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org.apache.commons.jexl3.internal
Class Closure

java.lang.Object
  extended by org.apache.commons.jexl3.internal.Script
      extended by org.apache.commons.jexl3.internal.Closure
All Implemented Interfaces:
JexlExpression, JexlScript
public class Closure
extends Script

A Script closure.

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.commons.jexl3.internal.Script
Script.Callable, Script.Curried
 
Field Summary
protected  Scope.Frame frame
          The frame.
 
Fields inherited from class org.apache.commons.jexl3.internal.Script
jexl, script, source, version
 
Constructor Summary
protected Closure(Interpreter theCaller, ASTJexlLambda lambda)
          Creates a closure.
 
Method Summary
 Script.Callable callable(JexlContext context, Object... args)
          Creates a Callable from this script.
 boolean equals(Object obj)
           
 Object evaluate(JexlContext context)
          Evaluates the expression with the variables contained in the supplied JexlContext.
 Object execute(JexlContext context)
          Executes the script with the variables contained in the supplied JexlContext.
 Object execute(JexlContext context, Object... args)
          Executes the script with the variables contained in the supplied JexlContext and a set of arguments corresponding to the parameters used during parsing.
 String getParsedText()
          Recreates the source text of this expression from the internal syntactic tree.
 int hashCode()
           
 void setHoisted(int symbol, Object value)
          Sets the hoisted index of a given symbol, ie the target index of a parent hoisted symbol in this closure's frame.
 String toString()
           
 
Methods inherited from class org.apache.commons.jexl3.internal.Script
callable, checkCacheVersion, createFrame, createInterpreter, curry, getEngine, getLocalVariables, getParameters, getParsedText, getPragmas, getSourceText, getVariables
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

frame

protected final Scope.Frame frame
The frame.

Constructor Detail

Closure

protected Closure(Interpreter theCaller,
                  ASTJexlLambda lambda)
Creates a closure.

Parameters:
theCaller - the calling interpreter
lambda - the lambda
Method Detail

toString

public String toString()
Overrides:
toString in class Script

getParsedText

public String getParsedText()
Description copied from interface: JexlScript
Recreates the source text of this expression from the internal syntactic tree.

Specified by:
getParsedText in interface JexlExpression
Specified by:
getParsedText in interface JexlScript
Overrides:
getParsedText in class Script
Returns:
the source text

hashCode

public int hashCode()
Overrides:
hashCode in class Script

equals

public boolean equals(Object obj)
Overrides:
equals in class Script

setHoisted

public void setHoisted(int symbol,
                       Object value)
Sets the hoisted index of a given symbol, ie the target index of a parent hoisted symbol in this closure's frame.

This is meant to allow a locally defined function to "see" and call itself as a local (hoisted) variable; in other words, this allows recursive call of a function.

Parameters:
symbol - the symbol index (in the caller of this closure)
value - the value to set in the local frame

evaluate

public Object evaluate(JexlContext context)
Description copied from interface: JexlExpression
Evaluates the expression with the variables contained in the supplied JexlContext.

Specified by:
evaluate in interface JexlExpression
Overrides:
evaluate in class Script
Parameters:
context - A JexlContext containing variables.
Returns:
The result of this evaluation

execute

public Object execute(JexlContext context)
Description copied from interface: JexlScript
Executes the script with the variables contained in the supplied JexlContext.

Specified by:
execute in interface JexlScript
Overrides:
execute in class Script
Parameters:
context - A JexlContext containing variables.
Returns:
The result of this script, usually the result of the last statement.

execute

public Object execute(JexlContext context,
                      Object... args)
Description copied from interface: JexlScript
Executes the script with the variables contained in the supplied JexlContext and a set of arguments corresponding to the parameters used during parsing.

Specified by:
execute in interface JexlScript
Overrides:
execute in class Script
Parameters:
context - A JexlContext containing variables.
args - the arguments
Returns:
The result of this script, usually the result of the last statement.

callable

public Script.Callable callable(JexlContext context,
                                Object... args)
Description copied from class: Script
Creates a Callable from this script.

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

The interpreter will handle interruption/cancellation gracefully if needed.

Specified by:
callable in interface JexlScript
Overrides:
callable in class Script
Parameters:
context - the context
args - the script arguments
Returns:
the callable
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