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.expr;
30:
31: import com.caucho.util.L10N;
32: import com.caucho.xml.QAbstractNode;
33: import com.caucho.xpath.Expr;
34: import com.caucho.xpath.ExprEnvironment;
35: import com.caucho.xpath.XPathException;
36: import com.caucho.xpath.XPathParseException;
37: import com.caucho.xpath.pattern.NodeIterator;
38:
39: import org.w3c.dom.Node;
40:
41: /**
42: * Contains the builtin XPath functions.
43: */
44: public class Functions {
45: static final L10N L = new L10N(Functions.class);
46:
47: private Functions() {
48: }
49:
50: /**
51: * Returns the fn:base-uri value.
52: */
53: public static class BaseURI extends AbstractStringExpr {
54: private Expr _expr;
55:
56: public BaseURI(Expr expr) throws XPathParseException {
57: _expr = expr;
58:
59: if (expr == null)
60: throw new XPathParseException(L
61: .l("fn:base-uri requires a single argument"));
62: }
63:
64: /**
65: * Evaluates the expression as an string.
66: *
67: * @param node the current node
68: * @param env the variable environment.
69: *
70: * @return the string representation of the expression.
71: */
72: public String evalString(Node node, ExprEnvironment env)
73: throws XPathException {
74: NodeIterator iter = _expr.evalNodeSet(node, env);
75:
76: Node result = iter.next();
77:
78: return QAbstractNode.baseURI(result);
79: }
80:
81: public String toString() {
82: return "fn:base-uri(" + _expr + ")";
83: }
84: }
85: }
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