weka.knowledgeflow.steps

Class FlowByExpression.ExpressionClause

java.lang.Object

weka.knowledgeflow.steps.FlowByExpression.ExpressionNode

weka.knowledgeflow.steps.FlowByExpression.ExpressionClause

All Implemented Interfaces:

Serializable

Enclosing class:

FlowByExpression

public static class FlowByExpression.ExpressionClause
extends FlowByExpression.ExpressionNode
implements Serializable

An expression node that represents a clause of an expression

Author:

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

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FlowByExpression.ExpressionClause.ExpressionType

Constructor Summary

Constructors

Constructor and Description
ExpressionClause()
ExpressionClause(FlowByExpression.ExpressionClause.ExpressionType operator, String lhsAttributeName, String rhsOperand, boolean rhsIsAttribute, boolean isAnOr) Construct a new ExpressionClause

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(Instance inst, boolean result) Evaluate this node and combine with the result so far
String	getLHSAttName() Get the lhs attribute name
FlowByExpression.ExpressionClause.ExpressionType	getOperator() Get the operator
String	getRHSOperand() Get the rhs operand
void	init(Instances structure, Environment env) Initialize the node
boolean	isRHSAnAttribute() Returns true if the RHS is an attribute rather than a constant
void	setLHSAttName(String attName) Set the lhs attribute name
void	setOperator(FlowByExpression.ExpressionClause.ExpressionType opp) Set the operator
void	setRHSIsAnAttribute(boolean rhs) Set whether the RHS is an attribute rather than a constant
void	setRHSOperand(String opp) Set the rhs operand
DefaultMutableTreeNode	toJTree(DefaultMutableTreeNode parent) Get a DefaultMutableTreeNode for this node
String	toString()
void	toStringDisplay(StringBuffer buff) Get the display representation of this node
void	toStringInternal(StringBuffer buff) Get the internal representation of this node

Methods inherited from class weka.knowledgeflow.steps.FlowByExpression.ExpressionNode

isNegated, isOr, setIsOr, setNegated, setShowAndOr

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionClause

public ExpressionClause()

ExpressionClause

public ExpressionClause(FlowByExpression.ExpressionClause.ExpressionType operator,
                        String lhsAttributeName,
                        String rhsOperand,
                        boolean rhsIsAttribute,
                        boolean isAnOr)

Construct a new ExpressionClause

Parameters:

operator - the operator to use

lhsAttributeName - the lhs attribute name

rhsOperand - the rhs operand

rhsIsAttribute - true if the rhs operand is an attribute

isAnOr - true if the result of this expression is to be OR'ed with the result so far

Method Detail

getLHSAttName

public String getLHSAttName()

Get the lhs attribute name

Returns:

the lhs attribute name

setLHSAttName

public void setLHSAttName(String attName)

Set the lhs attribute name

Parameters:

attName - the lhs att naem

getRHSOperand

public String getRHSOperand()

Get the rhs operand

Returns:

the rhs operando

setRHSOperand

public void setRHSOperand(String opp)

Set the rhs operand

Parameters:

opp - the rhs operand to set

isRHSAnAttribute

public boolean isRHSAnAttribute()

Returns true if the RHS is an attribute rather than a constant

Returns:

true if the RHS is an attribute

setRHSIsAnAttribute

public void setRHSIsAnAttribute(boolean rhs)

Set whether the RHS is an attribute rather than a constant

Parameters:

rhs - true if the RHS is an attribute rather than a constant

getOperator

public FlowByExpression.ExpressionClause.ExpressionType getOperator()

Get the operator

Returns:

the operator

setOperator

public void setOperator(FlowByExpression.ExpressionClause.ExpressionType opp)

Set the operator

Parameters:

opp - the operator to use

init

public void init(Instances structure,
                 Environment env)

Description copied from class: FlowByExpression.ExpressionNode

Initialize the node

Overrides:

init in class FlowByExpression.ExpressionNode

Parameters:

structure - the structure of the incoming instances

env - Environment variables

evaluate

public boolean evaluate(Instance inst,
                        boolean result)

Description copied from class: FlowByExpression.ExpressionNode

Evaluate this node and combine with the result so far

Specified by:

evaluate in class FlowByExpression.ExpressionNode

Parameters:

inst - the incoming instance to evalute with

result - the result to combine with

Returns:

the result after combining with this node

toString

public String toString()

Overrides:

toString in class Object

toStringDisplay

public void toStringDisplay(StringBuffer buff)

Description copied from class: FlowByExpression.ExpressionNode

Get the display representation of this node

Specified by:

toStringDisplay in class FlowByExpression.ExpressionNode

Parameters:

buff - the string buffer to append to

toStringInternal

public void toStringInternal(StringBuffer buff)

Description copied from class: FlowByExpression.ExpressionNode

Get the internal representation of this node

Specified by:

toStringInternal in class FlowByExpression.ExpressionNode

Parameters:

buff - the string buffer to append to

toJTree

public DefaultMutableTreeNode toJTree(DefaultMutableTreeNode parent)

Description copied from class: FlowByExpression.ExpressionNode

Get a DefaultMutableTreeNode for this node

Specified by:

toJTree in class FlowByExpression.ExpressionNode

Parameters:

parent - the parent of this node (if any)

Returns:

the DefaultMutableTreeNode for this node