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/*
* Copyright 1999-2004 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.datatypes.Numeric;
import org.apache.fop.fo.properties.Property;
/**
* Class for managing the "max" Number Function. See Sec. 5.10.1 in the XSL-FO
* standard.
*/
public class MaxFunction extends FunctionBase {
/**
* @return 2 (the number of arguments required for the max function)
*/
public int nbArgs() {
return 2;
}
/**
* Handle "numerics" if no proportional/percent parts
* @param args array of arguments to be processed
* @param pInfo PropertyInfo to be processed
* @return the maximum of the two args elements passed
* @throws PropertyException for invalid operands
*/
public Property eval(Property[] args,
PropertyInfo pInfo) throws PropertyException {
Numeric n1 = args[0].getNumeric();
Numeric n2 = args[1].getNumeric();
if (n1 == null || n2 == null) {
throw new PropertyException("Non numeric operands to max function");
}
return (Property) NumericOp.max(n1, n2);
}
}
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