com.singularsys.extensions.xjep

Class EquationExtractor

java.lang.Object

com.singularsys.jep.walkers.DoNothingVisitor

com.singularsys.jep.walkers.DeepCopyVisitor

com.singularsys.extensions.xjep.EquationExtractor

All Implemented Interfaces:

JepComponent, ParserVisitor, java.io.Serializable

Direct Known Subclasses:

DEquationExtractor

public class EquationExtractor
extends DeepCopyVisitor

Extract equations for symbolic variables. If y is a variable which has an equation it will be replaced by its equation.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.walkers.DoNothingVisitor

ft, jep, nf, ot, vt

Constructor Summary

Constructors

Constructor and Description
EquationExtractor()
EquationExtractor(XJep j)

Method Summary

Modifier and Type	Method and Description
Node	replaceRHSVariablesByEquations(Node node) Replace variables on the right had side of an assignment by their equations
Node	replaceVariableByExpressions(Node node) Replace all symbolic variable by their equations
java.lang.Object	visit(ASTVarNode node, java.lang.Object data) Visit a variable node.

Methods inherited from class com.singularsys.jep.walkers.DeepCopyVisitor

deepCopy, visit, visit, visit

Methods inherited from class com.singularsys.jep.walkers.DoNothingVisitor

childrenHaveChanged, copyChildrenIfNeeded, getFunctionTable, getLightWeightInstance, getNodeFactory, getOperatorTable, getVariableTable, init, visit, visitChildren, visitNode

Methods inherited from class java.lang.Object

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

Constructor Detail

EquationExtractor

public EquationExtractor()

EquationExtractor

public EquationExtractor(XJep j)

Method Detail

replaceVariableByExpressions

public Node replaceVariableByExpressions(Node node)
                                  throws JepException

Replace all symbolic variable by their equations

Parameters:

node - root of expression

Returns:

copy of node with variables replaced by their equations

Throws:

JepException

replaceRHSVariablesByEquations

public Node replaceRHSVariablesByEquations(Node node)
                                    throws JepException

Replace variables on the right had side of an assignment by their equations

Parameters:

node - an equation of the form g:=f^2-1

Returns:

a copy of the node

Throws:

JepException

visit

public java.lang.Object visit(ASTVarNode node,
                              java.lang.Object data)
                       throws JepException

Description copied from class: DoNothingVisitor

Visit a variable node. Can be overridden by sub-classes.

Specified by:

visit in interface ParserVisitor

Overrides:

visit in class DeepCopyVisitor

Throws:

JepException