Package com.yahoo.searchlib.rankingexpression.rule

Class FunctionNode

java.lang.Object

com.yahoo.searchlib.rankingexpression.rule.ExpressionNode

com.yahoo.searchlib.rankingexpression.rule.CompositeNode

com.yahoo.searchlib.rankingexpression.rule.FunctionNode

All Implemented Interfaces:

Serializable

public final class FunctionNode
extends CompositeNode

Invocation of a native function.

Author:

Simon Thoresen Hult, bratseth

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
FunctionNode(Function function, ExpressionNode argument)
FunctionNode(Function function, ExpressionNode argument1, ExpressionNode argument2)	Creates a binary function node

Method Summary

Modifier and Type	Method	Description
List<ExpressionNode>	children()	Returns the arguments of this
Value	evaluate(Context context)	Returns the value of evaluating this expression over the given context.
Function	getFunction()
int	hashCode()	Returns a hashcode computed from the data in this
FunctionNode	setChildren(List<ExpressionNode> children)	Returns a new function node with the children replaced by the given children
StringBuilder	toString(StringBuilder b, 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

FunctionNode

public FunctionNode(Function function,
 ExpressionNode argument)

FunctionNode

public FunctionNode(Function function,
 ExpressionNode argument1,
 ExpressionNode argument2)

Creates a binary function node

Method Details

getFunction

public Function getFunction()

children

public List<ExpressionNode> children()

Returns the arguments of this

Specified by:

children in class CompositeNode

Returns:

The children of this.

toString

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

Description copied from class: ExpressionNode

Returns this in serialized form.

Specified by:

toString in class ExpressionNode

Parameters:

b - 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

setChildren

public FunctionNode setChildren(List<ExpressionNode> children)

Returns a new function node with the children replaced by the given children

Specified by:

setChildren in class CompositeNode

hashCode

public int hashCode()

Description copied from class: ExpressionNode

Returns a hashcode computed from the data in this

Specified by:

hashCode in class ExpressionNode