1
19
20 package com.liferay.portal.kernel.util;
21
22 import java.io.ByteArrayOutputStream;
23
24
30 public class ByteArrayMaker extends ByteArrayOutputStream {
31
32 static boolean collect = false;
33
34 static {
35 String collectString = System.getProperty(MakerStats.class.getName());
36
37 if (collectString != null) {
38 if (collectString.equals("true")) {
39 collect = true;
40 }
41 }
42 }
43
44 static MakerStats stats = null;
45
46 static {
47 if (collect) {
48 stats = new MakerStats(ByteArrayMaker.class.toString());
49 }
50 }
51
52 static int defaultInitSize = 8000;
53
54 static {
55 String defaultInitSizeString = System.getProperty(
56 ByteArrayMaker.class.getName() + ".initial.size");
57
58 if (defaultInitSizeString != null) {
59 try {
60 defaultInitSize = Integer.parseInt(defaultInitSizeString);
61 }
62 catch (Exception e) {
63 e.printStackTrace();
64 }
65 }
66 }
67
68 public static MakerStats getStatistics() {
69 return stats;
70 }
71
72 public ByteArrayMaker() {
73 super(defaultInitSize);
74
75 if (collect) {
76 _getInfo(new Throwable());
77 }
78 }
79
80 public ByteArrayMaker(int size) {
81 super(size);
82
83 if (collect) {
84 _getInfo(new Throwable());
85 }
86 }
87
88 public byte[] toByteArray() {
89 if (collect) {
90 stats.add(_caller, _initSize, count);
91 }
92
93 return super.toByteArray();
94 }
95
96 public String toString() {
97 return super.toString();
98 }
99
100 private void _getInfo(Throwable t) {
101 _initSize = buf.length;
102
103 StackTraceElement[] elements = t.getStackTrace();
104
105 if (elements.length > 1) {
106 StackTraceElement el = elements[1];
107
108 _caller =
109 el.getClassName() + StringPool.PERIOD + el.getMethodName() +
110 StringPool.COLON + el.getLineNumber();
111 }
112 }
113
114 private int _initSize;
115 private String _caller;
116
117 }