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## org.apache.commons.jexl3
Interface JexlExpression

All Known Implementing Classes:
  Closure, Script, Script.Curried

    public interface JexlExpression

Represents a single JEXL expression.

This simple interface provides access to the underlying textual expression through `getSourceText()`.

An expression is different than a script - it is simply a reference to a single expression, not to multiple statements. This implies 'if','for','while','var' and blocks '{'... '}'are not allowed in expressions.

Do not create classes that implement this interface; delegate or compose instead.

Since:
  1.0

Method Summary
`Callable<Object>` | `callable(JexlContext context)` Creates a Callable from this expression.
`Object` | `evaluate(JexlContext context)` Evaluates the expression with the variables contained in the supplied `JexlContext`.
`String` | `getParsedText()` Recreates the source text of this expression from the internal syntactic tree.
`String` | `getSourceText()` Returns the source text of this expression.

Method Detail

### evaluate

    Object evaluate(JexlContext context)

  Evaluates the expression with the variables contained in the supplied `JexlContext`.

  Parameters:
    `context` - A JexlContext containing variables.
  Returns:
    The result of this evaluation
  Throws:
    `JexlException` - on any error

### getSourceText

    String getSourceText()

  Returns the source text of this expression.

  Returns:
    the source text

### getParsedText

    String getParsedText()

  Recreates the source text of this expression from the internal syntactic tree.

  Returns:
    the source text

### callable

    Callable<Object> callable(JexlContext context)

  Creates a Callable from this expression.

  This allows to submit it to an executor pool and provides support for asynchronous calls.

  The interpreter will handle interruption/cancellation gracefully if needed.

  Parameters:
    `context` - the context
  Returns:
    the callable
  Since:
    3.1

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