org.postgresql.geometric

Class PGline

java.lang.Object

org.postgresql.util.PGobject

org.postgresql.geometric.PGline

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class PGline
extends PGobject
implements java.io.Serializable, java.lang.Cloneable

This implements a line represented by the linear equation Ax + By + C = 0

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
double	a Coefficient of x
double	b Coefficient of y
double	c Constant

Fields inherited from class org.postgresql.util.PGobject

type, value

Constructor Summary

Constructors

Constructor and Description
PGline() required by the driver
PGline(double a, double b, double c)
PGline(double x1, double y1, double x2, double y2)
PGline(PGlseg lseg)
PGline(PGpoint p1, PGpoint p2)
PGline(java.lang.String s)

Method Summary

Methods

Modifier and Type	Method and 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.
void	setValue(java.lang.String s) This method sets the value of this object.

Methods inherited from class org.postgresql.util.PGobject

clone, getType, setType, toString

Methods inherited from class java.lang.Object

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

Field Detail

a

public double a

Coefficient of x

b

public double b

Coefficient of y

c

public double c

Constant

Constructor Detail

PGline

public PGline(double a,
      double b,
      double c)

Parameters:

a - coefficient of x

b - coefficient of y

c - constant

PGline

public PGline(double x1,
      double y1,
      double x2,
      double y2)

Parameters:

x1 - coordinate for first point on the line

y1 - coordinate for first point on the line

x2 - coordinate for second point on the line

y2 - coordinate for second point on the line

PGline

public PGline(PGpoint p1,
      PGpoint p2)

Parameters:

p1 - first point on the line

p2 - second point on the line

PGline

public PGline(PGlseg lseg)

Parameters:

lseg - Line segment which calls on this line.

PGline

public PGline(java.lang.String s)
       throws java.sql.SQLException

Parameters:

s - definition of the line in PostgreSQL's syntax.

Throws:

java.sql.SQLException - on conversion failure

PGline

public PGline()

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 the line in PostgreSQL's syntax

Throws:

java.sql.SQLException - on conversion failure

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 lines 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 PGline in the syntax expected by org.postgresql