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/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo.expr;
import org.apache.fop.fo.properties.Property;
/**
* Class modelling the from-table-column Property Value function. See Sec.
* 5.10.4 of the XSL-FO spec.
*/
public class FromTableColumnFunction extends FunctionBase {
/**
* @return 1 (maximum arguments for the from-table-column function)
*/
public int nbArgs() {
return 1;
}
/**
*
* @param args array of arguments, which should either be empty, or the
* first of which should contain an NCName corresponding to a property name
* @param pInfo PropertyInfo object to be evaluated
* @return the Property corresponding to the property name specified, or, if
* none, for the property for which the expression is being evaluated
* @throws PropertyException for incorrect arguments, and (for now) in all
* cases, because this function is not implemented
*/
public Property eval(Property[] args,
PropertyInfo pInfo) throws PropertyException {
String propName = args[0].getString();
if (propName == null) {
//TODO Determine on which property this method was called.
}
throw new PropertyException("The from-table-column() function is not implemented, yet!");
}
}
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