Package org.apache.commons.jexl3

Interface JexlExpression

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 Details

    • 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

    • 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

    • getParsedText

      String getParsedText()
      Recreates the source text of this expression from the internal syntactic tree.
      Returns:
      the source text

    • getSourceText

      String getSourceText()
      Returns the source text of this expression.
      Returns:
      the source text