1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.util;
import proguard.classfile.ClassConstants;
/**
* An <code>ExternalTypeEnumeration</code> provides an enumeration of all
* types listed in a given external descriptor string. The method name can
* be retrieved separately.
* <p>
* A <code>ExternalTypeEnumeration</code> object can be reused for processing
* different subsequent descriptors, by means of the <code>setDescriptor</code>
* method.
*
* @author Eric Lafortune
*/
public class ExternalTypeEnumeration
{
private String descriptor;
private int index;
public ExternalTypeEnumeration(String descriptor)
{
setDescriptor(descriptor);
}
ExternalTypeEnumeration()
{
}
void setDescriptor(String descriptor)
{
this.descriptor = descriptor;
reset();
}
public void reset()
{
index = descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_OPEN) + 1;
if (index < 1)
{
throw new IllegalArgumentException("Missing opening parenthesis in descriptor ["+descriptor+"]");
}
}
public boolean hasMoreTypes()
{
return index < descriptor.length() - 1;
}
public String nextType()
{
int startIndex = index;
// Find the next separating comma.
index = descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_SEPARATOR,
startIndex);
// Otherwise find the closing parenthesis.
if (index < 0)
{
index = descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_CLOSE,
startIndex);
if (index < 0)
{
throw new IllegalArgumentException("Missing closing parenthesis in descriptor ["+descriptor+"]");
}
}
return descriptor.substring(startIndex, index++).trim();
}
public String methodName()
{
return descriptor.substring(0, descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_OPEN)).trim();
}
}
|