/**
* Copyright (C) 2010 Orbeon, Inc.
*
* This program is free software; you can redistribute it and/or modify it under the terms of the
* GNU Lesser General Public License as published by the Free Software Foundation; either version
* 2.1 of the License, or (at your option) any later version.
*
* This program 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.
* See the GNU Lesser General Public License for more details.
*
* The full text of the license is available at http://www.gnu.org/copyleft/lesser.html
*/
package org.orbeon.oxf.xforms.function.xxforms;
import org.orbeon.oxf.xforms.function.XFormsFunction;
import org.orbeon.oxf.xml.TransformerUtils;
import org.orbeon.saxon.expr.Expression;
import org.orbeon.saxon.expr.XPathContext;
import org.orbeon.saxon.om.Item;
import org.orbeon.saxon.om.NodeInfo;
import org.orbeon.saxon.trans.XPathException;
/**
* xxf:mutable-document() takes a document as input and produces a mutable document as output, i.g. a document on
* which you can use xf:setvalue, for example.
*/
public class XXFormsMutableDocument extends XFormsFunction {
public Item evaluateItem(XPathContext xpathContext) throws XPathException {
// Get item
final Expression itemExpression = argument[0];
final Item item = itemExpression.evaluateItem(xpathContext);
if (item instanceof NodeInfo) {
return TransformerUtils.extractAsMutableDocument((NodeInfo) item);
} else {
return null;
}
}
}