Package com.yahoo.document.select.rule

Class ComparisonNode

java.lang.Object

com.yahoo.document.select.rule.ComparisonNode

All Implemented Interfaces:

ExpressionNode

public class ComparisonNode
extends Object
implements ExpressionNode

Author:

Simon Thoresen Hult

Constructor Summary

Constructors

Constructor	Description
ComparisonNode(ExpressionNode lhs, String operator, ExpressionNode rhs)	Constructs a new comparison node.

Method Summary

Modifier and Type	Method	Description
void	accept(Visitor visitor)	Perform visitation of this node.
Object	evaluate(Context context)	Evaluate the content of this node based on document object, and return that value.
BucketSet	getBucketSet(BucketIdFactory factory)	Returns the set of bucket ids covered by this node.
ExpressionNode	getLHS()	Returns the left hand side of this comparison.
String	getOperator()	Returns the comparison operator of this.
ExpressionNode	getRHS()	Returns the right hand side of this comparison.
ComparisonNode	setOperator(String operator)	Sets the comparison operator of this.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ComparisonNode

public ComparisonNode(ExpressionNode lhs,
                      String operator,
                      ExpressionNode rhs)

Constructs a new comparison node.

Parameters:

lhs - The left-hand-side of the comparison.

operator - The comparison operator.

rhs - The right-hand-side of the comparison.

Method Detail

getLHS

public ExpressionNode getLHS()

Returns the left hand side of this comparison.

Returns:

The left hand side expression.

getOperator

public String getOperator()

Returns the comparison operator of this.

Returns:

The operator.

setOperator

public ComparisonNode setOperator(String operator)

Sets the comparison operator of this.

Parameters:

operator - The operator string.

Returns:

This, to allow chaining.

getRHS

public ExpressionNode getRHS()

Returns the right hand side of this comparison.

Returns:

The right hand side expression.

getBucketSet

public BucketSet getBucketSet(BucketIdFactory factory)

Description copied from interface: ExpressionNode

Returns the set of bucket ids covered by this node.

Specified by:

getBucketSet in interface ExpressionNode

Parameters:

factory - the factory used by the current application

evaluate

public Object evaluate(Context context)

Description copied from interface: ExpressionNode

Evaluate the content of this node based on document object, and return that value.

Specified by:

evaluate in interface ExpressionNode

Parameters:

context - the document to evaluate over

Returns:

the value of this

accept

public void accept(Visitor visitor)

Description copied from interface: ExpressionNode

Perform visitation of this node.

Specified by:

accept in interface ExpressionNode

Parameters:

visitor - the visitor that wishes to visit the node

toString

public String toString()

Overrides:

toString in class Object