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1
22
23
24 package com.mchange.v1.jvm;
25
26 public final class InternalNameUtils
27 {
28 public static String  dottifySlashesAndDollarSigns(String str)
29 { return _dottifySlashesAndDollarSigns( str ).toString(); }
30
31 public static String decodeType(String internalrep) throws TypeFormatException
32 { return _decodeType(internalrep).toString(); }
33
34 public static String decodeTypeList(String internalrep) throws TypeFormatException
35 {
36 StringBuffer sb = new StringBuffer (64);
37 _decodeTypeList(internalrep, 0, sb);
38 return sb.toString();
39 }
40
41 public static boolean isPrimitive(char rep)
42 {
43 return (rep == 'Z' ||
44 rep == 'B' ||
45 rep == 'C' ||
46 rep == 'S' ||
47 rep == 'I' ||
48 rep == 'J' ||
49 rep == 'F' ||
50 rep == 'D' ||
51 rep == 'V');
52 }
53
54 private static void _decodeTypeList(String typeList, int start_pos, StringBuffer appendTo) throws TypeFormatException
55 {
56 if (appendTo.length() != 0)
57 appendTo.append(' ');
58
59 char c = typeList.charAt(start_pos);
60 if (isPrimitive(c))
61 {
62 appendTo.append( _decodeType( typeList.substring(start_pos, start_pos + 1) ) );
63 ++start_pos;
64 }
65 else
66 {
67 int stop_index;
68
69 if (c == '[')
70 {
71 int finger = start_pos + 1;
72 while (typeList.charAt(finger) == '[')
73 ++finger;
74 if (typeList.charAt(finger) == 'L')
75 {
76 ++finger;
77 while (typeList.charAt( finger ) != ';')
78 ++finger;
79 }
80 stop_index = finger;
81 }
82 else
83 {
84 stop_index = typeList.indexOf(';', start_pos);
85 if (stop_index < 0)
86 throw new TypeFormatException(typeList.substring(start_pos) + " is neither a primitive nor semicolon terminated!");
87 }
88
89 appendTo.append( _decodeType( typeList.substring( start_pos, (start_pos = stop_index + 1) ) ) );
90 }
91 if (start_pos < typeList.length())
92 {
93 appendTo.append(',');
94 _decodeTypeList(typeList, start_pos, appendTo);
95 }
96 }
97
98 private static StringBuffer _decodeType(String type) throws TypeFormatException
99 {
100
102 int array_level = 0;
103 StringBuffer out;
104
105 char c = type.charAt(0);
106
107 switch (c)
108 {
109 case 'Z':
110 out = new StringBuffer ("boolean");
111 break;
112 case 'B':
113 out = new StringBuffer ("byte");
114 break;
115 case 'C':
116 out = new StringBuffer ("char");
117 break;
118 case 'S':
119 out = new StringBuffer ("short");
120 break;
121 case 'I':
122 out = new StringBuffer ("int");
123 break;
124 case 'J':
125 out = new StringBuffer ("long");
126 break;
127 case 'F':
128 out = new StringBuffer ("float");
129 break;
130 case 'D':
131 out = new StringBuffer ("double");
132 break;
133 case 'V':
134 out = new StringBuffer ("void");
135 break;
136 case '[':
137 ++array_level;
138 out = _decodeType(type.substring(1));
139 break;
140 case 'L':
141 out = _decodeSimpleClassType(type);
142 break;
143 default:
144 throw new TypeFormatException(type + " is not a valid inernal type name.");
145 }
146 for (int i = 0; i < array_level; ++i)
147 out.append("[]");
148 return out;
149 }
150
151 private static StringBuffer _decodeSimpleClassType(String type) throws TypeFormatException
152 {
153 int len = type.length();
154 if (type.charAt(0) != 'L' || type.charAt( len - 1 ) != ';')
155 throw new TypeFormatException(type + " is not a valid representation of a simple class type.");
156
157 return _dottifySlashesAndDollarSigns( type.substring(1, len - 1) );
158 }
159
160 private static StringBuffer _dottifySlashesAndDollarSigns(String s)
161 {
162 StringBuffer sb = new StringBuffer ( s );
163 for (int i = 0, len = sb.length(); i < len; ++i)
164 {
165 char c = sb.charAt(i);
166 if ( c == '/' || c == '$')
167 sb.setCharAt(i, '.');
168 }
169 return sb;
170 }
171
172 private InternalNameUtils()
173 {}
174
175 public static void main(String [] argv)
176 {
177 try
178 {
179 System.out.println(decodeTypeList(argv[0]));
181 }
182 catch (Exception e)
183 { e.printStackTrace(); }
184 }
185
186
190
199 }
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