Class StringTransformFunction

Object
ExpressionAbstract
FunctionImpl
StringTransformFunction
All Implemented Interfaces:
Expression, Function

public class StringTransformFunction extends FunctionImpl
Function that takes an input and applies a text transformation (one of "lowercase", "uppercase", or "none"). The default transformation is "none".

ECQL Examples:
  StringTransform('SoMeString', 'uppercase') evaluates to 'SOMESTRING'
  StringTransform('SoMeString', 'lowercase') evaluates to 'somestring'
  StringTransform('SoMeString', 'none')      evaluates to 'SoMeString'
 
  • Field Details

  • Constructor Details

    • StringTransformFunction

      public StringTransformFunction()
  • Method Details

    • evaluate

      public Object evaluate(Object object)
      Description copied from class: FunctionImpl
      Default implementation simply returns the fallbackValue.

      Please override this method to produce a value based on the provided arguments.

      Specified by:
      evaluate in interface Expression
      Overrides:
      evaluate in class FunctionImpl
      Parameters:
      object - Object being evaluated; often a Feature
      Returns:
      value for the provided object
    • evaluate

      public <T> T evaluate(Object object, Class<T> context)
      Description copied from class: ExpressionAbstract
      Default implementation delegates handling of context conversion to Converters utility class.

      Subclasses are expected to make use of the Converters utility class (as the easiest way to provide value morphing in conformance with the Filter specification).

      Specified by:
      evaluate in interface Expression
      Overrides:
      evaluate in class ExpressionAbstract
      Type Parameters:
      T - The type of the returned object.
      Parameters:
      object - The object to evaluate the expression against.
      context - The type of the resulting value of the expression.
      Returns:
      Evaluates the given expression based on the content of the given object an an instance of context.