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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 some keep rules only keep library classes, no
* program classes. That is strange, because library classes never need to
* be kept explicitly.
*
* @author Eric Lafortune
*/
public class LibraryKeepChecker
implements ClassVisitor
{
private final ClassPool programClassPool;
private final ClassPool libraryClassPool;
private final WarningPrinter notePrinter;
// Some fields acting as parameters for the class visitor.
private String keepName;
/**
* Creates a new DescriptorKeepChecker.
*/
public LibraryKeepChecker(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)
{
if (keepSpecifications != null)
{
// Go over all individual keep specifications.
for (int index = 0; index < keepSpecifications.size(); index++)
{
KeepClassSpecification keepClassSpecification =
(KeepClassSpecification)keepSpecifications.get(index);
// Is the keep specification more specific than a general
// wildcard?
keepName = keepClassSpecification.className;
if (keepName != null)
{
// Doesn't the specification match any program classes?
ClassCounter programClassCounter = new ClassCounter();
programClassPool.accept(
ClassSpecificationVisitorFactory.createClassPoolVisitor(keepClassSpecification,
programClassCounter,
null));
if (programClassCounter.getCount() == 0)
{
// Print out notes about any matched library classes.
libraryClassPool.accept(
ClassSpecificationVisitorFactory.createClassPoolVisitor(keepClassSpecification,
this,
null));
}
}
}
}
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass) {}
public void visitLibraryClass(LibraryClass libraryClass)
{
String className = libraryClass.getName();
notePrinter.print(className,
"Note: the configuration explicitly specifies '" +
ClassUtil.externalClassName(keepName) +
"' to keep library class '" +
ClassUtil.externalClassName(className) +
"'");
}
}
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