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Diffstat (limited to 'src/proguard/shrink/Shrinker.java')
| -rw-r--r-- | src/proguard/shrink/Shrinker.java | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/src/proguard/shrink/Shrinker.java b/src/proguard/shrink/Shrinker.java deleted file mode 100644 index 72f878b..0000000 --- a/src/proguard/shrink/Shrinker.java +++ /dev/null @@ -1,183 +0,0 @@ -/* - * 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.shrink; - -import proguard.*; -import proguard.classfile.*; -import proguard.classfile.attribute.visitor.*; -import proguard.classfile.visitor.*; - -import java.io.*; - -/** - * This class shrinks class pools according to a given configuration. - * - * @author Eric Lafortune - */ -public class Shrinker -{ - private final Configuration configuration; - - - /** - * Creates a new Shrinker. - */ - public Shrinker(Configuration configuration) - { - this.configuration = configuration; - } - - - /** - * Performs shrinking of the given program class pool. - */ - public ClassPool execute(ClassPool programClassPool, - ClassPool libraryClassPool) throws IOException - { - // Check if we have at least some keep commands. - if (configuration.keep == null) - { - throw new IOException("You have to specify '-keep' options for the shrinking step."); - } - - // Clean up any old visitor info. - programClassPool.classesAccept(new ClassCleaner()); - libraryClassPool.classesAccept(new ClassCleaner()); - - // Create a visitor for marking the seeds. - UsageMarker usageMarker = configuration.whyAreYouKeeping == null ? - new UsageMarker() : - new ShortestUsageMarker(); - - // Automatically mark the parameterless constructors of seed classes, - // mainly for convenience and for backward compatibility. - ClassVisitor classUsageMarker = - new MultiClassVisitor(new ClassVisitor[] - { - usageMarker, - new NamedMethodVisitor(ClassConstants.METHOD_NAME_INIT, - ClassConstants.METHOD_TYPE_INIT, - usageMarker) - }); - - ClassPoolVisitor classPoolvisitor = - ClassSpecificationVisitorFactory.createClassPoolVisitor(configuration.keep, - classUsageMarker, - usageMarker, - true, - false, - false); - // Mark the seeds. - programClassPool.accept(classPoolvisitor); - libraryClassPool.accept(classPoolvisitor); - libraryClassPool.classesAccept(usageMarker); - - // Mark interfaces that have to be kept. - programClassPool.classesAccept(new InterfaceUsageMarker(usageMarker)); - - // Mark the inner class and annotation information that has to be kept. - programClassPool.classesAccept( - new UsedClassFilter(usageMarker, - new AllAttributeVisitor(true, - new MultiAttributeVisitor(new AttributeVisitor[] - { - new InnerUsageMarker(usageMarker), - new AnnotationUsageMarker(usageMarker), - new LocalVariableTypeUsageMarker(usageMarker) - })))); - - // Should we explain ourselves? - if (configuration.whyAreYouKeeping != null) - { - System.out.println(); - - // Create a visitor for explaining classes and class members. - ShortestUsagePrinter shortestUsagePrinter = - new ShortestUsagePrinter((ShortestUsageMarker)usageMarker, - configuration.verbose); - - ClassPoolVisitor whyClassPoolvisitor = - ClassSpecificationVisitorFactory.createClassPoolVisitor(configuration.whyAreYouKeeping, - shortestUsagePrinter, - shortestUsagePrinter); - - // Mark the seeds. - programClassPool.accept(whyClassPoolvisitor); - libraryClassPool.accept(whyClassPoolvisitor); - } - - if (configuration.printUsage != null) - { - PrintStream ps = - configuration.printUsage == Configuration.STD_OUT ? System.out : - new PrintStream( - new BufferedOutputStream( - new FileOutputStream(configuration.printUsage))); - - // Print out items that will be removed. - programClassPool.classesAcceptAlphabetically( - new UsagePrinter(usageMarker, true, ps)); - - if (ps == System.out) - { - ps.flush(); - } - else - { - ps.close(); - } - } - - // Clean up used program classes and discard unused program classes. - int originalProgramClassPoolSize = programClassPool.size(); - - ClassPool newProgramClassPool = new ClassPool(); - programClassPool.classesAccept( - new UsedClassFilter(usageMarker, - new MultiClassVisitor( - new ClassVisitor[] { - new ClassShrinker(usageMarker), - new ClassPoolFiller(newProgramClassPool) - }))); - - programClassPool.clear(); - - // Clean up library classes. - libraryClassPool.classesAccept( - new ClassShrinker(usageMarker)); - - // Check if we have at least some output classes. - int newProgramClassPoolSize = newProgramClassPool.size(); - if (newProgramClassPoolSize == 0) - { - throw new IOException("The output jar is empty. Did you specify the proper '-keep' options?"); - } - - if (configuration.verbose) - { - System.out.println("Removing unused program classes and class elements..."); - System.out.println(" Original number of program classes: " + originalProgramClassPoolSize); - System.out.println(" Final number of program classes: " + newProgramClassPoolSize); - } - - return newProgramClassPool; - } -} |