Package com.yahoo.searchlib.rankingexpression.rule

Class ConstantNode

java.lang.Object

com.yahoo.searchlib.rankingexpression.rule.ExpressionNode

com.yahoo.searchlib.rankingexpression.rule.ConstantNode

All Implemented Interfaces:

Serializable

public final class ConstantNode
extends ExpressionNode

A node which holds a constant (frozen) value.

Author:

Simon Thoresen Hult

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ConstantNode(Value value)	Creates a constant value

Method Summary

Modifier and Type	Method	Description
Value	evaluate(Context context)	Returns the value of evaluating this expression over the given context.
Value	getValue()
int	hashCode()	Returns a hashcode computed from the data in this
StringBuilder	toString(StringBuilder string, SerializationContext context, Deque<String> path, CompositeNode parent)	Returns this in serialized form.
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, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Details

ConstantNode

public ConstantNode(Value value)

Creates a constant value

Parameters:

value - the value. Ownership of this value is transferred to this.

Method Details

getValue

public Value getValue()

toString

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

Description copied from class: ExpressionNode

Returns this in serialized form.

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 is 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

hashCode

public int hashCode()

Description copied from class: ExpressionNode

Returns a hashcode computed from the data in this

Specified by:

hashCode in class ExpressionNode