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Java > Open Source Codes > edu > umd > cs > findbugs > classfile > engine > asm > ClassReaderAnalysisEngine


1 /*
2  * FindBugs - Find Bugs in Java programs
3  * Copyright (C) 2006, University of Maryland
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18  */
19
20 package edu.umd.cs.findbugs.classfile.engine.asm;
21
22 import org.objectweb.asm.ClassReader;
23
24 import edu.umd.cs.findbugs.classfile.CheckedAnalysisException;
25 import edu.umd.cs.findbugs.classfile.ClassDescriptor;
26 import edu.umd.cs.findbugs.classfile.IAnalysisCache;
27 import edu.umd.cs.findbugs.classfile.IClassAnalysisEngine;
28 import edu.umd.cs.findbugs.classfile.analysis.ClassData;
29
30 /**
31  * Analysis engine to produce an ASM ClassReader for a class.
32  *
33  * @author David Hovemeyer
34  */
35 public class ClassReaderAnalysisEngine implements IClassAnalysisEngine {
36
37     /* (non-Javadoc)
38      * @see edu.umd.cs.findbugs.classfile.IAnalysisEngine#analyze(edu.umd.cs.findbugs.classfile.IAnalysisCache, java.lang.Object)
39      */
40     public Object JavaDoc analyze(IAnalysisCache analysisCache,
41             ClassDescriptor descriptor) throws CheckedAnalysisException {
42
43         ClassData classData = analysisCache.getClassAnalysis(ClassData.class, descriptor);
44         
45         ClassReader classReader = new ClassReader(classData.getData());
46         
47         return classReader;
48     }
49
50     /* (non-Javadoc)
51      * @see edu.umd.cs.findbugs.classfile.IAnalysisEngine#registerWith(edu.umd.cs.findbugs.classfile.IAnalysisCache)
52      */
53     public void registerWith(IAnalysisCache analysisCache) {
54         analysisCache.registerClassAnalysisEngine(ClassReader.class, this);
55     }
56
57     /* (non-Javadoc)
58      * @see edu.umd.cs.findbugs.classfile.IAnalysisEngine#retainAnalysisResults()
59      */
60     public boolean retainAnalysisResults() {
61         // Can be recomputed easily
62 return false;
63     }
64 }
65
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