/*
* 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.Method;
import org.apache.bcel.generic.MethodGen;
import edu.umd.cs.findbugs.ba.AnalysisContext;
import edu.umd.cs.findbugs.ba.AnalysisFeatures;
import edu.umd.cs.findbugs.ba.CFG;
import edu.umd.cs.findbugs.ba.ClassContext;
import edu.umd.cs.findbugs.ba.DepthFirstSearch;
import edu.umd.cs.findbugs.ba.MethodUnprofitableException;
import edu.umd.cs.findbugs.ba.type.ExceptionSetFactory;
import edu.umd.cs.findbugs.ba.type.TypeAnalysis;
import edu.umd.cs.findbugs.ba.type.TypeDataflow;
import edu.umd.cs.findbugs.classfile.CheckedAnalysisException;
import edu.umd.cs.findbugs.classfile.IAnalysisCache;
import edu.umd.cs.findbugs.classfile.MethodDescriptor;
/**
* Analysis engine to produce TypeDataflow objects for analyzed methods.
*
* @author David Hovemeyer
*/
public class TypeDataflowFactory extends AnalysisFactory<TypeDataflow> {
/**
* Constructor.
*/
public TypeDataflowFactory() {
super("type analysis", TypeDataflow.class);
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.IAnalysisEngine#analyze(edu.umd.cs.findbugs
* .classfile.IAnalysisCache, java.lang.Object)
*/
@Override
public TypeDataflow analyze(IAnalysisCache analysisCache, MethodDescriptor descriptor) throws CheckedAnalysisException {
MethodGen methodGen = getMethodGen(analysisCache, descriptor);
if (methodGen == null) {
throw new MethodUnprofitableException(descriptor);
}
CFG cfg = getCFG(analysisCache, descriptor);
DepthFirstSearch dfs = getDepthFirstSearch(analysisCache, descriptor);
ExceptionSetFactory exceptionSetFactory = getExceptionSetFactory(analysisCache, descriptor);
Method method = getMethod(analysisCache, descriptor);
TypeAnalysis typeAnalysis = new TypeAnalysis(method, methodGen, cfg, dfs, AnalysisContext.currentAnalysisContext()
.getLookupFailureCallback(), exceptionSetFactory);
if (AnalysisContext.currentAnalysisContext().getBoolProperty(AnalysisFeatures.MODEL_INSTANCEOF)) {
typeAnalysis.setValueNumberDataflow(getValueNumberDataflow(analysisCache, descriptor));
}
// Field store type database.
// If present, this can give us more accurate type information
// for values loaded from fields.
typeAnalysis.setFieldStoreTypeDatabase(AnalysisContext.currentAnalysisContext().getFieldStoreTypeDatabase());
TypeDataflow typeDataflow = new TypeDataflow(cfg, typeAnalysis);
try {
typeDataflow.execute();
} catch (CheckedAnalysisException e) {
AnalysisContext.logError("Error performing type dataflow analysis of " + descriptor, e);
throw e;
}
if (TypeAnalysis.DEBUG || ClassContext.DUMP_DATAFLOW_ANALYSIS) {
ClassContext.dumpTypeDataflow(method, cfg, typeDataflow);
}
return typeDataflow;
}
}