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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * accompanied this code).
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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/**
 * 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;
    }
}