001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.jxpath.ri.compiler;
018
019import org.apache.commons.jxpath.ri.EvalContext;
020import org.apache.commons.jxpath.ri.InfoSetUtil;
021
022/**
023 * Implementation of {@link Expression} for the operation "mod".
024 *
025 * @author Dmitri Plotnikov
026 * @version $Revision: 652845 $ $Date: 2008-05-02 13:46:46 -0400 (Fri, 02 May 2008) $
027 */
028public class CoreOperationMod extends CoreOperation {
029
030    /**
031     * Create a new CoreOperationMod.
032     * @param arg1 dividend
033     * @param arg2 divisor
034     */
035    public CoreOperationMod(Expression arg1, Expression arg2) {
036        super(new Expression[] { arg1, arg2 });
037    }
038
039    public Object computeValue(EvalContext context) {
040        long l = (long) InfoSetUtil.doubleValue(args[0].computeValue(context));
041        long r = (long) InfoSetUtil.doubleValue(args[1].computeValue(context));
042        return new Double(l % r);
043    }
044
045    protected int getPrecedence() {
046        return MULTIPLY_PRECEDENCE;
047    }
048
049    protected boolean isSymmetric() {
050        return false;
051    }
052
053    public String getSymbol() {
054        return "mod";
055    }
056}