Package org.geotools.styling

Class AbstractContrastMethodStrategy

Object

AbstractContrastMethodStrategy

All Implemented Interfaces:

ContrastMethodStrategy

Direct Known Subclasses:

ExponentialContrastMethodStrategy, HistogramContrastMethodStrategy, LogarithmicContrastMethodStrategy, NormalizeContrastMethodStrategy

public abstract class AbstractContrastMethodStrategy
extends Object
implements ContrastMethodStrategy

Author:

ian

Field Summary

Fields

Modifier and Type	Field	Description
static String	ALGORITHM	ALGORITHM
protected FilterFactory	filterFactory
protected ContrastMethod	method

Constructor Summary

Constructors

Constructor	Description
AbstractContrastMethodStrategy()

Method Summary

Modifier and Type	Method	Description
void	addOption(String key, Expression value)	Add a VendorOption that controls how this strategy operates.
void	addParameter(String key, Expression value)	A parameter to be used by this method.
Expression	getAlgorithm()	Find out the algorithm used by this method.
FilterFactory	getFilterFactory()	Fetch the filter factory used by the method.
ContrastMethod	getMethod()	Get the constant that defines the method that this strategy uses.
Map<String,Expression>	getOptions()	The map of VendorOptions to write into an SLD or CSS file.
Map<String,Expression>	getParameters()	Fetch any parameters which control the method.
String	name()	the name of the ContrastMethod Currently one of Normalize, Histogram, Exponential & Logarithmic
void	setAlgorithm(Expression name)	The algorithm to be used by this method.
void	setMethod(ContrastMethod method)	Set the constant that defines the method that this strategy uses.
void	setOptions(Map<String,Expression> options)	set the map of VendorOptions to control this method.

Methods inherited from class Object

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

Field Detail

ALGORITHM

public static final String ALGORITHM

ALGORITHM

See Also:

Constant Field Values

filterFactory

protected FilterFactory filterFactory

method

protected ContrastMethod method

Constructor Detail

AbstractContrastMethodStrategy

public AbstractContrastMethodStrategy()

Method Detail

setOptions

public void setOptions(Map<String,Expression> options)

set the map of VendorOptions to control this method.

Specified by:

setOptions in interface ContrastMethodStrategy

Parameters:

options - a map of Expressions keyed by name.

getAlgorithm

public Expression getAlgorithm()

Find out the algorithm used by this method.

Returns:

an Expression which evaluates to the algorithm name, may be null;

getParameters

public Map<String,Expression> getParameters()

Fetch any parameters which control the method.

Note this does not contain the algorithm value.

Returns:

a map of Expressions keyed by parameter name.

name

public String name()

the name of the ContrastMethod Currently one of Normalize, Histogram, Exponential & Logarithmic

More methods may be added in future releases.

Returns:

A string containing the name of the method.

getFilterFactory

public FilterFactory getFilterFactory()

Fetch the filter factory used by the method.

Returns:

the filter factory.

addParameter

public void addParameter(String key,
                         Expression value)

A parameter to be used by this method. Subclasses can implement checks for valid parameter names by overriding this method.

Parameters:

key - the name of the parameter

value - the expression that is it's value.

setAlgorithm

public void setAlgorithm(Expression name)

The algorithm to be used by this method. Subclasses can implement checks for valid algorithms by overriding this method.

Parameters:

name - the expression that evaluates to the algorithm name.

getOptions

public Map<String,Expression> getOptions()

The map of VendorOptions to write into an SLD or CSS file.

Specified by:

getOptions in interface ContrastMethodStrategy

Returns:

options a map containing the algorithm name and any parameters that have been set.

getMethod

public ContrastMethod getMethod()

Description copied from interface: ContrastMethodStrategy

Get the constant that defines the method that this strategy uses.

Specified by:

getMethod in interface ContrastMethodStrategy

Returns:

the method that these values relate to.

addOption

public void addOption(String key,
                      Expression value)

Description copied from interface: ContrastMethodStrategy

Add a VendorOption that controls how this strategy operates. All VendorOptions are optional and the strategy will operate using default values if missing.

Specified by:

addOption in interface ContrastMethodStrategy

Parameters:

key - the name of the Vendor Option

value - an expression that evaluates to the value of the option.

setMethod

public void setMethod(ContrastMethod method)

Description copied from interface: ContrastMethodStrategy

Set the constant that defines the method that this strategy uses.

Specified by:

setMethod in interface ContrastMethodStrategy

Parameters:

method - the method to set