1 /*
2  * $Header: /cvsroot/jaxen/jaxen/src/java/main/org/jaxen/expr/DefaultStep.java,v 1.5 2002/04/26 17:17:34 jstrachan Exp $
3  * $Revision: 1.5 $
4  * $Date: 2002/04/26 17:17:34 $
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: DefaultStep.java,v 1.5 2002/04/26 17:17:34 jstrachan Exp $
60  */
61 
62 
63 
64 package org.jaxen.expr;
65 
66 import org.jaxen.Context;
67 import org.jaxen.ContextSupport;
68 import org.jaxen.UnsupportedAxisException;
69 import org.jaxen.expr.iter.IterableAxis;
70 
71 import org.jaxen.util.LinkedIterator;
72 
73 import org.saxpath.Axis;
74 
75 import java.util.Set;
76 import java.util.TreeSet;
77 import java.util.List;
78 import java.util.Iterator;
79 
80 public abstract class DefaultStep implements Step
81 {
82     private IterableAxis axis;
83     private PredicateSet predicates;
84 
DefaultStep(IterableAxis axis)85     public DefaultStep(IterableAxis axis)
86     {
87         this.axis       = axis;
88         this.predicates = new PredicateSet();
89     }
90 
addPredicate(Predicate predicate)91     public void addPredicate(Predicate predicate)
92     {
93         this.predicates.addPredicate( predicate );
94     }
95 
getPredicates()96     public List getPredicates()
97     {
98         return this.predicates.getPredicates();
99     }
100 
getPredicateSet()101     public PredicateSet getPredicateSet()
102     {
103         return this.predicates;
104     }
105 
getAxis()106     public int getAxis()
107     {
108         return this.axis.value();
109     }
110 
getIterableAxis()111     public IterableAxis getIterableAxis()
112     {
113         return this.axis;
114     }
115 
getAxisName()116     public String getAxisName()
117     {
118         return Axis.lookup( getAxis() );
119     }
120 
getText()121     public String getText()
122     {
123         return this.predicates.getText();
124     }
125 
toString()126     public String toString()
127     {
128         return getIterableAxis() + " " + super.toString();
129     }
130 
simplify()131     public void simplify()
132     {
133         this.predicates.simplify();
134     }
135 
axisIterator(Object contextNode, ContextSupport support)136     public Iterator axisIterator(Object contextNode,
137                                  ContextSupport support) throws UnsupportedAxisException
138     {
139         return getIterableAxis().iterator( contextNode,
140                                            support );
141     }
142 }
143