001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.examples.impl;
016    
017    import org.apache.examples.Adder;
018    import org.apache.examples.Calculator;
019    import org.apache.examples.Divider;
020    import org.apache.examples.Multiplier;
021    import org.apache.examples.Subtracter;
022    
023    /**
024     * Implementation of the {@link org.apache.examples.Calculator}
025     * service interface. Acts as a facade, delegating each operation to other
026     * services.  The <code>hivemind.BuilderFactory</code>
027     *
028     * @author Howard Lewis Ship
029     */
030    public class CalculatorImpl implements Calculator
031    {
032        private Adder _adder;
033        private Subtracter _subtracter;
034        private Multiplier _multiplier;
035        private Divider _divider;
036    
037        public double add(double arg0, double arg1)
038        {
039            return _adder.add(arg0, arg1);
040        }
041    
042        public double subtract(double arg0, double arg1)
043        {
044            return _subtracter.subtract(arg0, arg1);
045        }
046    
047        public double multiply(double arg0, double arg1)
048        {
049            return _multiplier.multiply(arg0, arg1);
050        }
051    
052        public double divide(double arg0, double arg1)
053        {
054            return _divider.divide(arg0, arg1);
055        }
056    
057        public void setAdder(Adder adder)
058        {
059            _adder = adder;
060        }
061    
062        public void setDivider(Divider divider)
063        {
064            _divider = divider;
065        }
066    
067        public void setMultiplier(Multiplier multiplier)
068        {
069            _multiplier = multiplier;
070        }
071    
072        public void setSubtracter(Subtracter subtracter)
073        {
074            _subtracter = subtracter;
075        }
076    
077    }