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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Closure.java
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common
* Development and Distribution License("CDDL") (collectively, the
* "License"). You may not use this file except in compliance with the
* License. You can obtain a copy of the License at
* http://www.netbeans.org/cddl-gplv2.html
* or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
* specific language governing permissions and limitations under the
* License. When distributing the software, include this License Header
* Notice in each file and include the License file at
* nbbuild/licenses/CDDL-GPL-2-CP. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the
* License Header, with the fields enclosed by brackets [] replaced by
* your own identifying information:
* "Portions Copyrighted [year] [name of copyright owner]"
*
* Contributor(s):
*
* The Original Software is NetBeans. The Initial Developer of the Original
* Software is Sun Microsystems, Inc. Portions Copyright 2000-2001 Sun
* Microsystems, Inc. All Rights Reserved.
*
* If you wish your version of this file to be governed by only the CDDL
* or only the GPL Version 2, indicate your decision by adding
* "[Contributor] elects to include this software in this distribution
* under the [CDDL or GPL Version 2] license." If you do not indicate a
* single choice of license, a recipient has the option to distribute
* your version of this file under either the CDDL, the GPL Version 2 or
* to extend the choice of license to its licensees as provided above.
* However, if you add GPL Version 2 code and therefore, elected the GPL
* Version 2 license, then the option applies only if the new code is
* made subject to such option by the copyright holder.
*
* Contributor(s): Thomas Ball
*
* Version: $Revision$
*/
import org.netbeans.modules.classfile.*;
import java.io.*;
import java.util.*;
/**
* Closure: report all classes which this file references in one
* way or another. Note: this utility won't find classes which are
* dynamically loaded.
*
* @author Thomas Ball
*/
public class Closure {
String thisClass;
Set<String> closure;
Closure(String spec) {
thisClass = spec;
}
void buildClosure(boolean includeJDK)
throws IOException {
if (closure != null)
return;
closure = new HashSet<String>();
Set<String> visited = new HashSet<String>();
Stack<ClassName> stk = new Stack<ClassName>();
ClassName thisCN = ClassName.getClassName(thisClass.replace('.', '/'));
stk.push(thisCN);
visited.add(thisCN.getExternalName());
while (!stk.empty()) {
// Add class to closure.
ClassName cn = (ClassName)stk.pop();
InputStream is = findClassStream(cn.getType());
if (is == null) {
System.err.println("couldn't find class: " +
cn.getExternalName());
continue;
}
ClassFile cfile = new ClassFile(is);
closure.add(cfile.getName().getExternalName());
ConstantPool pool = cfile.getConstantPool();
Iterator refs = pool.getAllClassNames().iterator();
while (refs.hasNext()) {
ClassName cnRef = (ClassName)refs.next();
String cname = cnRef.getExternalName();
if (cname.indexOf('[') != -1) {
// skip arrays
} else if (!includeJDK &&
(cname.startsWith("java.") ||
cname.startsWith("javax.") ||
cname.startsWith("sun.") ||
cname.startsWith("com.sun.corba") ||
cname.startsWith("com.sun.image") ||
cname.startsWith("com.sun.java.swing") ||
cname.startsWith("com.sun.naming") ||
cname.startsWith("com.sun.security"))) {
// if directed, skip JDK references
} else {
boolean isNew = visited.add(cname);
if (isNew)
stk.push(cnRef);
}
}
}
}
void dumpClosure(PrintStream out) {
Iterator iter = new TreeSet(closure).iterator();
while (iter.hasNext())
out.println((String)iter.next());
}
Iterator dependencies() {
return closure.iterator();
}
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 Closure [-includejdk] <class> [ <class> ...]");
System.exit(1);
}
public static void main(String[] args) {
if (args.length == 0)
usage();
boolean includeJDK = false;
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-includejdk"))
includeJDK = true;
else if (args[i].charAt(0) == '-')
usage();
else {
try {
Closure c = new Closure(args[i]);
c.buildClosure(includeJDK);
c.dumpClosure(System.out);
} catch (IOException e) {
System.err.println("error accessing \"" + args[i] +
"\": " + e.toString());
}
}
}
}
}
|
