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Java > Open Source Codes > com > caucho > xpath > pattern > NodeListIterator


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.xpath.pattern;
30
31 import com.caucho.xpath.ExprEnvironment;
32
33 import org.w3c.dom.Node JavaDoc;
34 import org.w3c.dom.NodeList JavaDoc;
35
36 /**
37  * Iterates through matching nodes.
38  */
39 public class NodeListIterator extends NodeIterator {
40   protected NodeList JavaDoc _list;
41   protected int _position;
42
43   public NodeListIterator(ExprEnvironment env, NodeList JavaDoc list)
44   {
45     super(env);
46     
47     _list = list;
48   }
49   
50   /**
51    * Returns the current position.
52    */
53   public int getContextPosition()
54   {
55     return _position;
56   }
57   
58   /**
59    * Returns the current position.
60    */
61   public int getContextSize()
62   {
63     return _list.getLength();
64   }
65   
66   /**
67    * True if there's more data.
68    */
69   public boolean hasNext()
70   {
71     return _position < _list.getLength();
72   }
73   
74   /**
75    * Returns the next node.
76    */
77   public Node JavaDoc next()
78   {
79     return nextNode();
80   }
81   
82   /**
83    * Returns the next node.
84    */
85   public Node JavaDoc nextNode()
86   {
87     return _list.item(_position++);
88   }
89
90   /**
91    * clones the iterator
92    */
93   public Object JavaDoc clone()
94   {
95     NodeListIterator clone = new NodeListIterator(_env, _list);
96     
97     clone._position = _position;
98
99     return clone;
100   }
101 }
102
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