com.singularsys.jep.walkers
Class DeepCopyVisitor

java.lang.Object
  com.singularsys.jep.walkers.DoNothingVisitor
      com.singularsys.jep.walkers.DeepCopyVisitor

All Implemented Interfaces:

JepComponent, ParserVisitor, java.io.Serializable

Direct Known Subclasses:

ExpressionConsolidator

public class DeepCopyVisitor
extends DoNothingVisitor

A Visitor which returns an exact copy of the tree. This class should be extended by visitors which modify trees and creates a new tree.

Author:

Rich Morris Created on 16-Nov-2003

See Also:

Serialized Form

Field Summary

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

ft, jep, nf, ot, vt

Constructor Summary

DeepCopyVisitor()
Constructor to use as a JepComponent.

DeepCopyVisitor(Jep j)
Constructor to use in a standalone context.

Method Summary

Node	deepCopy(Node node) Creates a deepCopy of a Node
java.lang.Object	visit(ASTConstant node, java.lang.Object data) Visit a constant node.
java.lang.Object	visit(ASTFunNode node, java.lang.Object data) Visit a function node.
java.lang.Object	visit(ASTOpNode node, java.lang.Object data) Visit a operator node.
java.lang.Object	visit(ASTVarNode node, java.lang.Object data) Visit a variable node.

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

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

DeepCopyVisitor

public DeepCopyVisitor(Jep j)

Constructor to use in a standalone context.

Parameters:

j - Jep instance to use.

DeepCopyVisitor

public DeepCopyVisitor()

Constructor to use as a JepComponent. DoNothingVisitor.init(Jep) must be called later.

Method Detail

deepCopy

public Node deepCopy(Node node)
              throws JepException

Creates a deepCopy of a Node

Throws:

JepException

visit

public java.lang.Object visit(ASTConstant node,
                              java.lang.Object data)
                       throws ParseException

Description copied from class: DoNothingVisitor

Visit a constant node. Can be overridden buy sub-classes.

Specified by:

visit in interface ParserVisitor

Overrides:

visit in class DoNothingVisitor

Throws:

ParseException

visit

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

Description copied from class: DoNothingVisitor

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

Specified by:

visit in interface ParserVisitor

Overrides:

visit in class DoNothingVisitor

Throws:

JepException

visit

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

Description copied from class: DoNothingVisitor

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

Specified by:

visit in interface ParserVisitor

Overrides:

visit in class DoNothingVisitor

Throws:

JepException

visit

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

Description copied from class: DoNothingVisitor

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

Specified by:

visit in interface ParserVisitor

Overrides:

visit in class DoNothingVisitor

Throws:

ParseException