Class DeferRable
java.lang.Object
org.apache.batik.ext.awt.image.renderable.DeferRable
- All Implemented Interfaces:
RenderableImage
,Filter
This class allows for the return of a proxy object quickly, while a
heavy weight object is constrcuted in a background Thread. This
proxy object will then block if any methods are called on it that
require talking to the source object.
This is actually a particular instance of a very general pattern
this is probably best represented using the Proxy class in the
Reflection APIs.
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Field Summary
Fields inherited from interface java.awt.image.renderable.RenderableImage
HINTS_OBSERVED
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionForward the call (blocking until source is set if need be).Forward the call (blocking until source is set if need be).createScaledRendering
(int w, int h, RenderingHints hints) Forward the call (blocking until source is set if need be).Implement the baseclass method to call getSource() so it will block until we have a real source.getDependencyRegion
(int srcIndex, Rectangle2D outputRgn) Forward the call (blocking until source is set if need be).getDirtyRegion
(int srcIndex, Rectangle2D inputRgn) Forward the call (blocking until source is set if need be).float
float
getMinX()
float
getMinY()
getProperty
(String name) Forward the call (blocking until source is set if need be).String[]
Forward the call (blocking until source is set if need be).Key method that blocks if the src has not yet been provided.long
Returns the current modification timestamp on this Renderable node.float
getWidth()
boolean
Forward the call (blocking until source is set if need be).void
setBounds
(Rectangle2D bounds) void
setProperties
(Map props) void
Key method that sets the src.
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Constructor Details
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DeferRable
public DeferRable()Constructor takes nothing
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Method Details
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getSource
Key method that blocks if the src has not yet been provided. -
setSource
Key method that sets the src. The source can only be set once (this makes sense given the intent of the class is to stand in for a real object, so swaping that object isn't a good idea. This will wake all the threads that might be waiting for the source to be set. -
setBounds
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setProperties
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getTimeStamp
public long getTimeStamp()Description copied from interface:Filter
Returns the current modification timestamp on this Renderable node. This value will change whenever cached output data becomes invalid.- Specified by:
getTimeStamp
in interfaceFilter
- Returns:
- Current modification timestamp value.
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getSources
- Specified by:
getSources
in interfaceRenderableImage
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isDynamic
public boolean isDynamic()Forward the call (blocking until source is set if need be).- Specified by:
isDynamic
in interfaceRenderableImage
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getBounds2D
Implement the baseclass method to call getSource() so it will block until we have a real source.- Specified by:
getBounds2D
in interfaceFilter
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getMinX
public float getMinX()- Specified by:
getMinX
in interfaceRenderableImage
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getMinY
public float getMinY()- Specified by:
getMinY
in interfaceRenderableImage
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getWidth
public float getWidth()- Specified by:
getWidth
in interfaceRenderableImage
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getHeight
public float getHeight()- Specified by:
getHeight
in interfaceRenderableImage
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getProperty
Forward the call (blocking until source is set if need be).- Specified by:
getProperty
in interfaceRenderableImage
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getPropertyNames
Forward the call (blocking until source is set if need be).- Specified by:
getPropertyNames
in interfaceRenderableImage
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createDefaultRendering
Forward the call (blocking until source is set if need be).- Specified by:
createDefaultRendering
in interfaceRenderableImage
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createScaledRendering
Forward the call (blocking until source is set if need be).- Specified by:
createScaledRendering
in interfaceRenderableImage
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createRendering
Forward the call (blocking until source is set if need be).- Specified by:
createRendering
in interfaceRenderableImage
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getDependencyRegion
Forward the call (blocking until source is set if need be).- Specified by:
getDependencyRegion
in interfaceFilter
- Parameters:
srcIndex
- The source to do the dependency calculation for.outputRgn
- The region of output you are interested in generating dependencies for. The is given in the user coordiate system for this node.- Returns:
- The region of input required. This is in the user coordinate system for the source indicated by srcIndex.
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getDirtyRegion
Forward the call (blocking until source is set if need be).- Specified by:
getDirtyRegion
in interfaceFilter
- Parameters:
srcIndex
- The input that inputRgn reflects changes in.inputRgn
- the region of input that has changed, used to calculate the returned shape. This is given in the user coordinate system of the source indicated by srcIndex.- Returns:
- The region of output that would be invalid given a change to inputRgn of the source selected by srcIndex. this is in the user coordinate system of this node.
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