/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2003-2007 University of Maryland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.classfile.engine.bcel;
import org.apache.bcel.classfile.Code;
import org.apache.bcel.classfile.Method;
import edu.umd.cs.findbugs.ba.BytecodeScanner;
import edu.umd.cs.findbugs.ba.MethodBytecodeSet;
import edu.umd.cs.findbugs.classfile.CheckedAnalysisException;
import edu.umd.cs.findbugs.classfile.IAnalysisCache;
import edu.umd.cs.findbugs.classfile.MethodDescriptor;
/**
* @author David Hovemeyer
*/
public class MethodBytecodeSetFactory extends AnalysisFactory<MethodBytecodeSet> {
/**
* @param analysisName
* @param analysisClass
*/
public MethodBytecodeSetFactory(String analysisName, Class<MethodBytecodeSet> analysisClass) {
super(analysisName, analysisClass);
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.IAnalysisEngine#analyze(edu.umd.cs.findbugs
* .classfile.IAnalysisCache, java.lang.Object)
*/
@Override
public MethodBytecodeSet analyze(IAnalysisCache analysisCache, MethodDescriptor descriptor) throws CheckedAnalysisException {
Method method = analysisCache.getMethodAnalysis(Method.class, descriptor);
Code code = method.getCode();
if (code == null) {
return null;
}
byte[] instructionList = code.getCode();
// Create callback
UnpackedBytecodeCallback callback = new UnpackedBytecodeCallback(instructionList.length);
// Scan the method.
BytecodeScanner scanner = new BytecodeScanner();
scanner.scan(instructionList, callback);
UnpackedCode unpackedCode = callback.getUnpackedCode();
MethodBytecodeSet result = null;
if (unpackedCode != null) {
result = unpackedCode.getBytecodeSet();
}
return result;
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.IAnalysisEngine#registerWith(edu.umd.cs
* .findbugs.classfile.IAnalysisCache)
*/
@Override
public void registerWith(IAnalysisCache analysisCache) {
analysisCache.registerMethodAnalysisEngine(MethodBytecodeSet.class, this);
}
}