1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 package proguard; 22 23 import proguard.classfile.ClassPool; 24 import proguard.classfile.visitor.*; 25 import proguard.optimize.*; 26 27 import java.io.*; 28 29 /** 30 * This class prints out the seeds specified by keep options. 31 * 32 * @author Eric Lafortune 33 */ 34 public class SeedPrinter 35 { 36 private final PrintStream ps; 37 38 39 /** 40 * Creates a new ConfigurationWriter for the given PrintStream. 41 */ SeedPrinter(PrintStream ps)42 public SeedPrinter(PrintStream ps) throws IOException 43 { 44 this.ps = ps; 45 } 46 47 48 /** 49 * Prints out the seeds for the classes in the given program class pool. 50 * @param configuration the configuration containing the keep options. 51 * @throws IOException if an IO error occurs while writing the configuration. 52 */ write(Configuration configuration, ClassPool programClassPool, ClassPool libraryClassPool)53 public void write(Configuration configuration, 54 ClassPool programClassPool, 55 ClassPool libraryClassPool) throws IOException 56 { 57 // Check if we have at least some keep commands. 58 if (configuration.keep == null) 59 { 60 throw new IOException("You have to specify '-keep' options for the shrinking step."); 61 } 62 63 // Clean up any old visitor info. 64 programClassPool.classesAccept(new ClassCleaner()); 65 libraryClassPool.classesAccept(new ClassCleaner()); 66 67 // Create a visitor for printing out the seeds. We're printing out 68 // the program elements that are preserved against shrinking, 69 // optimization, or obfuscation. 70 KeepMarker keepMarker = new KeepMarker(); 71 ClassPoolVisitor classPoolvisitor = 72 ClassSpecificationVisitorFactory.createClassPoolVisitor(configuration.keep, 73 keepMarker, 74 keepMarker, 75 true, 76 true, 77 true); 78 // Mark the seeds. 79 programClassPool.accept(classPoolvisitor); 80 libraryClassPool.accept(classPoolvisitor); 81 82 // Print out the seeds. 83 SimpleClassPrinter printer = new SimpleClassPrinter(false, ps); 84 programClassPool.classesAcceptAlphabetically(new MultiClassVisitor( 85 new ClassVisitor[] 86 { 87 new KeptClassFilter(printer), 88 new AllMemberVisitor(new KeptMemberFilter(printer)) 89 })); 90 } 91 }