Package com.singularsys.extensions.xjep

Class Eval

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.extensions.xjep.Eval

All Implemented Interfaces:

CommandVisitorI, JepComponent, PostfixMathCommandI, java.io.Serializable

public class Eval
extends PostfixMathCommand
implements CommandVisitorI, JepComponent

Evaluate an expression in the pre-processing stage.

Since:

Jep4.0/Extensions 2.1

See Also:

Preprocess, Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
Eval()
Eval(XJep xjep)

Method Summary

Modifier and Type	Method	Description
JepComponent	getLightWeightInstance()	Gets a light-weight instance suitable for using in multiple threads.
void	init(Jep jep)	Initialize the component.
Node	process(Node node, Node[] children)	Runs the Jep evaluator on the first child.

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, run, setCurNumberOfParameters, setName, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Eval

public Eval()

Eval

public Eval(XJep xjep)

Method Detail

process

public Node process(Node node,
                    Node[] children)
             throws ParseException

Runs the Jep evaluator on the first child.

Specified by:

process in interface CommandVisitorI

Parameters:

node - top node of the tree

children - the children of the node after they have been preprocessed.

Returns:

top node of the results.

Throws:

ParseException

init

public void init(Jep jep)

Description copied from interface: JepComponent

Initialize the component. This methods is called whenever a component is added to Jep. Hence it allows components to keep track of the other components they may rely on.

Specified by:

init in interface JepComponent

Parameters:

jep - the current Jep instance

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

a new instance