Module is.codion.common.core

Package is.codion.common.value

Interface ObservableValueCollection<T,C extends Collection<T>>

Type Parameters:

T - the values type

C - the collection type

All Superinterfaces:

Iterable<T>, Observable<C>, Observer<C>

All Known Subinterfaces:

ObservableValueList<T>, ObservableValueSet<T>, ValueCollection<T,C>, ValueList<T>, ValueSet<T>

public interface ObservableValueCollection<T,C extends Collection<T>>
extends Observable<C>, Iterable<T>

A read only values observable

Method Summary

Modifier and Type	Method	Description
boolean	contains(@Nullable T value)	Returns true if this ValueCollection instance contains the specified element
boolean	containsAll(Collection<T> values)	Returns true if this ValueCollection instance contains all the elements of the specified collection
@NonNull C	get()
boolean	isEmpty()
Optional<C>	optional()
int	size()

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Methods inherited from interface is.codion.common.observer.Observable

addConsumer, addListener, addWeakConsumer, addWeakListener, getOrThrow, getOrThrow, is, isNot, isNull, isNullable, observer, removeConsumer, removeListener, removeWeakConsumer, removeWeakListener

Method Details

get

@NonNull C get()

Specified by:

get in interface Observable<T>

Returns:

the value

contains

boolean contains(@Nullable T value)

Returns true if this ValueCollection instance contains the specified element

Parameters:

value - the element

Returns:

true if this ValueCollection instance contains the specified element

containsAll

boolean containsAll(Collection<T> values)

Returns true if this ValueCollection instance contains all the elements of the specified collection

Parameters:

values - the elements to check

Returns:

true if this ValueCollection instance contains all the elements of the specified collection

isEmpty

boolean isEmpty()

Returns:

true if this ValueCollection instance is empty

size

int size()

Returns:

the number of elements in this ValueCollection instance

optional

Optional<C> optional()

Specified by:

optional in interface Observable<T>

Returns:

the values or an empty Optional if the collection is empty.