Package com.yahoo.searchlib.rankingexpression.rule

Class ComparisonNode

java.lang.Object

com.yahoo.searchlib.rankingexpression.rule.ExpressionNode

com.yahoo.searchlib.rankingexpression.rule.CompositeNode

com.yahoo.searchlib.rankingexpression.rule.BooleanNode

com.yahoo.searchlib.rankingexpression.rule.ComparisonNode

All Implemented Interfaces:

Serializable

public class ComparisonNode
extends BooleanNode

A node which returns the outcome of a comparison.

Author:

bratseth

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
ComparisonNode(ExpressionNode leftCondition, TruthOperator operator, ExpressionNode rightCondition)

Method Summary

Modifier and Type	Method	Description
List<ExpressionNode>	children()	Returns a read-only list containing the immediate children of this composite
Value	evaluate(Context context)	Returns the value of evaluating this expression over the given context.
ExpressionNode	getLeftCondition()
TruthOperator	getOperator()
ExpressionNode	getRightCondition()
ComparisonNode	setChildren(List<ExpressionNode> children)	Returns a copy of this where the children is replaced by the given children.
StringBuilder	toString(StringBuilder string, SerializationContext context, Deque<String> path, CompositeNode parent)	Returns a script instance of this based on the supplied script functions.
com.yahoo.tensor.TensorType	type(com.yahoo.tensor.evaluation.TypeContext<Reference> context)	Returns the type this will return if evaluated with the given context.

Methods inherited from class com.yahoo.searchlib.rankingexpression.rule.ExpressionNode

equals, hashCode, toString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ComparisonNode

public ComparisonNode(ExpressionNode leftCondition,
                      TruthOperator operator,
                      ExpressionNode rightCondition)

Method Detail

children

public List<ExpressionNode> children()

Description copied from class: CompositeNode

Returns a read-only list containing the immediate children of this composite

Specified by:

children in class CompositeNode

Returns:

The children of this.

getOperator

public TruthOperator getOperator()

getLeftCondition

public ExpressionNode getLeftCondition()

getRightCondition

public ExpressionNode getRightCondition()

toString

public StringBuilder toString(StringBuilder string,
                              SerializationContext context,
                              Deque<String> path,
                              CompositeNode parent)

Description copied from class: ExpressionNode

Returns a script instance of this based on the supplied script functions.

Specified by:

toString in class ExpressionNode

Parameters:

string - the StringBuilder that will be appended to

context - the serialization context

path - the call path to this, used for cycle detection, or null if this is a root

parent - the parent node of this, or null if it a root

Returns:

the main script, referring to script instances.

type

public com.yahoo.tensor.TensorType type(com.yahoo.tensor.evaluation.TypeContext<Reference> context)

Description copied from class: ExpressionNode

Returns the type this will return if evaluated with the given context.

Specified by:

type in class ExpressionNode

Parameters:

context - the variable type bindings to use for this evaluation

evaluate

public Value evaluate(Context context)

Description copied from class: ExpressionNode

Returns the value of evaluating this expression over the given context.

Specified by:

evaluate in class ExpressionNode

Parameters:

context - the variable bindings to use for this evaluation

setChildren

public ComparisonNode setChildren(List<ExpressionNode> children)

Description copied from class: CompositeNode

Returns a copy of this where the children is replaced by the given children.

Specified by:

setChildren in class CompositeNode