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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.proxy.factory.util;
19  
20  import java.lang.reflect.Method;
21  import java.util.Arrays;
22  import java.util.List;
23  
24  /**
25   * A class for capturing the signature of a method (its name and parameter types).
26   * 
27   * @author James Carman
28   * @since 1.0
29   */
30  public class MethodSignature
31  {
32  //----------------------------------------------------------------------------------------------------------------------
33  // Fields
34  //----------------------------------------------------------------------------------------------------------------------
35  
36      private final String name;
37      private final List parameterTypes;
38  
39  //----------------------------------------------------------------------------------------------------------------------
40  // Constructors
41  //----------------------------------------------------------------------------------------------------------------------
42  
43      public MethodSignature( Method method )
44      {
45          this.name = method.getName();
46          this.parameterTypes = Arrays.asList( method.getParameterTypes() );
47      }
48  
49  //----------------------------------------------------------------------------------------------------------------------
50  // Canonical Methods
51  //----------------------------------------------------------------------------------------------------------------------
52  
53      public boolean equals( Object o )
54      {
55          if( this == o )
56          {
57              return true;
58          }
59          if( o == null || getClass() != o.getClass() )
60          {
61              return false;
62          }
63          final MethodSignature that = ( MethodSignature ) o;
64          if( !name.equals( that.name ) )
65          {
66              return false;
67          }
68          if( !parameterTypes.equals( that.parameterTypes ) )
69          {
70              return false;
71          }
72          return true;
73      }
74  
75      public int hashCode()
76      {
77          int result;
78          result = name.hashCode();
79          result = 29 * result + parameterTypes.hashCode();
80          return result;
81      }
82  }
83