infovis.utils
Class RectPool

java.lang.Object
  infovis.utils.RectPool

public class RectPool
extends Object

Pool of rectangle that can be allocated or freed.

Improves speed by avoiding garbage collection of rectangles that are used extensively by the toolkit.

Version:

$Revision: 1.7 $

Author:

Jean-Daniel Fekete

Constructor Summary

RectPool()
Creates a rectangle pool.

Method Summary

Rectangle2D.Float	allocate() Returns an available rectangle from the pool.
static Rectangle2D.Float	allocateRect() Returns an available rectangle.
Rectangle2D.Float	copy(Rectangle2D rect) Returns the copy of a specified rectangle.
static Rectangle2D.Float	copyRect(Rectangle2D rect) Returns the copy of a specified rectangle.
void	free(Shape r) Frees a shape, adding it back to the pool if it is a rectangle.
static void	freeRect(Shape r) Frees a shape, adding it back to the pool if it is a rectangle.
static RectPool	getInstance() Returns the current instance of the Rectangle pool.
String	getStatistics() Returns statistics of use.
boolean	isDebugging() Returns true if debugging the pool.
boolean	isEnabled() Returns true if the pool manages rectangles.
void	reset() Clears the whole pool.
boolean	setDebugging(boolean s) Sets the debugging parameter.
void	setEnabled(boolean enabled) Allow/disallow the pool to manage rectangles.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RectPool

public RectPool()

Creates a rectangle pool.

Method Detail

getInstance

public static RectPool getInstance()

Returns the current instance of the Rectangle pool.

Returns:

the current instance of the Rectangle pool.

allocateRect

public static Rectangle2D.Float allocateRect()

Returns an available rectangle.

Returns:

an available rectangle.

copyRect

public static Rectangle2D.Float copyRect(Rectangle2D rect)

Returns the copy of a specified rectangle.

Parameters:

rect - the rectangle to copy

Returns:

the copy of a specified rectangle.

freeRect

public static void freeRect(Shape r)

Frees a shape, adding it back to the pool if it is a rectangle.

Parameters:

r - the shape

allocate

public Rectangle2D.Float allocate()

Returns an available rectangle from the pool.

Returns:

an available rectangle from the pool.

copy

public Rectangle2D.Float copy(Rectangle2D rect)

Returns the copy of a specified rectangle.

Parameters:

rect - the rectangle to copy

Returns:

the copy of a specified rectangle.

free

public void free(Shape r)

Frees a shape, adding it back to the pool if it is a rectangle.

Parameters:

r - the shape

isDebugging

public boolean isDebugging()

Returns true if debugging the pool.

Returns:

true if debugging the pool.

setDebugging

public boolean setDebugging(boolean s)

Sets the debugging parameter.

Parameters:

s - value of the parameter

Returns:

true if the value changed.

reset

public void reset()

Clears the whole pool.

getStatistics

public String getStatistics()

Returns statistics of use.

Returns:

statistics of use.

isEnabled

public boolean isEnabled()

Returns true if the pool manages rectangles.

Returns:

true if the pool manages rectangles.

setEnabled

public void setEnabled(boolean enabled)

Allow/disallow the pool to manage rectangles.

Parameters:

enabled - set to true if the pool has to manage rectangles, false otherwise.