/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2006-2007 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.asm;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.tree.ClassNode;
import edu.umd.cs.findbugs.classfile.CheckedAnalysisException;
import edu.umd.cs.findbugs.classfile.ClassDescriptor;
import edu.umd.cs.findbugs.classfile.IAnalysisCache;
import edu.umd.cs.findbugs.classfile.ICodeBaseEntry;
import edu.umd.cs.findbugs.classfile.InvalidClassFileFormatException;
import edu.umd.cs.findbugs.classfile.RecomputableClassAnalysisEngine;
/**
* Analysis engine to produce the ClassNode (ASM tree format) for a class.
*
* @author David Hovemeyer
*/
public class ClassNodeAnalysisEngine extends RecomputableClassAnalysisEngine<ClassNode> {
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.IAnalysisEngine#analyze(edu.umd.cs.findbugs
* .classfile.IAnalysisCache, java.lang.Object)
*/
@Override
public ClassNode analyze(IAnalysisCache analysisCache, ClassDescriptor descriptor) throws CheckedAnalysisException {
ClassReader classReader = analysisCache.getClassAnalysis(ClassReader.class, descriptor);
ICodeBaseEntry entry = analysisCache.getClassPath().lookupResource(descriptor.toResourceName());
// One of the less-than-ideal features of ASM is that
// invalid classfile format is indicated by a
// random runtime exception rather than something
// indicative of the real problem.
try {
ClassNode cn = new ClassNode();
classReader.accept(cn, 0);
return cn;
} catch (RuntimeException e) {
throw new InvalidClassFileFormatException(descriptor, entry, e);
}
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.IAnalysisEngine#registerWith(edu.umd.cs
* .findbugs.classfile.IAnalysisCache)
*/
@Override
public void registerWith(IAnalysisCache analysisCache) {
analysisCache.registerClassAnalysisEngine(ClassNode.class, this);
}
}