Package org.postgresql.geometric

Class PGpoint

java.lang.Object

org.postgresql.util.PGobject

org.postgresql.geometric.PGpoint

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, org.postgresql.util.PGBinaryObject

public class PGpoint
extends PGobject
implements org.postgresql.util.PGBinaryObject, java.io.Serializable, java.lang.Cloneable

It maps to the point datatype in org.postgresql. This implements a version of java.awt.Point, except it uses double to represent the coordinates.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
double	x	The X coordinate of the point
double	y	The Y coordinate of the point

Fields inherited from class org.postgresql.util.PGobject

type, value

Constructor Summary

Constructors

Constructor	Description
PGpoint()	Required by the driver
PGpoint(double x, double y)
PGpoint(java.lang.String value)	This is called mainly from the other geometric types, when a point is embedded within their definition.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)	This must be overidden to allow comparisons of objects
java.lang.String	getValue()	This must be overidden, to return the value of the object, in the form required by org.postgresql.
int	hashCode()	Compute hash.
int	lengthInBytes()
void	move(double x, double y)	Moves the point to the supplied coordinates.
void	move(int x, int y)	Moves the point to the supplied coordinates.
void	setByteValue(byte[] b, int offset)
void	setLocation(int x, int y)	Moves the point to the supplied coordinates.
void	setLocation(java.awt.Point p)	Moves the point to the supplied java.awt.Point refer to java.awt.Point for description of this
void	setValue(java.lang.String s)	This method sets the value of this object.
void	toBytes(byte[] b, int offset)	Populate the byte array with PGpoint in the binary syntax expected by org.postgresql
void	translate(double x, double y)	Translate the point by the supplied amount.
void	translate(int x, int y)	Translate the point by the supplied amount.

Methods inherited from class java.lang.Object

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

Methods inherited from class org.postgresql.util.PGobject

clone, getType, setType, toString

Field Detail

x

public double x

The X coordinate of the point

y

public double y

The Y coordinate of the point

Constructor Detail

PGpoint

public PGpoint(double x,
               double y)

Parameters:

x - coordinate

y - coordinate

PGpoint

public PGpoint(java.lang.String value)
        throws java.sql.SQLException

This is called mainly from the other geometric types, when a point is embedded within their definition.

Parameters:

value - Definition of this point in PostgreSQL's syntax

Throws:

java.sql.SQLException

PGpoint

public PGpoint()

Required by the driver

Method Detail

setValue

public void setValue(java.lang.String s)
              throws java.sql.SQLException

Description copied from class: PGobject

This method sets the value of this object. It must be overidden.

Overrides:

setValue in class PGobject

Parameters:

s - Definition of this point in PostgreSQL's syntax

Throws:

java.sql.SQLException - on conversion failure

setByteValue

public void setByteValue(byte[] b,
                         int offset)

Specified by:

setByteValue in interface org.postgresql.util.PGBinaryObject

Parameters:

b - Definition of this point in PostgreSQL's binary syntax

equals

public boolean equals(java.lang.Object obj)

Description copied from class: PGobject

This must be overidden to allow comparisons of objects

Overrides:

equals in class PGobject

Parameters:

obj - Object to compare with

Returns:

true if the two points are identical

hashCode

public int hashCode()

Description copied from class: PGobject

Compute hash. As equals() use only value. Return the same hash for the same value.

Overrides:

hashCode in class PGobject

Returns:

Value hashcode, 0 if value is null Objects.hashCode(Object)

getValue

public java.lang.String getValue()

Description copied from class: PGobject

This must be overidden, to return the value of the object, in the form required by org.postgresql.

Overrides:

getValue in class PGobject

Returns:

the PGpoint in the syntax expected by org.postgresql

lengthInBytes

public int lengthInBytes()

Specified by:

lengthInBytes in interface org.postgresql.util.PGBinaryObject

toBytes

public void toBytes(byte[] b,
                    int offset)

Populate the byte array with PGpoint in the binary syntax expected by org.postgresql

Specified by:

toBytes in interface org.postgresql.util.PGBinaryObject

translate

public void translate(int x,
                      int y)

Translate the point by the supplied amount.

Parameters:

x - integer amount to add on the x axis

y - integer amount to add on the y axis

translate

public void translate(double x,
                      double y)

Translate the point by the supplied amount.

Parameters:

x - double amount to add on the x axis

y - double amount to add on the y axis

move

public void move(int x,
                 int y)

Moves the point to the supplied coordinates.

Parameters:

x - integer coordinate

y - integer coordinate

move

public void move(double x,
                 double y)

Moves the point to the supplied coordinates.

Parameters:

x - double coordinate

y - double coordinate

setLocation

public void setLocation(int x,
                        int y)

Moves the point to the supplied coordinates. refer to java.awt.Point for description of this

Parameters:

x - integer coordinate

y - integer coordinate

See Also:

Point

setLocation

public void setLocation(java.awt.Point p)

Moves the point to the supplied java.awt.Point refer to java.awt.Point for description of this

Parameters:

p - Point to move to

See Also:

Point