Package org.geotools.coverage.processing.operation

Class Scale

Object

AbstractOperation

Operation2D

OperationJAI

BaseScaleOperationJAI

Scale

All Implemented Interfaces:

Serializable, Operation

public class Scale
extends BaseScaleOperationJAI

This operation is simply a wrapper for the JAI scale operation which allows me to arbitrarily scale and translate a rendered image.

Since:

2.3

Author:

Simone Giannecchini

See Also:

• ScaleDescriptor
• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class OperationJAI

OperationJAI.Parameters

Field Summary

Fields inherited from class BaseScaleOperationJAI

AFFINE, ROI, SCALE, TRANSLATE, WARP

Fields inherited from class OperationJAI

operation, RENDERED_MODE

Fields inherited from class Operation2D

PRIMARY_SOURCE_INDEX, SOURCE_0

Fields inherited from class AbstractOperation

descriptor

Constructor Summary

Constructors

Constructor	Description
Scale()	Default constructor.

Method Summary

Modifier and Type	Method	Description
protected RenderedImage	createRenderedImage(ParameterBlockJAI parameters, RenderingHints hints)	Applies the JAI operation.
protected Map<String,?>	getProperties(RenderedImage data, CoordinateReferenceSystem crs, InternationalString name, MathTransform gridToCRS, GridCoverage2D[] sources, OperationJAI.Parameters parameters)	Prepares the properties to be given to the coverage created by the deriveGridCoverage method.
protected void	handleJAIEXTParams(ParameterBlockJAI parameters, ParameterValueGroup parameters2)	Extension point for adding to the JAI ParameterBlockJAI object the parameters defined in the ParameterValueGroup, which can be read by the JAI-EXT operations.

Methods inherited from class BaseScaleOperationJAI

deriveGridCoverage

Methods inherited from class OperationJAI

deriveCategory, deriveName, deriveRange, deriveSampleDimension, deriveUnit, doOperation, equals, extractSources, getJAI, getOperationDescriptor, getQuantitative, handleROINoDataInternal, handleROINoDataProperties, hashCode, prepareParameters, resampleToCommonGeometry

Methods inherited from class Operation2D

extractSources, getFactory

Methods inherited from class AbstractOperation

getDescription, getDocURL, getName, getNumSources, getParameters, getVendor, getVersion, toString

Methods inherited from class Object

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

Constructor Details

Scale

public Scale()

Default constructor.

Method Details

createRenderedImage

protected RenderedImage createRenderedImage(ParameterBlockJAI parameters,
 RenderingHints hints)

Description copied from class: OperationJAI

Applies the JAI operation. The operation name can be fetch from OperationJAI.operation. The JAI instance to use can be fetch from OperationJAI.getJAI(java.awt.RenderingHints). The default implementation returns the following:

 getJAI(hints).createNS(OperationJAI.operation.getName(), parameters, hints)
 

Subclasses may override this method in order to invokes a different JAI operation according the parameters.

Overrides:

createRenderedImage in class OperationJAI

Parameters:

parameters - The parameters to be given to JAI.

hints - The rendering hints to be given to JAI.

Returns:

The result of JAI operation using the given parameters and hints.

handleJAIEXTParams

protected void handleJAIEXTParams(ParameterBlockJAI parameters,
 ParameterValueGroup parameters2)

Description copied from class: OperationJAI

Extension point for adding to the JAI ParameterBlockJAI object the parameters defined in the ParameterValueGroup, which can be read by the JAI-EXT operations.

Notice that if you are using JAI, the new parameters will not be accepted by the ParameterBlockJAI instance.

Overrides:

handleJAIEXTParams in class OperationJAI

Parameters:

parameters - ParameterBlockJAI instance used by the current JAI-EXT/JAI operation

parameters2 - ParameterValueGroup instance containing input operation parameters

getProperties

protected Map<String,?> getProperties(RenderedImage data,
 CoordinateReferenceSystem crs,
 InternationalString name,
 MathTransform gridToCRS,
 GridCoverage2D[] sources,
 OperationJAI.Parameters parameters)

Description copied from class: OperationJAI

Prepares the properties to be given to the coverage created by the deriveGridCoverage method. The default implementation returns null.

Overrides:

getProperties in class OperationJAI

Parameters:

data - The RenderedImage created by this operation.

crs - The coordinate reference system assigned to the coverage this OperationJAI will produce.

name - The name assigned to the coverage this OperationJAI will produce.

gridToCRS - The transform from grid to crs to be assigned to the coverage this OperationJAI will produce.

sources - The sources to be assigned to the coverage this OperationJAI will produce.

parameters - The parameters that were used by this OperationJAI.

Returns:

a Map with the properties generated by this OperationJAI or null if we haven't any.