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:
39: import org.w3c.dom.Node;
40:
41: /**
42: * Returns a relative URI against another.
43: */
44: public class ResolveURI extends AbstractStringExpr {
45: private static final L10N L = new L10N(ResolveURI.class);
46:
47: private Expr _relExpr;
48: private Expr _baseExpr;
49:
50: public ResolveURI(Expr relExpr, Expr baseExpr)
51: throws XPathParseException {
52: _relExpr = relExpr;
53: _baseExpr = baseExpr;
54:
55: if (relExpr == null)
56: throw new XPathParseException(L
57: .l("fn:resolve-uri(relative,[base])"));
58: }
59:
60: /**
61: * Evaluates the expression as an string.
62: *
63: * @param node the current node
64: * @param env the variable environment.
65: *
66: * @return the string representation of the expression.
67: */
68: public String evalString(Node node, ExprEnvironment env)
69: throws XPathException {
70: String rel = _relExpr.evalString(node, env);
71:
72: if (rel.startsWith("/") || rel.indexOf(':') > 0
73: && rel.indexOf(':') < '/')
74: return rel;
75:
76: String base;
77:
78: if (_baseExpr != null)
79: base = _baseExpr.evalString(node, env);
80: else
81: base = QAbstractNode.baseURI(node);
82:
83: int last = base.lastIndexOf('/');
84:
85: if (last < 0)
86: return rel;
87: else
88: return base.substring(0, last + 1) + rel;
89: }
90:
91: public String toString() {
92: if (_baseExpr != null)
93: return "fn:resolve-uri(" + _relExpr + "," + _baseExpr + ")";
94: else
95: return "fn:resolve-uri(" + _relExpr + ")";
96: }
97: }
|