/*
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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.ClassPool;
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import proguard.classfile.visitor.*;
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import proguard.optimize.*;
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import java.io.*;
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/**
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* This class prints out the seeds specified by keep options.
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*
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* @author Eric Lafortune
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*/
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public class SeedPrinter
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{
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private final PrintStream ps;
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/**
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* Creates a new ConfigurationWriter for the given PrintStream.
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*/
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public SeedPrinter(PrintStream ps) throws IOException
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{
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this.ps = ps;
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}
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/**
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* Prints out the seeds for the classes in the given program class pool.
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* @param configuration the configuration containing the keep options.
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* @throws IOException if an IO error occurs while writing the configuration.
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*/
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public void write(Configuration configuration,
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ClassPool programClassPool,
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ClassPool libraryClassPool) throws IOException
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{
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// Check if we have at least some keep commands.
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if (configuration.keep == null)
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{
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throw new IOException("You have to specify '-keep' options for the shrinking step.");
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}
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// Clean up any old visitor info.
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programClassPool.classesAccept(new ClassCleaner());
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libraryClassPool.classesAccept(new ClassCleaner());
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// Create a visitor for printing out the seeds. We're printing out
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// the program elements that are preserved against shrinking,
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// optimization, or obfuscation.
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KeepMarker keepMarker = new KeepMarker();
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ClassPoolVisitor classPoolvisitor =
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ClassSpecificationVisitorFactory.createClassPoolVisitor(configuration.keep,
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keepMarker,
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keepMarker,
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true,
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true,
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true);
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// Mark the seeds.
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programClassPool.accept(classPoolvisitor);
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libraryClassPool.accept(classPoolvisitor);
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// Print out the seeds.
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SimpleClassPrinter printer = new SimpleClassPrinter(false, ps);
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programClassPool.classesAcceptAlphabetically(new MultiClassVisitor(
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new ClassVisitor[]
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{
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new KeptClassFilter(printer),
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new AllMemberVisitor(new KeptMemberFilter(printer))
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}));
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}
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}
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