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