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)
ConstantNode(Value value, String sourceImage)	Deprecated.

Method Summary

Modifier and Type	Method	Description
Value	evaluate(Context context)	Returns the value of evaluating this expression over the given context.
Value	getValue()
String	sourceString()	Deprecated.
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

ConstantNode

public ConstantNode(Value value)

ConstantNode

@Deprecated
public ConstantNode(Value value,
                    String sourceImage)

Deprecated.

Creates a constant value

Parameters:

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

sourceImage - the source string image producing this value

Method Detail

getValue

public Value getValue()

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.

sourceString

@Deprecated
public String sourceString()

Deprecated.

Returns the string which created this, or the value.toString() if not known

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