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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   https://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.commons.compress.harmony.unpack200.bytecode;
20  
21  import java.util.List;
22  
23  /**
24   * Method constant pool entry.
25   */
26  public class CPMethod extends CPMember {
27  
28      private boolean hashCodeComputed;
29  
30      private int cachedHashCode;
31  
32      public CPMethod(final CPUTF8 name, final CPUTF8 descriptor, final long flags, final List<Attribute> attributes) {
33          super(name, descriptor, flags, attributes);
34      }
35  
36      private void generateHashCode() {
37          hashCodeComputed = true;
38          final int PRIME = 31;
39          int result = 1;
40          result = PRIME * result + name.hashCode();
41          result = PRIME * result + descriptor.hashCode();
42          cachedHashCode = result;
43      }
44  
45      @Override
46      public int hashCode() {
47          if (!hashCodeComputed) {
48              generateHashCode();
49          }
50          return cachedHashCode;
51      }
52  
53      @Override
54      public String toString() {
55          return "Method: " + name + "(" + descriptor + ")";
56      }
57  
58  }