Package com.singularsys.extensions.xjep

Class Subst

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.extensions.xjep.Subst

All Implemented Interfaces:

CommandVisitorI, JepComponent, PostfixMathCommandI, Serializable

public class Subst
extends PostfixMathCommand
implements CommandVisitorI, JepComponent

Jep functions which adds a substitute(eqn,sub) preprocessing operator to perform symbolic substitution. For example

 subst(x*y*z,y=x+1,z=x-1)
 

Will return x*(x+1.0)*(x-1.0).

See Also:

• CommandVisitorI
• SubstitutionVisitor
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected NodeFactory	nf
protected OperatorTableI	ot
protected SubstitutionVisitor	subv

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

curNumberOfParameters, description, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
Subst()
Subst(XJep xjep)
Subst(SubstitutionVisitor subv)

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)	Performs the specified action on an expression tree.

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

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, asType, checkNumberOfParameters, getDescription, getDescription, getDescriptionWithType, getName, getNumberOfParameters, run, setCurNumberOfParameters, setDescription, setName, toString, toString

Methods inherited from class java.lang.Object

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

Field Details

subv

protected SubstitutionVisitor subv

nf

protected NodeFactory nf

ot

protected OperatorTableI ot

Constructor Details

Subst

public Subst(XJep xjep)

Subst

public Subst()

Subst

public Subst(SubstitutionVisitor subv)

Method Details

process

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

Description copied from interface: CommandVisitorI

Performs the specified action on an expression tree.

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 method 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:

either a new instance, null or 'this'.