Package com.yahoo.search.grouping.request

Class SubFunction

java.lang.Object

com.yahoo.search.grouping.request.GroupingNode

com.yahoo.search.grouping.request.GroupingExpression

com.yahoo.search.grouping.request.FunctionNode

com.yahoo.search.grouping.request.SubFunction

All Implemented Interfaces:

Iterable<GroupingExpression>

public class SubFunction
extends FunctionNode

This class represents a div-function in a GroupingExpression. It evaluates to a number that equals the result of subtracting the results of all arguments in the order they were given to the constructor (subtract second argument from first, third from result, ...).

Author:

Simon Thoresen Hult

Constructor Summary

Constructors

Constructor	Description
SubFunction(GroupingExpression arg1, GroupingExpression arg2, GroupingExpression... argN)	Constructs a new instance of this class.

Method Summary

Modifier and Type	Method	Description
SubFunction	copy()	Returns a deep copy of this
static SubFunction	newInstance(List<GroupingExpression> args)	Constructs a new instance of this class from a list of arguments.

Methods inherited from class com.yahoo.search.grouping.request.FunctionNode

args, asList, asList, asList, getArg, getNumArgs, iterator, resolveLevel, visit

Methods inherited from class com.yahoo.search.grouping.request.GroupingExpression

asImage, asString, getLevel, getLevelOrNull, setLabel

Methods inherited from class com.yahoo.search.grouping.request.GroupingNode

getImage, getLabel, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

SubFunction

public SubFunction(GroupingExpression arg1,
                   GroupingExpression arg2,
                   GroupingExpression... argN)

Constructs a new instance of this class.

Parameters:

arg1 - The first compulsory argument, must evaluate to a number.

arg2 - The second compulsory argument, must evaluate to a number.

argN - The optional arguments, must evaluate to a number.

Method Detail

copy

public SubFunction copy()

Description copied from class: GroupingExpression

Returns a deep copy of this

Specified by:

copy in class GroupingExpression

newInstance

public static SubFunction newInstance(List<GroupingExpression> args)

Constructs a new instance of this class from a list of arguments.

Parameters:

args - The arguments to pass to the constructor.

Returns:

The created instance.

Throws:

IllegalArgumentException - Thrown if the number of arguments is less than 2.