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ProGuard is a free Java class file shrinker, optimizer, and obfuscator. It removes unused classes, fields, methods, and attributes. It then optimizes the bytecode. It then renames the remaining classes, fields, and methods using short meaningless names. Finally, it preverifies the processed code for Java 6 or for Java Micro Edition.
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/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2009 Eric Lafortune ([email protected])
 *
 * 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;

/**
 * This class represents a keep option with class specification.
 *
 * @author Eric Lafortune
 */
public class KeepClassSpecification extends ClassSpecification
{
    public final boolean markClasses;
    public final boolean markConditionally;
    public final boolean allowShrinking;
    public final boolean allowOptimization;
    public final boolean allowObfuscation;


    /**
     * Creates a new KeepClassSpecification for all possible classes.
     * @param markClasses        specifies whether to mark the classes.
     *                           If false, only class members are marked.
     *                           If true, the classes are marked as well.
     * @param markConditionally  specifies whether to mark the classes and
     *                           class members conditionally. If true, classes
     *                           and class members are marked, on the condition
     *                           that all specified class members are present.
     * @param allowShrinking     specifies whether shrinking is allowed.
     * @param allowOptimization  specifies whether optimization is allowed.
     * @param allowObfuscation   specifies whether obfuscation is allowed.
     */
    public KeepClassSpecification(boolean markClasses,
                                  boolean markConditionally,
                                  boolean allowShrinking,
                                  boolean allowOptimization,
                                  boolean allowObfuscation)
    {
        this.markClasses       = markClasses;
        this.markConditionally = markConditionally;
        this.allowShrinking    = allowShrinking;
        this.allowOptimization = allowOptimization;
        this.allowObfuscation  = allowObfuscation;
    }


    /**
     * Creates a new KeepClassSpecification.
     * @param markClasses        specifies whether to mark the classes.
     *                           If false, only class members are marked.
     *                           If true, the classes are marked as well.
     * @param markConditionally  specifies whether to mark the classes and
     *                           class members conditionally. If true, classes
     *                           and class members are marked, on the condition
     *                           that all specified class members are present.
     * @param allowShrinking     specifies whether shrinking is allowed.
     * @param allowOptimization  specifies whether optimization is allowed.
     * @param allowObfuscation   specifies whether obfuscation is allowed.
     * @param classSpecification the specification of classes and class members.
     */
    public KeepClassSpecification(boolean            markClasses,
                                  boolean            markConditionally,
                                  boolean            allowShrinking,
                                  boolean            allowOptimization,
                                  boolean            allowObfuscation,
                                  ClassSpecification classSpecification)
    {
        super(classSpecification);

        this.markClasses       = markClasses;
        this.markConditionally = markConditionally;
        this.allowShrinking    = allowShrinking;
        this.allowOptimization = allowOptimization;
        this.allowObfuscation  = allowObfuscation;
    }


    // Implementations for Object.

    public boolean equals(Object object)
    {
        if (object == null ||
            this.getClass() != object.getClass())
        {
            return false;
        }

        KeepClassSpecification other = (KeepClassSpecification)object;
        return
            this.markClasses       == other.markClasses       &&
            this.markConditionally == other.markConditionally &&
            this.allowShrinking    == other.allowShrinking    &&
            this.allowOptimization == other.allowOptimization &&
            this.allowObfuscation  == other.allowObfuscation  &&
            super.equals(other);
    }

    public int hashCode()
    {
        return
            (markClasses       ? 0 :  1) ^
            (markConditionally ? 0 :  2) ^
            (allowShrinking    ? 0 :  4) ^
            (allowOptimization ? 0 :  8) ^
            (allowObfuscation  ? 0 : 16) ^
            super.hashCode();
    }

    public Object clone()
    {
//        try
//        {
            return super.clone();
//        }
//        catch (CloneNotSupportedException e)
//        {
//            return null;
//        }
    }
}