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Java > Open Source Codes > com > caucho > jcr > base > BaseNodeIterator


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  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.jcr.base;
31
32 import javax.jcr.Node;
33 import javax.jcr.NodeIterator;
34
35 /**
36  * Iterates over an array array of base nodes.
37  */
38 public class BaseNodeIterator implements NodeIterator {
39   private BaseNode []_nodes;
40   private int _index;
41
42   public BaseNodeIterator(BaseNode []nodes)
43   {
44     _nodes = nodes;
45   }
46   /**
47    * Returns the next node.
48    */
49   public Node nextNode()
50   {
51     if (_index < _nodes.length)
52       return _nodes[_index++];
53     else
54       return null;
55   }
56
57   //
58 // javax.jcr.RangeIterator
59 //
60
61   /**
62    * Skips the next 'n' nodes.
63    */
64   public void skip(long skipNum)
65   {
66     _index += skipNum;
67   }
68
69   /**
70    * Returns the total number of nodes.
71    */
72   public long getSize()
73   {
74     return _nodes.length;
75   }
76
77   /**
78    * Returns the current position.
79    */
80   public long getPosition()
81   {
82     return _index;
83   }
84
85   //
86 // java.util.iterator
87 //
88
89   /**
90    * Returns the next node.
91    */
92   public Object JavaDoc next()
93   {
94     return nextNode();
95   }
96
97   /**
98    * Returns true if there are more nodes.
99    */
100   public boolean hasNext()
101   {
102     return _index < _nodes.length;
103   }
104
105   /**
106    * Removes the current item.
107    */
108   public void remove()
109   {
110     throw new UnsupportedOperationException JavaDoc(getClass().getName());
111   }
112 }
113
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