/*
* 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;
import edu.umd.cs.findbugs.asm.FBClassReader;
import edu.umd.cs.findbugs.ba.XClass;
import edu.umd.cs.findbugs.classfile.CheckedAnalysisException;
import edu.umd.cs.findbugs.classfile.ClassDescriptor;
import edu.umd.cs.findbugs.classfile.ClassNameMismatchException;
import edu.umd.cs.findbugs.classfile.IAnalysisCache;
import edu.umd.cs.findbugs.classfile.IClassAnalysisEngine;
import edu.umd.cs.findbugs.classfile.analysis.ClassData;
import edu.umd.cs.findbugs.classfile.analysis.ClassInfo;
/**
* Analysis engine to produce the ClassInfo for a loaded class. We parse just
* enough information from the classfile to get the needed information.
*
* @author David Hovemeyer
*/
public class ClassInfoAnalysisEngine implements IClassAnalysisEngine<XClass> {
/*
* private static final boolean USE_ASM_CLASS_PARSER =
* SystemProperties.getBoolean("findbugs.classparser.asm"); static { if
* (USE_ASM_CLASS_PARSER) { System.out.println("Using ClassParserUsingASM");
* } }
*/
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.IAnalysisEngine#analyze(edu.umd.cs.findbugs
* .classfile.IAnalysisCache, java.lang.Object)
*/
@Override
public ClassInfo analyze(IAnalysisCache analysisCache, ClassDescriptor descriptor) throws CheckedAnalysisException {
if (descriptor instanceof ClassInfo) {
return (ClassInfo) descriptor;
}
ClassData classData;
try {
classData = analysisCache.getClassAnalysis(ClassData.class, descriptor);
} catch (edu.umd.cs.findbugs.classfile.MissingClassException e) {
if (!descriptor.getSimpleName().equals("package-info")) {
throw e;
}
ClassInfo.Builder builder = new ClassInfo.Builder();
builder.setClassDescriptor(descriptor);
builder.setAccessFlags(1536);
return builder.build();
}
// Read the class info
FBClassReader reader = analysisCache.getClassAnalysis(FBClassReader.class, descriptor);
ClassParserInterface parser = new ClassParserUsingASM(reader, descriptor, classData.getCodeBaseEntry());
ClassInfo.Builder classInfoBuilder = new ClassInfo.Builder();
parser.parse(classInfoBuilder);
ClassInfo classInfo = classInfoBuilder.build();
if (!classInfo.getClassDescriptor().equals(descriptor)) {
throw new ClassNameMismatchException(descriptor, classInfo.getClassDescriptor(), classData.getCodeBaseEntry());
}
return classInfo;
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.IAnalysisEngine#registerWith(edu.umd.cs
* .findbugs.classfile.IAnalysisCache)
*/
@Override
public void registerWith(IAnalysisCache analysisCache) {
analysisCache.registerClassAnalysisEngine(XClass.class, this);
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.classfile.IAnalysisEngine#canRecompute()
*/
@Override
public boolean canRecompute() {
// ClassInfo objects serve as XClass objects,
// which we want interned. So, they are never purged from the cache.
return false;
}
}