Package weka.knowledgeflow.steps

Class FlowByExpression.ExpressionNode

java.lang.Object

weka.knowledgeflow.steps.FlowByExpression.ExpressionNode

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FlowByExpression.BracketNode, FlowByExpression.ExpressionClause

Enclosing class:

FlowByExpression

public abstract static class FlowByExpression.ExpressionNode
extends Object
implements Serializable

Abstract base class for parts of a boolean expression.

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
ExpressionNode()

Method Summary

Modifier and Type	Method	Description
abstract boolean	evaluate(Instance inst, boolean result)	Evaluate this node and combine with the result so far
void	init(Instances structure, Environment env)	Initialize the node
boolean	isNegated()	Get whether this node is negated.
boolean	isOr()	Get whether this node is to be OR'ed
void	setIsOr(boolean isOr)	Set whether this node is to be OR'ed to the result so far
void	setNegated(boolean negated)	Set whether this node is negated
void	setShowAndOr(boolean show)	Set whether to show the combination operator in the textual description
abstract DefaultMutableTreeNode	toJTree(DefaultMutableTreeNode parent)	Get a DefaultMutableTreeNode for this node
abstract void	toStringDisplay(StringBuffer buff)	Get the display representation of this node
abstract void	toStringInternal(StringBuffer buff)	Get the internal representation of this node

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionNode

public ExpressionNode()

Method Detail

setIsOr

public void setIsOr(boolean isOr)

Set whether this node is to be OR'ed to the result so far

Parameters:

isOr - true if this node is to be OR'd

isOr

public boolean isOr()

Get whether this node is to be OR'ed

Returns:

true if this node is to be OR'ed with the result so far

isNegated

public boolean isNegated()

Get whether this node is negated.

Returns:

setNegated

public void setNegated(boolean negated)

Set whether this node is negated

Parameters:

negated - true if this node is negated

setShowAndOr

public void setShowAndOr(boolean show)

Set whether to show the combination operator in the textual description

Parameters:

show - true if the combination operator is to be shown

init

public void init(Instances structure,
                 Environment env)

Initialize the node

Parameters:

structure - the structure of the incoming instances

env - Environment variables

evaluate

public abstract boolean evaluate(Instance inst,
                                 boolean result)

Evaluate this node and combine with the result so far

Parameters:

inst - the incoming instance to evalute with

result - the result to combine with

Returns:

the result after combining with this node

toStringInternal

public abstract void toStringInternal(StringBuffer buff)

Get the internal representation of this node

Parameters:

buff - the string buffer to append to

toStringDisplay

public abstract void toStringDisplay(StringBuffer buff)

Get the display representation of this node

Parameters:

buff - the string buffer to append to

toJTree

public abstract DefaultMutableTreeNode toJTree(DefaultMutableTreeNode parent)

Get a DefaultMutableTreeNode for this node

Parameters:

parent - the parent of this node (if any)

Returns:

the DefaultMutableTreeNode for this node