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Java > Open Source Codes > com > sun > org > apache > bcel > internal > verifier > TransitiveHull


1 package com.sun.org.apache.bcel.internal.verifier;
2
3 /* ====================================================================
4  * The Apache Software License, Version 1.1
5  *
6  * Copyright (c) 2001 The Apache Software Foundation. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
27  *
28  * 4. The names "Apache" and "Apache Software Foundation" and
29  * "Apache BCEL" must not be used to endorse or promote products
30  * derived from this software without prior written permission. For
31  * written permission, please contact apache@apache.org.
32  *
33  * 5. Products derived from this software may not be called "Apache",
34  * "Apache BCEL", nor may "Apache" appear in their name, without
35  * prior written permission of the Apache Software Foundation.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
49  * ====================================================================
50  *
51  * This software consists of voluntary contributions made by many
52  * individuals on behalf of the Apache Software Foundation. For more
53  * information on the Apache Software Foundation, please see
54  * <http://www.apache.org/>.
55  */
56
57 import com.sun.org.apache.bcel.internal.verifier.*;
58 import com.sun.org.apache.bcel.internal.classfile.*;
59 import com.sun.org.apache.bcel.internal.*;
60
61 /**
62  * This class has a _main method implementing a demonstration program
63  * of how to use the VerifierFactoryObserver. It transitively verifies
64  * all class files encountered; this may take up a lot of time and,
65  * more notably, memory.
66  *
67  * @version $Id: TransitiveHull.java,v 1.1.1.1 2001/10/29 20:00:31 jvanzyl Exp $
68  * @author <A HREF="http://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
69  */
70 public class TransitiveHull implements VerifierFactoryObserver{
71
72     /** Used for indentation. */
73     private int indent = 0;
74
75     /** Not publicly instantiable. */
76     private TransitiveHull(){
77     }
78     
79     /* Implementing VerifierFactoryObserver. */
80     public void update(String JavaDoc classname){
81
82         System.gc(); // avoid swapping if possible.
83
84         for (int i=0; i<indent; i++){
85             System.out.print(" ");
86         }
87         System.out.println(classname);
88         indent += 1;
89
90         Verifier v = VerifierFactory.getVerifier(classname);
91     
92         VerificationResult vr;
93         vr = v.doPass1();
94         if (vr != VerificationResult.VR_OK) //System.exit(1);
95 System.out.println("Pass 1:\n"+vr);
96
97         vr = v.doPass2();
98       if (vr != VerificationResult.VR_OK) //System.exit(1);
99 System.out.println("Pass 2:\n"+vr);
100
101         if (vr == VerificationResult.VR_OK){
102             JavaClass jc = Repository.lookupClass(v.getClassName());
103             for (int i=0; i<jc.getMethods().length; i++){
104                 vr = v.doPass3a(i);
105                 if (vr != VerificationResult.VR_OK) //System.exit(1);
106 System.out.println(v.getClassName()+", Pass 3a, method "+i+" ['"+jc.getMethods()[i]+"']:\n"+vr);
107
108                 vr = v.doPass3b(i);
109                 if (vr != VerificationResult.VR_OK) //System.exit(1);
110 System.out.println(v.getClassName()+", Pass 3b, method "+i+" ['"+jc.getMethods()[i]+"']:\n"+vr);
111             }
112         }
113
114         indent -= 1;
115     }
116
117     /**
118      * This method implements a demonstration program
119      * of how to use the VerifierFactoryObserver. It transitively verifies
120      * all class files encountered; this may take up a lot of time and,
121      * more notably, memory.
122      */
123     public static void _main(String JavaDoc[] args){
124         if (args.length != 1){
125             System.out.println("Need exactly one argument: The root class to verify.");
126             System.exit(1);
127         }
128
129         int dotclasspos = args[0].lastIndexOf(".class");
130         if (dotclasspos != -1) args[0] = args[0].substring(0,dotclasspos);
131         args[0] = args[0].replace('/', '.');
132     
133         TransitiveHull th = new TransitiveHull();
134         VerifierFactory.attach(th);
135         VerifierFactory.getVerifier(args[0]); // the observer is called back and does the actual trick.
136 VerifierFactory.detach(th);
137     }
138 }
139
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