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1   /*
2    * Copyright 2001-2004 The Apache Software Foundation
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.cache.remote;
17  
18  import java.io.Serializable;
19  import org.apache.commons.cache.CacheStat;
20  
21  /**
22   * tk.
23   *
24   * @version $Id: GetCacheStatRequest.java 155435 2005-02-26 13:17:27Z dirkv $
25   * @author Rodney Waldhoff
26   */
27  public class GetCacheStatRequest implements CacheRequest {
28    protected CacheStat[] _stats = null;
29  
30    public GetCacheStatRequest(CacheStat stat) {
31      this(new CacheStat[] { stat } );
32    }
33  
34    public GetCacheStatRequest(CacheStat[] stats) {
35      _stats = stats;
36    }
37  
38    public CacheStat[] getCacheStats() {
39      return _stats;
40    }
41  
42    public boolean equals(GetCacheStatRequest req) {
43      if(null == req) {
44        return false;
45      } else if(null == req.getCacheStats()) {
46        return (null == _stats);
47      } else if(null == _stats) {
48        return false;
49      } else if(req.getCacheStats().length != _stats.length) {
50        return false;
51      } else {
52        for(int i=0;i<_stats.length;i++) {
53          if(! (_stats[i] == null ? ( null == (req.getCacheStats())[i] ) : _stats[i].equals(req.getCacheStats()[i]) )) {
54            return false;
55          }
56        }
57        return true;
58      }
59    }
60  
61    public int hashCode() {
62      if(null == _stats) {
63        return this.getClass().getName().hashCode();
64      } else {
65        int hc = 0;
66        for(int i=0;i<_stats.length;i++) {
67          try {
68            hc ^= _stats[i].hashCode();
69          } catch(NullPointerException e) {
70            // ignored
71          }
72        }
73        return hc;
74      }
75    }
76  }