Class FallbackFunction

All Implemented Interfaces:
Expression, Function, FunctionExpression, Factory

public class FallbackFunction extends FunctionExpressionImpl
A placeholder class used to track a function the user requested that is not supported by our java implementation.

This can be used to construct expressions that are to be executed by another systems (say as SQL or as a WFS request).

Author:
Jody Garnett
  • Constructor Details

  • Method Details

    • evaluate

      public Object evaluate(Object object)
      Description copied from class: ExpressionAbstract
      Subclass should override, default implementation returns null.
      Specified by:
      evaluate in interface Expression
      Overrides:
      evaluate in class FunctionExpressionImpl
      Returns:
      default implementation returns null
    • 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.