/**
* 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;
import org.orbeon.oxf.common.ValidationException;
import org.orbeon.oxf.xml.dom4j.LocationData;
import org.orbeon.saxon.expr.XPathContext;
import org.orbeon.saxon.om.Item;
import org.orbeon.saxon.trans.XPathException;
import org.orbeon.saxon.value.Int64Value;
/**
* XForms index() function.
*
* 7.8.5 The index() Function
*/
public class Index extends XFormsFunction {
public Item evaluateItem(XPathContext xpathContext) throws XPathException {
final String repeatId = argument[0].evaluateAsString(xpathContext).toString();
return findIndexForRepeatId(xpathContext, repeatId);
}
protected Item findIndexForRepeatId(XPathContext xpathContext, String repeatStaticId) {
final int index = XFormsFunction.context().container().getRepeatIndex(getSourceEffectiveId(), repeatStaticId);
if (index == -1) {
// Throw runtime exception
final String message = "Function index uses repeat id '" + repeatStaticId + "' which is not in scope";
throw new ValidationException(message, new LocationData(getSystemId(), getLineNumber(), getColumnNumber()));
} else {
// Return value found
return new Int64Value(index);
}
}
}