/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.io;
import proguard.classfile.*;
import proguard.classfile.io.ProgramClassWriter;
import java.io.*;
/**
* This DataEntryReader reads class entries and writes their corresponding
* versions from the ClassPool to a given DataEntryWriter.
*
* @author Eric Lafortune
*/
public class ClassRewriter implements DataEntryReader
{
private final ClassPool classPool;
private final DataEntryWriter dataEntryWriter;
public ClassRewriter(ClassPool classPool,
DataEntryWriter dataEntryWriter)
{
this.classPool = classPool;
this.dataEntryWriter = dataEntryWriter;
}
// Implementations for DataEntryReader.
public void read(DataEntry dataEntry) throws IOException
{
String inputName = dataEntry.getName();
String className = inputName.substring(0, inputName.length() - ClassConstants.CLASS_FILE_EXTENSION.length());
// Find the modified class corrsponding to the input entry.
ProgramClass programClass = (ProgramClass)classPool.getClass(className);
if (programClass != null)
{
// Rename the data entry if necessary.
String newClassName = programClass.getName();
if (!className.equals(newClassName))
{
dataEntry = new RenamedDataEntry(dataEntry, newClassName + ClassConstants.CLASS_FILE_EXTENSION);
}
// Get the output entry corresponding to this input entry.
OutputStream outputStream = dataEntryWriter.getOutputStream(dataEntry);
if (outputStream != null)
{
// Write the class to the output entry.
DataOutputStream classOutputStream = new DataOutputStream(outputStream);
new ProgramClassWriter(classOutputStream).visitProgramClass(programClass);
classOutputStream.flush();
}
}
}
}