Package com.singularsys.jep.walkers

Class ExpressionConsolidator

java.lang.Object

com.singularsys.jep.walkers.DoNothingVisitor

com.singularsys.jep.walkers.DeepCopyVisitor

com.singularsys.jep.walkers.ExpressionConsolidator

All Implemented Interfaces:

JepComponent, ParserVisitor, Serializable

public class ExpressionConsolidator
extends DeepCopyVisitor

Consolidates nested addition and multiplication to produce nary operators. For example (x+y)+z -> +(x,y,z)

Author:

Richard Morris

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected final List<Operator>	ops

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

ft, jep, nf, ot, vt

Constructor Summary

Constructors

Constructor	Description
ExpressionConsolidator(Jep j)	Default constructor, Add and Multiply are consolidated.

Method Summary

Modifier and Type	Method	Description
boolean	add(Operator op)	Adds an addition operator to be consolidated.
Node	consolidate(Node node)
protected Node[]	consolidateChildren(Operator op, Node[] children)	Creates an array of Nodes, if the child is an ASTOpNode whose operator is op, then the children of that child will be added otherwise the child is added.
List<Operator>	getOps()	The list of operators which are consolidated
Object	visit(ASTOpNode node, Object data)	Visit an operator 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

Field Details

ops

protected final List<Operator> ops

Constructor Details

ExpressionConsolidator

public ExpressionConsolidator(Jep j)

Default constructor, Add and Multiply are consolidated.

Parameters:

j -

Method Details

consolidate

public Node consolidate(Node node)
                 throws JepException

Throws:

JepException

consolidateChildren

protected Node[] consolidateChildren(Operator op,
 Node[] children)

Creates an array of Nodes, if the child is an ASTOpNode whose operator is op, then the children of that child will be added otherwise the child is added.

Parameters:

op -

children -

Returns:

a new list of nodes

visit

public Object visit(ASTOpNode node,
 Object data)
             throws JepException

Description copied from class: DoNothingVisitor

Visit an operator node. Can be overridden by subclasses.

Specified by:

visit in interface ParserVisitor

Overrides:

visit in class DeepCopyVisitor

Throws:

JepException

add

public boolean add(Operator op)

Adds an addition operator to be consolidated.

Parameters:

op - operator to use

Returns:

true

getOps

public List<Operator> getOps()

The list of operators which are consolidated

Returns:

the list