1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.io.ByteArrayOutputStream;
26  
27  /**
28   * <a href="ByteArrayMaker.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author Harry Mark
31   *
32   */
33  public class ByteArrayMaker extends ByteArrayOutputStream {
34  
35      static boolean collect = false;
36  
37      static {
38          String collectString = System.getProperty(MakerStats.class.getName());
39  
40          if (collectString != null) {
41              if (collectString.equals("true")) {
42                  collect = true;
43              }
44          }
45      }
46  
47      static MakerStats stats = null;
48  
49      static {
50          if (collect) {
51              stats = new MakerStats(ByteArrayMaker.class.toString());
52          }
53      }
54  
55      static int defaultInitSize = 8000;
56  
57      static {
58          String defaultInitSizeString = System.getProperty(
59              ByteArrayMaker.class.getName() + ".initial.size");
60  
61          if (defaultInitSizeString != null) {
62              try {
63                  defaultInitSize = Integer.parseInt(defaultInitSizeString);
64              }
65              catch (Exception e) {
66                  e.printStackTrace();
67              }
68          }
69      }
70  
71      public static MakerStats getStatistics() {
72          return stats;
73      }
74  
75      public ByteArrayMaker() {
76          super(defaultInitSize);
77  
78          if (collect) {
79              _getInfo(new Throwable());
80          }
81      }
82  
83      public ByteArrayMaker(int size) {
84          super(size);
85  
86          if (collect) {
87              _getInfo(new Throwable());
88          }
89      }
90  
91      public byte[] toByteArray() {
92          if (collect) {
93              stats.add(_caller, _initSize, count);
94          }
95  
96          return super.toByteArray();
97      }
98  
99      public String toString() {
100         return super.toString();
101     }
102 
103     private void _getInfo(Throwable t) {
104         _initSize = buf.length;
105 
106         StackTraceElement[] elements = t.getStackTrace();
107 
108         if (elements.length > 1) {
109             StackTraceElement el = elements[1];
110 
111             _caller =
112                 el.getClassName() + StringPool.PERIOD + el.getMethodName() +
113                     StringPool.COLON + el.getLineNumber();
114         }
115     }
116 
117     private int _initSize;
118     private String _caller;
119 
120 }