# Package org.apache.commons.jexl3.internal

Provides utilities for introspection services.

See: Description

- Class Summary
  Class | Description
  --- | ---
  ArrayBuilder | Helper class to create typed arrays.
  Closure | A Script closure.
  Debugger | Helps pinpoint the cause of problems in expressions that fail during evaluation.
  Engine | A JexlEngine implementation.
  Engine.VarCollector | Utility class to collect variables.
  IntegerRange | A range of integers.
  IntegerRange.Ascending | Ascending integer range.
  IntegerRange.Descending | Descending integer range.
  Interpreter | An interpreter of JEXL syntax.
  LongRange | A range of longs.
  LongRange.Ascending | Ascending long range.
  LongRange.Descending | Descending long range.
  MapBuilder | Helper class to create map literals.
  Operators | Helper class to deal with operator overloading and specifics.
  Scope | A script scope, stores the declaration of parameters and local variables as symbols.
  Scope.Frame | A call frame, created from a scope, stores the arguments and local variables in a "stack frame" (sic).
  Script | A JexlScript implementation.
  Script.Curried | A script whose parameters are (partially) bound.
  SetBuilder | Helper class to create set literals.
  TemplateDebugger | A visitor for templates.
  TemplateEngine | A JxltEngine implementation.
  TemplateInterpreter | The type of interpreter to use during evaluation of templates.
  TemplateScript | A Template instance.

## Package org.apache.commons.jexl3.internal Description

## Provides utilities for introspection services.

This internal package is not intended for public usage and there is no guarantee that its public classes or methods will remain as is in subsequent versions.

This set of classes implement the various forms of setters and getters used by JEXL. These are specialized forms for 'pure' properties, discovering methods of the {s,g}etProperty form, for Maps, Lists and Ducks - attempting to discover a 'get' or 'set' method, making an object walk and quack.

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