bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/commands/CaptureEvent.java

/************************************************************************
Copyright (c) 2003 IBM Corporation and others.
All rights reserved.   This program and the accompanying materials
are made available under the terms of the Common Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v10.html

Contributors:
	IBM - Initial implementation
************************************************************************/

package org.eclipse.ui.internal.commands;

import java.util.Arrays;

public final class CaptureEvent implements Comparable {

	private final static int HASH_FACTOR = 27;
	private final static int HASH_INITIAL = 37;

	public static CaptureEvent create(int data, int pen, Point[] points)
		throws IllegalArgumentException {
		return new CaptureEvent(data, pen, points);
	}

	private int data;
	private int pen;
	private Point[] points;

	private CaptureEvent(int data, int pen, Point[] points)
		throws IllegalArgumentException {
		super();
		this.data = data;
		this.pen = pen;

		if (points == null)
			throw new IllegalArgumentException();
		
		points = (Point[]) points.clone();

		for (int i = 0; i < points.length; i++)
			if (points[i] == null)
				throw new IllegalArgumentException();
	
		this.points = points;
	}

	public int compareTo(Object object) {
		CaptureEvent captureEvent = (CaptureEvent) object;
		int compareTo = data - captureEvent.data;

		if (compareTo == 0) {
			compareTo = pen - captureEvent.pen;

			if (compareTo == 0)
				compareTo = Util.compare(points, captureEvent.points);
		}

		return compareTo;
	}

	public boolean equals(Object object) {
		if (!(object instanceof CaptureEvent))
			return false;

		CaptureEvent captureEvent = (CaptureEvent) object;
		return data == captureEvent.data && pen == captureEvent.pen && Arrays.equals(points, captureEvent.points);
	}

	public int getData() {
		return data;
	}

	public int getPen() {
		return pen;
	}

	public Point[] getPoints() {
		return (Point[]) points.clone();
	}

	public int hashCode() {
		int result = HASH_INITIAL;
		result = result * HASH_FACTOR + data;
		result = result * HASH_FACTOR + pen;

		for (int i = 0; i < points.length; i++)
			result = result * HASH_FACTOR + points[i].hashCode();
		
		return result;
	}
}