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/*
* 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.*;
import proguard.classfile.util.*;
import proguard.classfile.visitor.ClassVisitor;
import java.io.*;
/**
* This DataEntryReader applies a given ClassVisitor to the class
* definitions that it reads.
* <p>
* Class files are read as ProgramClass objects or LibraryClass objects,
* depending on the <code>isLibrary</code> flag.
* <p>
* In case of libraries, only public classes are considered, if the
* <code>skipNonPublicLibraryClasses</code> flag is set.
*
* @author Eric Lafortune
*/
public class ClassReader implements DataEntryReader
{
private final boolean isLibrary;
private final boolean skipNonPublicLibraryClasses;
private final boolean skipNonPublicLibraryClassMembers;
private final WarningPrinter warningPrinter;
private final ClassVisitor classVisitor;
/**
* Creates a new DataEntryClassFilter for reading the specified
* Clazz objects.
*/
public ClassReader(boolean isLibrary,
boolean skipNonPublicLibraryClasses,
boolean skipNonPublicLibraryClassMembers,
WarningPrinter warningPrinter,
ClassVisitor classVisitor)
{
this.isLibrary = isLibrary;
this.skipNonPublicLibraryClasses = skipNonPublicLibraryClasses;
this.skipNonPublicLibraryClassMembers = skipNonPublicLibraryClassMembers;
this.warningPrinter = warningPrinter;
this.classVisitor = classVisitor;
}
// Implementations for DataEntryReader.
public void read(DataEntry dataEntry) throws IOException
{
try
{
// Get the input stream.
InputStream inputStream = dataEntry.getInputStream();
// Wrap it into a data input stream.
DataInputStream dataInputStream = new DataInputStream(inputStream);
// Create a Clazz representation.
Clazz clazz;
if (isLibrary)
{
clazz = new LibraryClass();
clazz.accept(new LibraryClassReader(dataInputStream, skipNonPublicLibraryClasses, skipNonPublicLibraryClassMembers));
}
else
{
clazz = new ProgramClass();
clazz.accept(new ProgramClassReader(dataInputStream));
}
// Apply the visitor, if we have a real class.
String className = clazz.getName();
if (className != null)
{
if (!dataEntry.getName().replace(File.pathSeparatorChar, ClassConstants.INTERNAL_PACKAGE_SEPARATOR).equals(className+ClassConstants.CLASS_FILE_EXTENSION) &&
warningPrinter != null)
{
warningPrinter.print(className,
"Warning: class [" + dataEntry.getName() + "] unexpectedly contains class [" + ClassUtil.externalClassName(className) + "]");
}
clazz.accept(classVisitor);
}
dataEntry.closeInputStream();
}
catch (Exception ex)
{
throw (IOException)new IOException("Can't process class ["+dataEntry.getName()+"] ("+ex.getMessage()+")").initCause(ex);
}
}
}
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