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    
018    package org.apache.commons.proxy.factory.util;
019    
020    import java.lang.reflect.Method;
021    import java.util.Arrays;
022    import java.util.List;
023    
024    /**
025     * A class for capturing the signature of a method (its name and parameter types).
026     * 
027     * @author James Carman
028     * @since 1.0
029     */
030    public class MethodSignature
031    {
032    //----------------------------------------------------------------------------------------------------------------------
033    // Fields
034    //----------------------------------------------------------------------------------------------------------------------
035    
036        private final String name;
037        private final List parameterTypes;
038    
039    //----------------------------------------------------------------------------------------------------------------------
040    // Constructors
041    //----------------------------------------------------------------------------------------------------------------------
042    
043        public MethodSignature( Method method )
044        {
045            this.name = method.getName();
046            this.parameterTypes = Arrays.asList( method.getParameterTypes() );
047        }
048    
049    //----------------------------------------------------------------------------------------------------------------------
050    // Canonical Methods
051    //----------------------------------------------------------------------------------------------------------------------
052    
053        public boolean equals( Object o )
054        {
055            if( this == o )
056            {
057                return true;
058            }
059            if( o == null || getClass() != o.getClass() )
060            {
061                return false;
062            }
063            final MethodSignature that = ( MethodSignature ) o;
064            if( !name.equals( that.name ) )
065            {
066                return false;
067            }
068            if( !parameterTypes.equals( that.parameterTypes ) )
069            {
070                return false;
071            }
072            return true;
073        }
074    
075        public int hashCode()
076        {
077            int result;
078            result = name.hashCode();
079            result = 29 * result + parameterTypes.hashCode();
080            return result;
081        }
082    }
083