/* Copyright (c) 2002-2011 by XMLVM.org
*
* Project Info: http://www.xmlvm.org
*
* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package org.xmlvm.util.analytics;
import org.xmlvm.util.analytics.data.TypeHierarchy;
import org.xmlvm.util.analytics.data.Util;
import org.xmlvm.util.universalfile.UniversalFile;
import org.xmlvm.util.universalfile.UniversalFileCreator;
import org.xmlvm.util.universalfile.UniversalFileFilter;
import com.android.dx.cf.direct.DirectClassFile;
import com.android.dx.cf.direct.StdAttributeFactory;
import com.android.dx.cf.iface.ParseException;
import com.android.dx.rop.type.TypeList;
/**
* The HierarchyAnalyzer takes a set of classes and analyzes their hierarchy. It
* creates a {@link TypeHierarchy} object which allows for a comprehensive
* analysis of type hierarchies in a library.
*/
public class HierarchyAnalyzer
{
private final String libraryPath;
public static void main(String[] args)
{
// The library JAR or root directory should be given
if (args.length != 1)
{
System.err.println("Invalid usage.\nExpected: HierarchyAnalyer <filename.jar|directory>");
System.exit(-1);
}
HierarchyAnalyzer analyzer= new HierarchyAnalyzer(args[0]);
TypeHierarchy hierarchy= analyzer.analyze();
System.out.println("Type hierarchy:");
System.out.println(hierarchy.toString());
}
/**
* Initialized the {@link HierarchyAnalyzer} with the given JAR file.
*
* @param libraryPath
* The JAR file or root directory of the library to analyze.
*/
public HierarchyAnalyzer(String libraryPath)
{
this.libraryPath= libraryPath;
}
/**
* Performs the hierarchy analysis and returns the result.
*/
public TypeHierarchy analyze()
{
// Extract all class files.
UniversalFile library= UniversalFileCreator.createDirectory(null, libraryPath);
UniversalFile[] classes= library.listFilesRecursively(new UniversalFileFilter()
{
public boolean accept(UniversalFile file)
{
return file.getName().toLowerCase().endsWith(".class");
}
});
System.out.println("Getting type hierarchy for " + classes.length + " classes.");
TypeHierarchy result= new TypeHierarchy();
final String basePath= library.getAbsolutePath();
for (UniversalFile clazz : classes)
{
String fileName= clazz.getRelativePath(basePath).replace('\\', '.');
DirectClassFile classFile= new DirectClassFile(clazz.getFileAsBytes(), fileName, false);
classFile.setAttributeFactory(StdAttributeFactory.THE_ONE);
try
{
classFile.getMagic();
}
catch (ParseException ex)
{
continue;
}
final int DOT_CLASS_LENGTH= ".class".length();
String className= fileName.substring(0, fileName.length() - DOT_CLASS_LENGTH).replace('/', '.');
// Super-class.
if (classFile.getSuperclass() != null)
{
String superClassName= Util.parseClassName(classFile.getSuperclass().getClassType().getClassName()).toString();
result.addDirectSubType(className, superClassName);
}
// Interfaces
TypeList interfaces= classFile.getInterfaces();
if (interfaces != null)
{
for (int i= 0; i < interfaces.size(); i++)
{
String interfaceName= Util.parseClassName(interfaces.getType(i).getClassName()).toString();
result.addDirectSubType(className, interfaceName);
}
}
}
return result;
}
}