jaxen Project (http://www.jaxen.org/)."
36  * Alternatively, the acknowledgment may be graphical using the logos
37  * available at http://www.jaxen.org/
38  *
39  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42  * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
43  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
48  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
49  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * ====================================================================
53  * This software consists of voluntary contributions made by many
54  * individuals on behalf of the Jaxen Project and was originally
55  * created by bob mcwhirter <bob@werken.com> and
56  * James Strachan <jstrachan@apache.org>. For more information on the
57  * Jaxen Project, please see <http://www.jaxen.org/>.
58  *
59  * $Id: DefaultProcessingInstructionNodeStep.java,v 1.12 2005/03/21 22:39:16 elharo Exp $
60  */
61
62
63
64 package org.jaxen.expr;
65
66 import org.jaxen.ContextSupport;
67 import org.jaxen.Navigator;
68 import org.jaxen.expr.iter.IterableAxis;
69
70 public class DefaultProcessingInstructionNodeStep extends DefaultStep
71     implements ProcessingInstructionNodeStep
72 {
73     private String JavaDoc name;
74
75     public DefaultProcessingInstructionNodeStep(IterableAxis axis,
76                                                 String JavaDoc name,
77                                                 PredicateSet predicateSet)
78     {
79         super( axis, predicateSet );
80
81         this.name = name;
82     }
83
84     public String JavaDoc getName()
85     {
86         return this.name;
87     }
88
89     public boolean matches(Object JavaDoc node,
90                            ContextSupport support)
91     {
92         Navigator nav = support.getNavigator();
93
94         boolean isPi = nav.isProcessingInstruction( node );
95
96         if ( isPi )
97         {
98             String JavaDoc name = getName();
99
100             if ( name == null || name.length() == 0 )
101             {
102                 return true;
103             }
104             else
105             {
106                 return name.equals( nav.getProcessingInstructionTarget( node ) );
107             }
108         }
109
110         return false;
111     }
112     
113     public void accept(Visitor visitor)
114     {
115         visitor.visit(this);
116     }
117 }
118
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