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/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
/**
 * @author Denis M. Kishenko
 */
package harmony.java.awt.geom;

import org.apache.harmony.misc.HashCode;

public abstract class Point2D implements Cloneable {

	public static class Float extends Point2D {

		public float x;
		public float y;

		public Float() {
		}

		public Float(float x, float y) {
			this.x = x;
			this.y = y;
		}

		@Override
		public double getX() {
			return x;
		}

		@Override
		public double getY() {
			return y;
		}

		public void setLocation(float x, float y) {
			this.x = x;
			this.y = y;
		}

		@Override
		public void setLocation(double x, double y) {
			this.x = (float) x;
			this.y = (float) y;
		}

		@Override
		public String toString() {
			return getClass().getName() + "[x=" + x + ",y=" + y + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
		}
	}

	public static class Double extends Point2D {

		public double x;
		public double y;

		public Double() {
		}

		public Double(double x, double y) {
			this.x = x;
			this.y = y;
		}

		@Override
		public double getX() {
			return x;
		}

		@Override
		public double getY() {
			return y;
		}

		@Override
		public void setLocation(double x, double y) {
			this.x = x;
			this.y = y;
		}

		@Override
		public String toString() {
			return getClass().getName() + "[x=" + x + ",y=" + y + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
		}
	}

	protected Point2D() {
	}

	public abstract double getX();

	public abstract double getY();

	public abstract void setLocation(double x, double y);

	public void setLocation(Point2D p) {
		setLocation(p.getX(), p.getY());
	}

	public static double distanceSq(double x1, double y1, double x2, double y2) {
		x2 -= x1;
		y2 -= y1;
		return x2 * x2 + y2 * y2;
	}

	public double distanceSq(double px, double py) {
		return Point2D.distanceSq(getX(), getY(), px, py);
	}

	public double distanceSq(Point2D p) {
		return Point2D.distanceSq(getX(), getY(), p.getX(), p.getY());
	}

	public static double distance(double x1, double y1, double x2, double y2) {
		return Math.sqrt(distanceSq(x1, y1, x2, y2));
	}

	public double distance(double px, double py) {
		return Math.sqrt(distanceSq(px, py));
	}

	public double distance(Point2D p) {
		return Math.sqrt(distanceSq(p));
	}

	@Override
	public Object clone() {
		try {
			return super.clone();
		} catch (CloneNotSupportedException e) {
			throw new InternalError();
		}
	}

	@Override
	public int hashCode() {
		HashCode hash = new HashCode();
		hash.append(getX());
		hash.append(getY());
		return hash.hashCode();
	}

	@Override
	public boolean equals(Object obj) {
		if (obj == this) {
			return true;
		}
		if (obj instanceof Point2D) {
			Point2D p = (Point2D) obj;
			return getX() == p.getX() && getY() == p.getY();
		}
		return false;
	}
}