/*******************************************************************************
 * Copyright (c) 2012, 2013 Association for Decentralized Information Management in
 * Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.g3d.scenegraph.structural;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.simantics.db.Resource;
import org.simantics.objmap.structural.IStructuralObject;

@SuppressWarnings("rawtypes")
public abstract class Connection<T extends Connection<T, T2>, T2 extends IComponentNode<T, T2>> implements IStructuralObject{

	private List<T2> connects = new ArrayList<T2>();
	
	public void addConnect(T2 node) {
		if (!connects.contains(node))
			connects.add(node);
		fireChanged(node,true);
	}
	
	@SuppressWarnings("unchecked")
	protected void fireChanged(T2 node, boolean add){
		for (T2 n : connects) {
			n.connectionChanged((T) this,node,add);
		}
	}
	
	public Collection<T2> getConnected() {
		return connects;
	}
	
	public void removeConnect(T2 node) {
		connects.remove(node);
		fireChanged(node,false);
	}
	
	@SuppressWarnings("unchecked")
	public void remove() {
		List<T2> toRemove = new ArrayList<T2>(connects.size());
		toRemove.addAll(connects);
		for (IComponentNode node : toRemove) {
			node.removeConnection((T) this);
		}
	}
	
	public T2 getOther(IComponentNode<T, T2> node) {
		if (connects.size() != 2) 
			return null;
		if (connects.get(0).equals(node))
			return connects.get(1);
		else if (connects.get(1).equals(node))
			return connects.get(0);
		return null;
	}
	
	@Override
	public void setType(Resource type) {
		
	}
	
	@Override
	public Resource getType() {
		return null;
	}
	
	private List<IStructuralObject> ctx = new ArrayList<IStructuralObject>(1);
	@Override
	public List<IStructuralObject> getContext() {
		return ctx;
	}
	
	@Override
	public void setContext(List<IStructuralObject> object) {
		ctx = object;
	}
}