Package org.openhab.core.items

Class GroupFunction.Equality

java.lang.Object

org.openhab.core.items.GroupFunction.Equality

All Implemented Interfaces:

GroupFunction

Enclosing interface:

GroupFunction

public static class GroupFunction.Equality
extends Object
implements GroupFunction

This is the default group function that does nothing else than to check if all member items have the same state. If this is the case, this state is returned, otherwise UNDEF is returned.

Author:

Kai Kreuzer - Initial contribution

Nested Class Summary

Nested classes/interfaces inherited from interface org.openhab.core.items.GroupFunction

GroupFunction.Equality

Field Summary

Fields inherited from interface org.openhab.core.items.GroupFunction

AND, AVG, COUNT, DEFAULT, EARLIEST, EQUALITY, LATEST, MAX, MEDIAN, MIN, NAND, NOR, OR, SUM, VALID_FUNCTIONS, XOR

Constructor Summary

Constructors

Constructor	Description
Equality()

Method Summary

Modifier and Type	Method	Description
State	calculate(@Nullable Set<Item> items)	Determines the current state of a group based on a list of items
State[]	getParameters()	Returns the parameters of the function as an array.
<T extends State> @Nullable T	getStateAs(@Nullable Set<Item> items, Class<T> stateClass)	Calculates the group state and returns it as a state of the requested type.

Methods inherited from class java.lang.Object

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

Constructor Details

Equality

public Equality()

Method Details

calculate

public State calculate(@Nullable Set<Item> items)

Description copied from interface: GroupFunction

Determines the current state of a group based on a list of items

Specified by:

calculate in interface GroupFunction

Parameters:

items - the items to calculate a group state for

Returns:

the calculated group state

getStateAs

public <T extends State> @Nullable T getStateAs(@Nullable Set<Item> items,
 Class<T> stateClass)

Description copied from interface: GroupFunction

Calculates the group state and returns it as a state of the requested type.

Specified by:

getStateAs in interface GroupFunction

Parameters:

items - the items to calculate a group state for

stateClass - the type in which the state should be returned

Returns:

the calculated group state of the requested type or null, if type is not supported

getParameters

public State[] getParameters()

Description copied from interface: GroupFunction

Returns the parameters of the function as an array.

Specified by:

getParameters in interface GroupFunction

Returns:

the parameters of this function