/*
 * 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.fo.properties.NumberProperty;
import org.apache.fop.fo.properties.Property;


class FloorFunction extends FunctionBase {

    public int nbArgs() {
        return 1;
    }

    public Property eval(Property[] args,
                         PropertyInfo pInfo) throws PropertyException {
        Number dbl = args[0].getNumber();
        if (dbl == null) {
            throw new PropertyException("Non number operand to floor function");
        }
        return new NumberProperty(Math.floor(dbl.doubleValue()));
    }

}