Package org.geotools.renderer.lite

Class SynchronizedLabelCache

Object

SynchronizedLabelCache

All Implemented Interfaces:

LabelCache

public class SynchronizedLabelCache
extends Object
implements LabelCache

Allow multiple thread to modify LabelCache.

Author:

Jesse

Constructor Summary

Constructors

Constructor	Description
SynchronizedLabelCache()
SynchronizedLabelCache(LabelCache cache)

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the cache completely
void	clear(String layerId)	Clears the cache of all information relating to the layer identified.
void	disableLayer(String layerId)	Leaves the label information in the cache but ignores it when calculating what labels are drawn.
void	enableLayer(String layerId)	Enable a layer after being disabled.
void	end(Graphics2D graphics, Rectangle displayArea)	Called to indicate that the map is done rendering.
void	endLayer(String layerId, Graphics2D graphics, Rectangle displayArea)	Called to indicate that a layer is done rendering.
List	orderedLabels()	Return a list with all the values in priority order.
void	put(Rectangle2D area)	Reserve the provided geometry prior to sorting out where labels can go.
void	put(String layerId, TextSymbolizer symbolizer, Feature feature, LiteShape2 shape, NumberRange<Double> scaleRange)	Puts a Label in the cache.
void	start()	Called by renderer to indicate that the rendering process is starting.
void	startLayer(String layerId)	Called by renderer to indication the start of rendering a layer.
void	stop()	Tells the cache to stop labelling.

Methods inherited from class Object

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

Constructor Detail

SynchronizedLabelCache

public SynchronizedLabelCache()

SynchronizedLabelCache

public SynchronizedLabelCache(LabelCache cache)

Method Detail

start

public void start()

Description copied from interface: LabelCache

Called by renderer to indicate that the rendering process is starting.

Specified by:

start in interface LabelCache

clear

public void clear()

Description copied from interface: LabelCache

Clears the cache completely

Specified by:

clear in interface LabelCache

clear

public void clear(String layerId)

Description copied from interface: LabelCache

Clears the cache of all information relating to the layer identified.

Specified by:

clear in interface LabelCache

Parameters:

layerId - id of the layer

enableLayer

public void enableLayer(String layerId)

Description copied from interface: LabelCache

Enable a layer after being disabled. If startLayer is called this does not need to be called as start layer implicitely activates the layer.

Specified by:

enableLayer in interface LabelCache

Parameters:

layerId - layer to activate.

end

public void end(Graphics2D graphics,
                Rectangle displayArea)

Description copied from interface: LabelCache

Called to indicate that the map is done rendering. The method may draw labels if appropriate for the labeling algorithm

Specified by:

end in interface LabelCache

Parameters:

graphics - the graphics to draw on.

displayArea - The size of the display area.

endLayer

public void endLayer(String layerId,
                     Graphics2D graphics,
                     Rectangle displayArea)

Description copied from interface: LabelCache

Called to indicate that a layer is done rendering. The method may draw labels if appropriate for the labeling algorithm

Specified by:

endLayer in interface LabelCache

Parameters:

layerId - an id for the layer

graphics - the graphics to draw on.

displayArea - The size of the display area

put

public void put(String layerId,
                TextSymbolizer symbolizer,
                Feature feature,
                LiteShape2 shape,
                NumberRange<Double> scaleRange)

Description copied from interface: LabelCache

Puts a Label in the cache.

Specified by:

put in interface LabelCache

Parameters:

layerId - id indicating the layer the feature is part of

symbolizer - The symbolizer containing the style information

feature - the feature that has the information required for the symbolizer to calculate the required render information.

shape - the shape to be labeled. This is in screen coordinates.

scaleRange - the scaleRange that the symbolizer is legal

put

public void put(Rectangle2D area)

Description copied from interface: LabelCache

Reserve the provided geometry prior to sorting out where labels can go.

This facility is used to reserve an area so that labels do not end up overlapping on screen constructs like scalebars or north arrows etc...

Specified by:

put in interface LabelCache

Parameters:

area - The Area of the screen to reserve (in screen coordinates)

startLayer

public void startLayer(String layerId)

Description copied from interface: LabelCache

Called by renderer to indication the start of rendering a layer. Will add the layer to the set of active layers.

Specified by:

startLayer in interface LabelCache

Parameters:

layerId - an id for the layer

stop

public void stop()

Description copied from interface: LabelCache

Tells the cache to stop labelling.

Specified by:

stop in interface LabelCache

disableLayer

public void disableLayer(String layerId)

Description copied from interface: LabelCache

Leaves the label information in the cache but ignores it when calculating what labels are drawn.

Specified by:

disableLayer in interface LabelCache

Parameters:

layerId - id of the layer to disable.

orderedLabels

public List orderedLabels()

Description copied from interface: LabelCache

Return a list with all the values in priority order. Both grouped and non-grouped

Specified by:

orderedLabels in interface LabelCache

Returns:

list with all values in priority order