/*

 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.

 * 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,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package com.sun.media.sound;

import java.util.Arrays;

/**

 * Connection blocks are used to connect source variable

 * to a destination variable.

 * For example Note On velocity can be connected to output gain.

 * In DLS this is called articulator and in SoundFonts (SF2) a modulator.

 *

 * @author Karl Helgason

 */

public final class ModelConnectionBlock {

    //

    //   source1 * source2 * scale -> destination

    //

    private final static ModelSource[] no_sources = new ModelSource[0];

    private ModelSource[] sources = no_sources;

    private double scale = 1;

    private ModelDestination destination;

    public ModelConnectionBlock() {

    }

    public ModelConnectionBlock(double scale, ModelDestination destination) {

        this.scale = scale;

        this.destination = destination;

    }

    public ModelConnectionBlock(ModelSource source,

            ModelDestination destination) {

        if (source != null) {

            this.sources = new ModelSource[1];

            this.sources[0] = source;

        }

        this.destination = destination;

    }

    public ModelConnectionBlock(ModelSource source, double scale,

            ModelDestination destination) {

        if (source != null) {

            this.sources = new ModelSource[1];

            this.sources[0] = source;

        }

        this.scale = scale;

        this.destination = destination;

    }

    public ModelConnectionBlock(ModelSource source, ModelSource control,

            ModelDestination destination) {

        if (source != null) {

            if (control == null) {

                this.sources = new ModelSource[1];

                this.sources[0] = source;

            } else {

                this.sources = new ModelSource[2];

                this.sources[0] = source;

                this.sources[1] = control;

            }

        }

        this.destination = destination;

    }

    public ModelConnectionBlock(ModelSource source, ModelSource control,

            double scale, ModelDestination destination) {

        if (source != null) {

            if (control == null) {

                this.sources = new ModelSource[1];

                this.sources[0] = source;

            } else {

                this.sources = new ModelSource[2];

                this.sources[0] = source;

                this.sources[1] = control;

            }

        }

        this.scale = scale;

        this.destination = destination;

    }

    public ModelDestination getDestination() {

        return destination;

    }

    public void setDestination(ModelDestination destination) {

        this.destination = destination;

    }

    public double getScale() {

        return scale;

    }

    public void setScale(double scale) {

        this.scale = scale;

    }

    public ModelSource[] getSources() {

        return Arrays.copyOf(sources, sources.length);

    }

    public void setSources(ModelSource[] source) {

        this.sources = source == null ? no_sources : Arrays.copyOf(source, source.length);

    }

    public void addSource(ModelSource source) {

        ModelSource[] oldsources = sources;

        sources = new ModelSource[oldsources.length + 1];

        System.arraycopy(oldsources, 0, sources, 0, oldsources.length);

        sources[sources.length - 1] = source;

    }

}