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 */
017
018package org.apache.commons.jxpath.ri.compiler;
019
020import org.apache.commons.jxpath.ri.EvalContext;
021import org.apache.commons.jxpath.ri.InfoSetUtil;
022
023/**
024 * Implementation of {@link Expression} for the operation "*".
025 */
026public class CoreOperationMultiply extends CoreOperation {
027
028    /**
029     * Constructs a new CoreOperationMultiply.
030     *
031     * @param arg1 factor 1
032     * @param arg2 factor 2
033     */
034    public CoreOperationMultiply(final Expression arg1, final Expression arg2) {
035        super(new Expression[] { arg1, arg2 });
036    }
037
038    @Override
039    public Object computeValue(final EvalContext context) {
040        final double l = InfoSetUtil.doubleValue(args[0].computeValue(context));
041        final double r = InfoSetUtil.doubleValue(args[1].computeValue(context));
042        return Double.valueOf(l * r);
043    }
044
045    @Override
046    protected int getPrecedence() {
047        return MULTIPLY_PRECEDENCE;
048    }
049
050    @Override
051    public String getSymbol() {
052        return "*";
053    }
054
055    @Override
056    protected boolean isSymmetric() {
057        return true;
058    }
059}