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/*******************************************************************************

 * Copyright 2005, CHISEL Group, University of Victoria, Victoria, BC, Canada.

 * 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: The Chisel Group, University of Victoria

 *******************************************************************************/

package org.eclipse.zest.layouts.dataStructures;

import java.util.LinkedList;

import java.util.List;

import org.eclipse.zest.layouts.LayoutBendPoint;

import org.eclipse.zest.layouts.LayoutEntity;

import org.eclipse.zest.layouts.LayoutRelationship;

import org.eclipse.zest.layouts.constraints.BasicEdgeConstraints;

import org.eclipse.zest.layouts.constraints.LayoutConstraint;

/**

 * @author Ian Bull

 */

public class InternalRelationship implements LayoutRelationship {

	private LayoutRelationship externalRelationship;

	private InternalNode source;

	private InternalNode destination;

	private Object layoutInfo;

	private List bendPoints = new LinkedList();

	BasicEdgeConstraints basicEdgeConstraints = new BasicEdgeConstraints();

	public InternalRelationship(LayoutRelationship externalRelationship, InternalNode source, InternalNode destination) {

		this.externalRelationship = externalRelationship;

		this.externalRelationship.setLayoutInformation(this);

		this.source = source;

		this.destination = destination;

		this.externalRelationship.populateLayoutConstraint(basicEdgeConstraints);

	}

	public LayoutRelationship getLayoutRelationship() {

		return externalRelationship;

	}

	public InternalNode getSource() {

		if (this.source == null) {

			throw new RuntimeException("Source is null");

		}

		return this.source;

	}

	public InternalNode getDestination() {

		if (this.destination == null) {

			throw new RuntimeException("Dest is null");

		}

		return this.destination;

	}

	public double getWeight() {

		return this.basicEdgeConstraints.weight;

	}

	public boolean isBidirectional() {

		return this.basicEdgeConstraints.isBiDirectional;

	}

	/**

	 * Ensure this is called in order of source to target node position.

	 * @param x

	 * @param y

	 */

	public void addBendPoint(double x, double y) {

		bendPoints.add(new BendPoint(x, y));

	}

	/**

	 * Ensure this is called in order of source to target node position.

	 * Specifies if the bendpoint is a curve control point

	 * @param x

	 * @param y

	 * @param isControlPoint

	 */

	public void addBendPoint(double x, double y, boolean isControlPoint) {

		bendPoints.add(new BendPoint(x, y, isControlPoint));

	}

	public List getBendPoints() {

		return this.bendPoints;

	}

	public void clearBendPoints() {

		// TODO Auto-generated method stub

	}

	public LayoutEntity getDestinationInLayout() {

		// TODO Auto-generated method stub

		return destination;

	}

	public Object getLayoutInformation() {

		// TODO Auto-generated method stub

		return layoutInfo;

	}

	public LayoutEntity getSourceInLayout() {

		// TODO Auto-generated method stub

		return source;

	}

	public void populateLayoutConstraint(LayoutConstraint constraint) {

		// TODO Auto-generated method stub

	}

	public void setBendPoints(LayoutBendPoint[] bendPoints) {

		// TODO Auto-generated method stub

	}

	public void setLayoutInformation(Object layoutInformation) {

		this.layoutInfo = layoutInformation;

	}

	public Object getGraphData() {

		return null;

	}

	public void setGraphData(Object o) {

	}

}