MBString (Geotools modules 30-SNAPSHOT API)

Object
- ExpressionAbstract
- - FunctionImpl
  - - MBExpression
    - - MBString

All Implemented Interfaces:

Expression, Function
```
public class MBString
extends MBExpression
```
This class is an extension of the MBExpression containing the functions to support MapBox Style String expressions. String operators "concat", "upcase", and "downcase" are used to manipulate strings within a style.

Field Summary
- Fields inherited from class MBExpression
  colors, decisions, featureData, ff, heatMap, json, lookUp, math, name, parse, ramps, string, transformer, types, variableBindings, zoom
- Fields inherited from class FunctionImpl
  functionName
- Fields inherited from interface Expression
  NIL

Constructor Summary

Constructors
Constructor Description

MBString(JSONArray json)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Expression`	`getExpression()`	Will return a function base on the mbexpression string name;
`Expression`	`stringConcat()`	Returns a string consisting of the concatenation of the inputs.
`Expression`	`stringDowncase()`	Returns the input string converted to lowercase.
`Expression`	`stringUpcase()`	Returns the input string converted to uppercase.

Methods inherited from class MBExpression
canCreate, create, getName, throwInsufficientArgumentCount, throwUnexpectedArgumentCount, transformExpression, transformLiteral

Methods inherited from class FunctionImpl
accept, dispatchArguments, equals, evaluate, functionName, getFallbackValue, getFunctionName, getParameters, getParameterValue, getParameterValue, hashCode, setFallbackValue, setName, setParameters, toString

Methods inherited from class ExpressionAbstract
evaluate

Methods inherited from class Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Expression
evaluate

- Constructor Detail
  - MBString
```
public MBString(JSONArray json)
```
- Method Detail
  - stringConcat
```
public Expression stringConcat()
                        throws MBFormatException
```
    Returns a string consisting of the concatenation of the inputs. Example: ["concat", string, string, ...]: string
    
    Returns:
    
    concatenate expression
    
    Throws:
    
    MBFormatException
  - stringDowncase
```
public Expression stringDowncase()
```
    Returns the input string converted to lowercase. Follows the Unicode Default Case Conversion algorithm and the locale-insensitive case mappings in the Unicode Character Database. Example: ["downcase", string]: string
    
    Returns:
    
    downcase string expression
  - stringUpcase
```
public Expression stringUpcase()
```
    Returns the input string converted to uppercase. Follows the Unicode Default Case Conversion algorithm and the locale-insensitive case mappings in the Unicode Character Database. ["upcase", string]: string
    
    Returns:
    
    uppercase string expression
  - getExpression
```
public Expression getExpression()
```
    Will return a function base on the mbexpression string name;
    
    Specified by:
    
    getExpression in class MBExpression
    
    Returns:
    
    expression based on mbexpression string name