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: public class NamespacePattern extends AbstractPattern {
37: private String _prefix;
38: private int _nodeType;
39:
40: public NamespacePattern(AbstractPattern parent, String prefix,
41: int nodeType) {
42: super (parent);
43:
44: _prefix = prefix;
45: _nodeType = nodeType;
46:
47: if (parent == null)
48: throw new RuntimeException();
49: }
50:
51: /**
52: * The node-type priority is less than nodes.
53: */
54: public double getPriority() {
55: return -0.25;
56: }
57:
58: /**
59: * Matches if the namespace matches and the local name matches.
60: *
61: * @param node the current node
62: * @param env the variable environment
63: *
64: * @return true if the node matches
65: */
66: public boolean match(Node node, ExprEnvironment env)
67: throws XPathException {
68: if (node == null)
69: return false;
70:
71: if (node.getNodeType() != _nodeType)
72: return false;
73:
74: String prefix = node.getPrefix();
75:
76: if (!(prefix == _prefix || (prefix != null && prefix
77: .equals(_prefix))))
78: return false;
79:
80: return _parent.match(node, env);
81: }
82:
83: public String toString() {
84: switch (_nodeType) {
85: case Node.ATTRIBUTE_NODE:
86: return _parent.toString() + "@" + _prefix + ":*";
87: case Node.ELEMENT_NODE:
88: return _parent.toString() + _prefix + ":*";
89:
90: default:
91: return super.toString();
92: }
93: }
94: }
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