org.shapelogic.scripting
Class FunctionEvalCalcInvoke<E>

java.lang.Object
  org.shapelogic.scripting.BaseScriptingFunction
      org.shapelogic.scripting.FunctionEvalCalcInvoke<E>

All Implemented Interfaces:

Calc0<E>, CalcInvoke<E>, CalcValue<E>, LazyCalc<E>

public class FunctionEvalCalcInvoke<E>
extends BaseScriptingFunction
implements CalcInvoke<E>

Transform based on an expression in a Scripting language using JSR 223. Requires Groovy to be installed. Need special installation of groovy-engine.jar that need to be downloade from Sun. Requires that the scripting language support the invocable interface.

Author:

Sami Badawi

Field Summary

protected boolean	_dirty
protected E	_value

Fields inherited from class org.shapelogic.scripting.BaseScriptingFunction

_expression, _functionName, _language, _scriptEngine, DEFAULT_LANGUAGE

Constructor Summary

FunctionEvalCalcInvoke(java.lang.String expression)

FunctionEvalCalcInvoke(java.lang.String expression, java.lang.String language)

Method Summary

E	getValue() Starts a lazy calculation.
E	invoke()
boolean	isDirty() When dirty is false that means that the calculated value can be used
void	setup() Currently not super well define used for 2 purposes: Reset: called from the outside if you want to reuse it init: Called from the inside when calculation start to have everything setup maybe the semantic could work for both? TODO: This should be separated better.

Methods inherited from class org.shapelogic.scripting.BaseScriptingFunction

getScriptEngine, put

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_dirty

protected boolean _dirty

_value

protected E _value

Constructor Detail

FunctionEvalCalcInvoke

public FunctionEvalCalcInvoke(java.lang.String expression,
                              java.lang.String language)

FunctionEvalCalcInvoke

public FunctionEvalCalcInvoke(java.lang.String expression)

Method Detail

invoke

public E invoke()

Specified by:

invoke in interface Calc0<E>

isDirty

public boolean isDirty()

Description copied from interface: LazyCalc

When dirty is false that means that the calculated value can be used

Specified by:

isDirty in interface LazyCalc<E>

setup

public void setup()

Description copied from interface: LazyCalc

Currently not super well define used for 2 purposes: Reset: called from the outside if you want to reuse it init: Called from the inside when calculation start to have everything setup maybe the semantic could work for both? TODO: This should be separated better.

Specified by:

setup in interface LazyCalc<E>

getValue

public E getValue()

Description copied from interface: CalcValue

Starts a lazy calculation. If dirty do calc() else return cached value. This should maybe be moved up in the hierarchy

Specified by:

getValue in interface CalcValue<E>