/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.xpath.functions;
import com.caucho.util.L10N;
import com.caucho.xml.QAbstractNode;
import com.caucho.xpath.Expr;
import com.caucho.xpath.ExprEnvironment;
import com.caucho.xpath.XPathException;
import com.caucho.xpath.XPathParseException;
import com.caucho.xpath.expr.AbstractStringExpr;
import org.w3c.dom.Node;
/**
* Returns a relative URI against another.
*/
public class ResolveURI extends AbstractStringExpr {
private static final L10N L = new L10N(ResolveURI.class);
private Expr _relExpr;
private Expr _baseExpr;
public ResolveURI(Expr relExpr, Expr baseExpr)
throws XPathParseException
{
_relExpr = relExpr;
_baseExpr = baseExpr;
if (relExpr == null)
throw new XPathParseException(L.l("fn:resolve-uri(relative,[base])"));
}
/**
* Evaluates the expression as an string.
*
* @param node the current node
* @param env the variable environment.
*
* @return the string representation of the expression.
*/
public String evalString(Node node, ExprEnvironment env)
throws XPathException
{
String rel = _relExpr.evalString(node, env);
if (rel.startsWith("/") ||
rel.indexOf(':') > 0 && rel.indexOf(':') < '/')
return rel;
String base;
if (_baseExpr != null)
base = _baseExpr.evalString(node, env);
else
base = QAbstractNode.baseURI(node);
int last = base.lastIndexOf('/');
if (last < 0)
return rel;
else
return base.substring(0, last + 1) + rel;
}
public String toString()
{
if (_baseExpr != null)
return "fn:resolve-uri(" + _relExpr + "," + _baseExpr + ")";
else
return "fn:resolve-uri(" + _relExpr + ")";
}
}