/*

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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package com.sun.media.sound;

import java.util.Comparator;

import javax.sound.midi.Instrument;

import javax.sound.midi.Patch;

/**

 * Instrument comparator class.

 * Used to order instrument by program, bank, percussion.

 *

 * @author Karl Helgason

 */

public final class ModelInstrumentComparator implements Comparator<Instrument> {

    public int compare(Instrument arg0, Instrument arg1) {

        Patch p0 = arg0.getPatch();

        Patch p1 = arg1.getPatch();

        int a = p0.getBank() * 128 + p0.getProgram();

        int b = p1.getBank() * 128 + p1.getProgram();

        if (p0 instanceof ModelPatch) {

            a += ((ModelPatch)p0).isPercussion() ? 2097152 : 0;

        }

        if (p1 instanceof ModelPatch) {

            b += ((ModelPatch)p1).isPercussion() ? 2097152 : 0;

        }

        return a - b;

    }

}