/*
* 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.expr;
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.pattern.NodeIterator;
import org.w3c.dom.Node;
/**
* Contains the builtin XPath functions.
*/
public class Functions {
static final L10N L = new L10N(Functions.class);
private Functions() {}
/**
* Returns the fn:base-uri value.
*/
public static class BaseURI extends AbstractStringExpr {
private Expr _expr;
public BaseURI(Expr expr)
throws XPathParseException
{
_expr = expr;
if (expr == null)
throw new XPathParseException(L.l("fn:base-uri requires a single argument"));
}
/**
* 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
{
NodeIterator iter = _expr.evalNodeSet(node, env);
Node result = iter.next();
return QAbstractNode.baseURI(result);
}
public String toString()
{
return "fn:base-uri(" + _expr + ")";
}
}
}