Categorize (Geotools modules 30-SNAPSHOT API)

All Superinterfaces:

Expression, Function
```
@XmlElement("Categorize")
public interface Categorize
extends Function
```
Categorization: The transformation of continuous values to distinct values. This is for example needed to generate choropleth maps from continuous attributes. Another example would be the stepwise selection of different text heights or line widths in dependence from such an attribute.
In case the Categorize (or Interpolate) function is used inside a RasterSymbolizer as a ColorMap, the LookupValue is set to the fixed value “Rasterdata”.

Author:

Johann Sorel (Geomatys)

Field Summary
- Fields inherited from interface Expression
  NIL

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ThreshholdsBelongTo`	`getBelongTo()`	Get the function direction.
`Expression`	`getLookupValue()`	Get lookup value.
`SortedMap<Literal,Literal>`	`getThresholds()`	The Thresholds have to be specified in ascending order and (like the LookupValue) have to be of a uniform and orderable type.

Methods inherited from interface Expression
accept, evaluate, evaluate

Methods inherited from interface Function
getFallbackValue, getFunctionName, getName, getParameters

- Method Detail
  - getLookupValue
```
@XmlElement("LookupValue")
Expression getLookupValue()
```
    Get lookup value.
    
    Returns:
    
    Expression
  - getThresholds
```
SortedMap<Literal,Literal> getThresholds()
```
    The Thresholds have to be specified in ascending order and (like the LookupValue) have to be of a uniform and orderable type. The value of the function is determined by looking up into which interval between two thresholds the LookupValue falls. The first interval ranges from -Infinity to the first given threshold and the last one accordingly from the last threshold to +Infinity.
  - getBelongTo
```
@XmlElement("ThreshholdsBelongTo")
ThreshholdsBelongTo getBelongTo()
```
    Get the function direction. Default is SUCCEEDING.
    
    Returns:
    
    SUCCEEDING or PRECEDING