edu.umn.cs.spatialHadoop.core

Class Point

java.lang.Object

edu.umn.cs.spatialHadoop.core.Point

All Implemented Interfaces:

Shape, TextSerializable, java.lang.Cloneable, java.lang.Comparable<Point>

Direct Known Subclasses:

NASAPoint, OSMPoint

public class Point
extends java.lang.Object
implements Shape, java.lang.Comparable<Point>

A class that holds coordinates of a point.

Author:

aseldawy

Field Summary

Fields

Modifier and Type	Field and Description
double	x
double	y

Constructor Summary

Constructors

Constructor and Description
Point()
Point(double x, double y)
Point(Point s) A copy constructor from any shape of type Point (or subclass of Point)

Method Summary

Methods

Modifier and Type	Method and Description
Point	clone() Returns a clone of this shape
int	compareTo(Point o)
int	compareTo(Shape s)
double	distanceTo(double px, double py) Gets the distance of this shape to the given point.
double	distanceTo(Point s)
void	draw(java.awt.Graphics g, double xscale, double yscale) Draws the shape to the given graphics and scale.
void	draw(java.awt.Graphics g, Rectangle fileMBR, int imageWidth, int imageHeight, double scale) Draws a shape to the given graphics.
boolean	equals(java.lang.Object obj)
void	fromText(Text text) Retrieve information from the given text.
Shape	getIntersection(Shape s)
Rectangle	getMBR() Returns the minimal bounding rectangle of this point.
boolean	isIntersected(Shape s) Returns true if this shape is intersected with the given shape
void	readFields(java.io.DataInput in)
void	set(double x, double y)
java.lang.String	toString()
Text	toText(Text text) Store current object as string in the given text appending text already there.
void	write(java.io.DataOutput out)

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

x

public double x

y

public double y

Constructor Detail

Point

public Point()

Point

public Point(double x,
     double y)

Point

public Point(Point s)

A copy constructor from any shape of type Point (or subclass of Point)

Parameters:

s -

Method Detail

set

public void set(double x,
       double y)

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Throws:

java.io.IOException

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Throws:

java.io.IOException

compareTo

public int compareTo(Shape s)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

distanceTo

public double distanceTo(Point s)

clone

public Point clone()

Description copied from interface: Shape

Returns a clone of this shape

Specified by:

clone in interface Shape

Overrides:

clone in class java.lang.Object

Returns:

getMBR

public Rectangle getMBR()

Returns the minimal bounding rectangle of this point. This method returns the smallest rectangle that contains this point. For consistency with other methods such as Rectangle.isIntersected(Shape), the rectangle cannot have a zero width or height. Thus, we use the method Math.ulp(double) to compute the smallest non-zero rectangle that contains this point. In other words, for a point p the following statement should return true. p.getMBR().isIntersected(p);

Specified by:

getMBR in interface Shape

Returns:

distanceTo

public double distanceTo(double px,
                double py)

Description copied from interface: Shape

Gets the distance of this shape to the given point.

Specified by:

distanceTo in interface Shape

Returns:

getIntersection

public Shape getIntersection(Shape s)

isIntersected

public boolean isIntersected(Shape s)

Description copied from interface: Shape

Returns true if this shape is intersected with the given shape

Specified by:

isIntersected in interface Shape

Returns:

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toText

public Text toText(Text text)

Description copied from interface: TextSerializable

Store current object as string in the given text appending text already there.

Specified by:

toText in interface TextSerializable

fromText

public void fromText(Text text)

Description copied from interface: TextSerializable

Retrieve information from the given text.

Specified by:

fromText in interface TextSerializable

compareTo

public int compareTo(Point o)

Specified by:

compareTo in interface java.lang.Comparable<Point>

draw

public void draw(java.awt.Graphics g,
        Rectangle fileMBR,
        int imageWidth,
        int imageHeight,
        double scale)

Description copied from interface: Shape

Draws a shape to the given graphics.

Specified by:

draw in interface Shape

Parameters:

g - - the graphics or canvas to draw to

fileMBR - - the MBR of the file in which the shape is contained

imageWidth - - width of the image to draw

imageHeight - - height of the image to draw

scale - - the scale used to convert shape coordinates to image coordinates

draw

public void draw(java.awt.Graphics g,
        double xscale,
        double yscale)

Description copied from interface: Shape

Draws the shape to the given graphics and scale.

Specified by:

draw in interface Shape

Parameters:

g - - the graphics to draw the shape to.

xscale - - scale of the image x-axis in terms of pixels per points.

yscale - - scale of the image y-axis in terms of pixels per points.