/*
  * Copyright 2007 Sun Microsystems, Inc.  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.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */ 

package com.sun.media.sound;

/**
 * 
 * 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.
 * 
 * @version %I%, %E%
 * @author Karl Helgason
 */ 
public 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 sources;
	}

	public void setSources(ModelSource[] source) {
		this.sources = source;
	}
	
	public void addSource(ModelSource source) {
		ModelSource[] oldsources = sources;
		sources = new ModelSource[oldsources.length + 1];
		for (int i = 0; i < oldsources.length; i++) {
			sources[i] = oldsources[i];
		}
		sources[sources.length - 1] = source;
		
	}
	
}