ContrastMethodStrategy (Geotools modules 31-SNAPSHOT API)

All Known Implementing Classes:

AbstractContrastMethodStrategy, ExponentialContrastMethodStrategy, HistogramContrastMethodStrategy, LogarithmicContrastMethodStrategy, NormalizeContrastMethodStrategy
```
public interface ContrastMethodStrategy
```
This interface defines the strategy that a ContrastEnhancement will use to execute the ContrastMethod that it has defined. This allows uses to make use of VendorOptions in the SLD (& CSS) to specify an algorithm to apply and named parameters to control how that algorithm operates.

Author:

Ian Turton.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addOption(String key, Expression value)`	Add a VendorOption that controls how this strategy operates.
`ContrastMethod`	`getMethod()`	Get the constant that defines the method that this strategy uses.
`Map<String,Expression>`	`getOptions()`	Return the Map of VendorOptions used by this strategy.
`void`	`setMethod(ContrastMethod method)`	Set the constant that defines the method that this strategy uses.
`void`	`setOptions(Map<String,Expression> options)`	Set the options map - do not set it to null;

- Method Detail
  - addOption
```
void addOption(String key,
               Expression value)
```
    Add a VendorOption that controls how this strategy operates. All VendorOptions are optional and the strategy will operate using default values if missing.
    
    Parameters:
    
    key - the name of the Vendor Option
    
    value - an expression that evaluates to the value of the option.
  - getOptions
```
Map<String,Expression> getOptions()
```
    Return the Map of VendorOptions used by this strategy. This may be empty but should not be null.
    
    Returns:
    
    the options a map of Expressions keyed by name.
  - setOptions
```
void setOptions(Map<String,Expression> options)
```
    Set the options map - do not set it to null;
    
    Parameters:
    
    options - the options to set
  - getMethod
```
ContrastMethod getMethod()
```
    Get the constant that defines the method that this strategy uses.
    
    Returns:
    
    the method
  - setMethod
```
void setMethod(ContrastMethod method)
```
    Set the constant that defines the method that this strategy uses.
    
    Parameters:
    
    method - the method to set