/*
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* ProGuard -- shrinking, optimization, obfuscation, and preverification
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* of Java bytecode.
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*
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* Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package proguard;
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import proguard.classfile.*;
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import proguard.classfile.util.*;
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import proguard.classfile.visitor.*;
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import proguard.optimize.*;
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import java.util.List;
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/**
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* This class checks whether some keep rules only keep library classes, no
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* program classes. That is strange, because library classes never need to
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* be kept explicitly.
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*
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* @author Eric Lafortune
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*/
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public class LibraryKeepChecker
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implements ClassVisitor
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{
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private final ClassPool programClassPool;
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private final ClassPool libraryClassPool;
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private final WarningPrinter notePrinter;
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// Some fields acting as parameters for the class visitor.
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private String keepName;
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/**
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* Creates a new DescriptorKeepChecker.
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*/
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public LibraryKeepChecker(ClassPool programClassPool,
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ClassPool libraryClassPool,
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WarningPrinter notePrinter)
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{
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this.programClassPool = programClassPool;
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this.libraryClassPool = libraryClassPool;
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this.notePrinter = notePrinter;
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}
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/**
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* Checks the classes mentioned in the given keep specifications, printing
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* notes if necessary.
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*/
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public void checkClassSpecifications(List keepSpecifications)
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{
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if (keepSpecifications != null)
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{
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// Go over all individual keep specifications.
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for (int index = 0; index < keepSpecifications.size(); index++)
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{
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KeepClassSpecification keepClassSpecification =
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(KeepClassSpecification)keepSpecifications.get(index);
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// Is the keep specification more specific than a general
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// wildcard?
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keepName = keepClassSpecification.className;
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if (keepName != null)
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{
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// Doesn't the specification match any program classes?
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ClassCounter programClassCounter = new ClassCounter();
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programClassPool.accept(
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ClassSpecificationVisitorFactory.createClassPoolVisitor(keepClassSpecification,
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programClassCounter,
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null));
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if (programClassCounter.getCount() == 0)
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{
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// Print out notes about any matched library classes.
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libraryClassPool.accept(
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ClassSpecificationVisitorFactory.createClassPoolVisitor(keepClassSpecification,
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this,
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null));
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}
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}
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}
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}
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}
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// Implementations for ClassVisitor.
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public void visitProgramClass(ProgramClass programClass) {}
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public void visitLibraryClass(LibraryClass libraryClass)
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{
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String className = libraryClass.getName();
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notePrinter.print(className,
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"Note: the configuration explicitly specifies '" +
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ClassUtil.externalClassName(keepName) +
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"' to keep library class '" +
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ClassUtil.externalClassName(className) +
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"'");
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}
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}
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