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
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Contributor(s): Thomas Ball
*/
import org.netbeans.modules.classfile.*;
import java.io.*;
import java.util.*;
/**
* PrintClass: write a class as a println statement.
*
* @author Thomas Ball
*/
public class PrintClass {
String thisClass;
PrintClass(String spec) {
thisClass = spec;
}
void print(PrintStream out) throws IOException {
ClassName cn = ClassName.getClassName(thisClass.replace('.', '/'));
InputStream is = findClassStream(cn.getType());
if (is == null) {
System.err.println("couldn't find class: " +
cn.getExternalName());
return;
}
ClassFile cfile = new ClassFile(is);
out.println(cfile);
}
private InputStream findClassStream(String className) {
InputStream is =
ClassLoader.getSystemClassLoader().getResourceAsStream(className + ".class");
return is;
}
/**
* An error routine which displays the command line usage
* before exiting.
*/
public static void usage() {
System.err.println(
"usage: java PrintClass <class> [ <class> ...]");
System.exit(1);
}
public static void main(String[] args) {
if (args.length == 0)
usage();
for (int i = 0; i < args.length; i++) {
if (args[i].charAt(0) == '-')
usage();
else {
try {
PrintClass pc = new PrintClass(args[i]);
pc.print(System.out);
} catch (IOException e) {
System.err.println("error accessing \"" + args[i] +
"\": " + e.toString());
}
}
}
}
}
|
