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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2014 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;
import proguard.classfile.*;
import proguard.classfile.util.*;
import proguard.classfile.visitor.*;
import proguard.optimize.*;
import java.util.List;
/**
* This class checks whether classes referenced by class members that are
* marked to be kept are marked to be kept too.
*
* @author Eric Lafortune
*/
public class DescriptorKeepChecker
extends SimplifiedVisitor
implements MemberVisitor,
ClassVisitor
{
private final ClassPool programClassPool;
private final ClassPool libraryClassPool;
private final WarningPrinter notePrinter;
// Some fields acting as parameters for the class visitor.
private Clazz referencingClass;
private Member referencingMember;
private boolean isField;
/**
* Creates a new DescriptorKeepChecker.
*/
public DescriptorKeepChecker(ClassPool programClassPool,
ClassPool libraryClassPool,
WarningPrinter notePrinter)
{
this.programClassPool = programClassPool;
this.libraryClassPool = libraryClassPool;
this.notePrinter = notePrinter;
}
/**
* Checks the classes mentioned in the given keep specifications, printing
* notes if necessary.
*/
public void checkClassSpecifications(List keepSpecifications)
{
// Clean up any old visitor info.
programClassPool.classesAccept(new ClassCleaner());
libraryClassPool.classesAccept(new ClassCleaner());
// Create a visitor for marking the seeds.
KeepMarker keepMarker = new KeepMarker();
ClassPoolVisitor classPoolvisitor =
ClassSpecificationVisitorFactory.createClassPoolVisitor(keepSpecifications,
keepMarker,
keepMarker,
false,
true,
true);
// Mark the seeds.
programClassPool.accept(classPoolvisitor);
libraryClassPool.accept(classPoolvisitor);
// Print out notes about argument types that are not being kept in
// class members that are being kept.
programClassPool.classesAccept(
new AllMemberVisitor(
new KeptMemberFilter(this)));
}
// Implementations for MemberVisitor.
public void visitProgramField(ProgramClass programClass, ProgramField programField)
{
//referencingClass = programClass;
//referencingMember = programField;
//isField = true;
//
// Don't check the type, because it is not required for introspection.
//programField.referencedClassesAccept(this);
}
public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
{
referencingClass = programClass;
referencingMember = programMethod;
isField = false;
// Don't check the return type, because it is not required for
// introspection (e.g. the return type of the special Enum methods).
//programMethod.referencedClassesAccept(this);
Clazz[] referencedClasses = programMethod.referencedClasses;
if (referencedClasses != null)
{
int count = referencedClasses.length;
// Adapt the count if the return type is a class type (not so
// pretty; assuming test just checks for final ';').
if (ClassUtil.isInternalClassType(programMethod.getDescriptor(programClass)))
{
count--;
}
for (int index = 0; index < count; index++)
{
if (referencedClasses[index] != null)
{
referencedClasses[index].accept(this);
}
}
}
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
if (!KeepMarker.isKept(programClass))
{
notePrinter.print(referencingClass.getName(),
programClass.getName(),
"Note: the configuration keeps the entry point '" +
ClassUtil.externalClassName(referencingClass.getName()) +
" { " +
(isField ?
ClassUtil.externalFullFieldDescription(0,
referencingMember.getName(referencingClass),
referencingMember.getDescriptor(referencingClass)) :
ClassUtil.externalFullMethodDescription(referencingClass.getName(),
0,
referencingMember.getName(referencingClass),
referencingMember.getDescriptor(referencingClass))) +
"; }', but not the descriptor class '" +
ClassUtil.externalClassName(programClass.getName()) +
"'");
}
}
public void visitLibraryClass(LibraryClass libraryClass) {}
}
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