Package com.yahoo.searchlib.rankingexpression.rule

Class NegativeNode

java.lang.Object

com.yahoo.searchlib.rankingexpression.rule.ExpressionNode

com.yahoo.searchlib.rankingexpression.rule.CompositeNode

com.yahoo.searchlib.rankingexpression.rule.NegativeNode

All Implemented Interfaces:

java.io.Serializable

public class NegativeNode
extends CompositeNode

A node which flips the sign of the value produced from the nested expression

Author:

bratseth

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
NegativeNode(ExpressionNode value)	Constructs a new negative node

Method Summary

Modifier and Type	Method	Description
java.util.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	getValue()	Returns the node creating the value negated by this
NegativeNode	setChildren(java.util.List<ExpressionNode> children)	Returns a copy of this where the children is replaced by the given children.
java.lang.StringBuilder	toString(java.lang.StringBuilder string, SerializationContext context, java.util.Deque<java.lang.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

NegativeNode

public NegativeNode(ExpressionNode value)

Constructs a new negative node

Method Detail

getValue

public ExpressionNode getValue()

Returns the node creating the value negated by this

children

public java.util.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.

toString

public java.lang.StringBuilder toString(java.lang.StringBuilder string,
                                        SerializationContext context,
                                        java.util.Deque<java.lang.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 NegativeNode setChildren(java.util.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