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Java > Open Source Codes > org > apache > bcel > verifier > NativeVerifier


1 /*
2  * Copyright 2000-2004 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 package org.apache.bcel.verifier;
18
19 /**
20  * The NativeVerifier class implements a main(String[] args) method that's
21  * roughly compatible to the one in the Verifier class, but that uses the
22  * JVM's internal verifier for its class file verification.
23  * This can be used for comparison runs between the JVM-internal verifier
24  * and JustIce.
25  *
26  * @version $Id: NativeVerifier.java 386056 2006-03-15 11:31:56Z tcurdt $
27  * @author Enver Haase
28  */
29 public abstract class NativeVerifier {
30
31     /**
32      * This class must not be instantiated.
33      */
34     private NativeVerifier() {
35     }
36
37
38     /**
39      * Works only on the first argument.
40      */
41     public static void main( String JavaDoc[] args ) {
42         if (args.length != 1) {
43             System.out.println("Verifier front-end: need exactly one argument.");
44             System.exit(1);
45         }
46         int dotclasspos = args[0].lastIndexOf(".class");
47         if (dotclasspos != -1) {
48             args[0] = args[0].substring(0, dotclasspos);
49         }
50         args[0] = args[0].replace('/', '.');
51         //System.out.println(args[0]);
52 try {
53             Class.forName(args[0]);
54         } catch (ExceptionInInitializerError JavaDoc eiie) { //subclass of LinkageError!
55 System.out.println("NativeVerifier: ExceptionInInitializerError encountered on '"
56                     + args[0] + "'.");
57             System.out.println(eiie);
58             System.exit(1);
59         } catch (LinkageError JavaDoc le) {
60             System.out.println("NativeVerifier: LinkageError encountered on '" + args[0] + "'.");
61             System.out.println(le);
62             System.exit(1);
63         } catch (ClassNotFoundException JavaDoc cnfe) {
64             System.out.println("NativeVerifier: FILE NOT FOUND: '" + args[0] + "'.");
65             System.exit(1);
66         } catch (Throwable JavaDoc t) {
67             System.out.println("NativeVerifier: Unspecified verification error on'" + args[0]
68                     + "'.");
69             System.exit(1);
70         }
71         System.out.println("NativeVerifier: Class file '" + args[0] + "' seems to be okay.");
72         System.exit(0);
73     }
74 }
75
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