01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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: import com.caucho.xpath.XPathException;
33:
34: import org.w3c.dom.Node;
35:
36: import java.util.logging.Level;
37:
38: /**
39: * Uses the axis to select new nodes.
40: */
41: public class AttributeIterator extends AxisIterator {
42: private AttributeIterator(ExprEnvironment env) {
43: super (env);
44: }
45:
46: /**
47: * Creates the new AxisIterator.
48: *
49: * @param parentIter the parent iterator
50: * @param axis the owning axis
51: * @param node the first node
52: * @param env the xpath environment
53: * @param context the context node
54: * @param match the node matching pattern
55: */
56: public AttributeIterator(NodeIterator parentIter,
57: AbstractPattern axis, Node node, ExprEnvironment env,
58: AbstractPattern match) throws XPathException {
59: super (parentIter, axis, node, env, match);
60: }
61:
62: /**
63: * Returns the next selected node.
64: */
65: public SelectedNode nextSelectedNode() throws XPathException {
66: Node node = nextNode();
67:
68: return node == null ? null : new SelectedAttribute(node);
69: }
70:
71: public Object clone() {
72: try {
73: AttributeIterator iter = new AttributeIterator(_env);
74:
75: iter._position = _position;
76: if (_parentIter != null)
77: iter._parentIter = (NodeIterator) _parentIter.clone();
78: iter._axis = _axis;
79: iter._node = _node;
80: iter._env = _env; // clone?
81: iter._match = _match;
82:
83: return iter;
84: } catch (Exception e) {
85: log.log(Level.FINE, e.toString(), e);
86:
87: return null;
88: }
89: }
90:
91: public String toString() {
92: return "AttributeIterator[axis:" + _axis + ",match:" + _match
93: + "]";
94: }
95: }
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