99 lines
2.4 KiB
Java
99 lines
2.4 KiB
Java
//This file is part of SECONDO.
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//Copyright (C) 2004, University in Hagen, Department of Computer Science,
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//Database Systems for New Applications.
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//SECONDO is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//SECONDO is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//You should have received a copy of the GNU General Public License
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//along with SECONDO; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package bbox;
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import java.io.*;
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public class Point implements Serializable{
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/** creates a new Point instance at the given position */
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public Point(double x, double y){
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this.x=x;
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this.y=y;
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}
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/** checks for equality with o */
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public boolean equals(Object o){
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if(!(o instanceof Point))
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return false;
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Point P = (Point)o;
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return P.x==x && P.y==y;
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}
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/** return the x location of this point */
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public double getX(){ return x;}
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/** returns the y locataion of this Point */
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public double getY(){ return y;}
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/** returns a copy of this point */
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public Point copy(){
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return new Point(x,y);
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}
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/** compares this with P */
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public int compareTo(Point P){
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if(x<P.x)
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return -1;
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if(x>P.x)
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return 1;
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if(y<P.y)
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return -1;
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if(y>P.y)
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return 1;
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return 0;
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}
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/** reads this Point from its byte representation */
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public static Point readFrom(byte[] buffer){
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try{
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ObjectInputStream ois;
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ois = new ObjectInputStream(new ByteArrayInputStream(buffer));
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Point res = (Point) ois.readObject();
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ois.close();
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return res;
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} catch(Exception e){
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return null;
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}
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}
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/** writes this Point to its byte representation */
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public byte[] writeToByteArray(){
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try{
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ByteArrayOutputStream byteout = new ByteArrayOutputStream();
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ObjectOutputStream objectout = new ObjectOutputStream(byteout);
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objectout.writeObject(this);
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objectout.flush();
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byte[] res = byteout.toByteArray();
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objectout.close();
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return res;
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} catch(Exception e){
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return null;
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}
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}
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public int getHashValue(){
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return (int) Math.abs(x*7+y);
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}
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private double x;
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private double y;
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}
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