| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare |
| * |
| * 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) + |
| "'"); |
| } |
| } |