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/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * 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.optimize.info;

import proguard.classfile.ProgramClass;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.classfile.visitor.ClassVisitor;

/**
 * This ClassVisitor attaches a ProgramClassOptimizationInfo instance to every
 * class that is not being kept that it visits.
 *
 * @author Eric Lafortune
 */
public class ProgramClassOptimizationInfoSetter
extends      SimplifiedVisitor
implements   ClassVisitor
{
    private final boolean overwrite;


    /**
     * Creates a new ProgramClassOptimizationInfoSetter.
     * Existing visitor info is not overridden.
     */
    public ProgramClassOptimizationInfoSetter()
    {
        this(false);
    }


    /**
     * Creates a new ProgramClassOptimizationInfoSetter.
     *
     * @param overwrite true if existing visitor info should be overridden,
     *                  false otherwise.
     */
    public ProgramClassOptimizationInfoSetter(boolean overwrite)
    {
        this.overwrite = overwrite;
    }

    // Implementations for MemberVisitor.

    public void visitProgramClass(ProgramClass programClass)
    {
        if (programClass.getVisitorInfo() == null || overwrite)
        {
            ProgramClassOptimizationInfo.setProgramClassOptimizationInfo(programClass);
        }
    }
}