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SDK de Dispositivo Atlas

Java SDK

Referencia de API

io.realm

Class OrderedRealmCollectionSnapshot

Los SDK de dispositivos Atlas están obsoletos. Consulte deprecation page for details.

io.realm

java.lang.Object

java.util.AbstractCollection

java.util.AbstractList

io.realm.OrderedRealmCollectionImpl

io.realm.OrderedRealmCollectionSnapshot

Un OrderedRealmCollectionSnapshot es un tipo especial de OrderedRealmCollection . Puede ser creado llamando a OrderedRealmCollection.createSnapshot() . A diferencia de RealmResults y RealmList , su tamaño y orden de elementos nunca cambiarán después de la creación.

OrderedRealmCollectionSnapshot es útil al realizar cambios que pueden afectar el tamaño o el orden de la colección en bucles simples. Por ejemplo:

final RealmResults<Dog>  dogs = realm.where(Dog.class).findAll();
final OrderedRealmCollectionSnapshot<Dog> snapshot = dogs.createSnapshot();
final int dogsCount = snapshot.size(); // dogs.size() == snapshot.size() == 10
realm.executeTransaction(new Realm.Transaction() {
    /@Override
    public void execute(Realm realm) {
        for (int i = 0; i < dogsCount; i++) {
        // This won't work since RealmResults is always up-to-date, its size gets decreased by 1 after every loop. An
        // IndexOutOfBoundsException will be thrown after 5 loops.
        // dogs.deleteFromRealm(i);
        snapshot.deleteFromRealm(i); // Deletion on OrderedRealmCollectionSnapshot won't change the size of it.
        }
    }
});

Resumen del método

Modificador y Tipo	Método y descripción
public OrderedRealmCollectionSnapshot	createSnapshot () Creates a snapshot from this OrderedRealmCollection .
public booleano	deleteAllFromRealm () Esto borra todos los objetos en la colección del Realm subyacente.
public booleano	deleteFirstFromRealm () Deletes the first object from the Realm.
public void	deleteFromRealm ( int location ) Deletes the object at the given index from the Realm.
public booleano	deleteLastFromRealm () Deletes the last object from the Realm.
public OrderedRealmCollection	freeze ()
public booleano	isFrozen ()
public booleano	isLoaded () Checks if a collection has finished loading its data yet.
public booleano	load () Blocks the collection until all data are available.
public int	size () Devuelve el número de elementos en este resultado de consulta.
public RealmResults	sort ( java.lang.String[] fieldNames, io.realm.Sort[] sortOrders ) Not supported by OrderedRealmCollectionSnapshot .
public RealmResults	sort ( String fieldName1, Sort sortOrder1, String fieldName2, Sort sortOrder2 ) Not supported by OrderedRealmCollectionSnapshot .
public RealmResults	sort ( String fieldName, Sort sortOrder ) Not supported by OrderedRealmCollectionSnapshot .
public RealmResults	sort ( String fieldName ) Not supported by OrderedRealmCollectionSnapshot .
public RealmQuery	where () Not supported by OrderedRealmCollectionSnapshot .

Inherited Methods

Métodos heredados de la clase java.lang.Object: getClass , hashCode , equals , clone , toString , notify , notifyAll , wait , wait , wait , finalize
Methods inherited from class java.util.AbstractCollection : iterator , size , isEmpty , contains , toArray , toArray , add , remove , containsAll , addAll , removeAll , retainAll , clear , toString
Methods inherited from class java.util.AbstractList : add , get , set , add , remove , indexOf , lastIndexOf , clear , addAll , iterator , listIterator , listIterator , subList , equals , hashCode , removeRange
Methods inherited from class io.realm.OrderedRealmCollectionImpl: isValid , isManaged , contains , get , first , first , last , last , deleteFromRealm , deleteAllFromRealm , iterator , listIterator , listIterator , sort , sort , sort , sort , size , min , minDate , max , maxDate , sum , average , remove , remove , removeAll , set , retainAll , deleteLastFromRealm , deleteFirstFromRealm , clear , add , add , addAll , addAll , createSnapshot , getRealm , getCollectionOperator

Detalle del método

createSnapshot

public OrderedRealmCollectionSnapshot createSnapshot ()
Creates a snapshot from this OrderedRealmCollection . Devuelve the snapshot of this collection. Anulaciones `createSnapshot` en la clase OrderedRealmCollectionImpl

deleteAllFromRealm

public boolean deleteAllFromRealm ()

This deletes all objects in the collection from the underlying Realm. All objects in the collection snapshot will become invalid.

Devuelve

true si se borraron objetos, false de lo contrario.

Throws

IllegalStateException - if the corresponding Realm is closed or in an incorrect thread.
java.lang.IllegalStateException - if the Realm has been closed or called from an incorrect thread.

Anulaciones

deleteAllFromRealm en la clase OrderedRealmCollectionImpl

deleteFirstFromRealm

public boolean deleteFirstFromRealm ()
Deletes the first object from the Realm. The first object will become invalid. Devuelve `true` if an object was deleted, `false` otherwise. Throws java.lang.IllegalStateException - if the Realm is closed or the method is called on the wrong thread. Anulaciones `deleteFirstFromRealm` en la clase OrderedRealmCollectionImpl

deleteFromRealm

public void deleteFromRealm (

int location

)

Deletes the object at the given index from the Realm. The object at the given index will become invalid. Just returns if the object is invalid already.

Parámetros

location - el índice del arreglo que identifica el objeto que se va a eliminar.

Throws

IndexOutOfBoundsException - if location < 0 || location >= size() .
java.lang.IllegalStateException - if the Realm is closed or the method is called from the wrong thread.

Anulaciones

deleteFromRealm en la clase OrderedRealmCollectionImpl

deleteLastFromRealm

public boolean deleteLastFromRealm ()
Deletes the last object from the Realm. The last object will become invalid. Devuelve `true` if an object was deleted, `false` otherwise. Throws java.lang.IllegalStateException - if the Realm is closed or the method is called from the wrong thread. Anulaciones `deleteLastFromRealm` en la clase OrderedRealmCollectionImpl

freeze

public OrderedRealmCollection freeze ()

isFrozen

public boolean isFrozen ()

isLoaded

public boolean isLoaded ()
Checks if a collection has finished loading its data yet. Devuelve `true` if data has been loaded and is available, `false` if data is still being loaded.

cargar

public boolean load ()
Blocks the collection until all data are available. Devuelve `true` si los datos se pudieran cargar correctamente, `false` de lo contrario.

Tamaño

public int size ()
Devuelve el número de elementos en este resultado de consulta. Devuelve the number of elements in this query result. Anulaciones `size` en la clase OrderedRealmCollectionImpl

sort

public RealmResults sort ( java.lang.String[] fieldNames, io.realm.Sort[] sortOrders )
Not supported by OrderedRealmCollectionSnapshot . Use 'sort()' on the original OrderedRealmCollection instead. Devuelve se creará y devolverá un nuevo RealmResults ordenado. La colección original permanece sin cambios. Throws UnsupportedOperationException - Anulaciones `sort` en la clase OrderedRealmCollectionImpl

public RealmResults sort ( String fieldName1, Sort sortOrder1, String fieldName2, Sort sortOrder2 )
Not supported by OrderedRealmCollectionSnapshot . Use 'sort()' on the original OrderedRealmCollection instead. Devuelve se creará y devolverá un nuevo RealmResults ordenado. La colección original permanece sin cambios. Throws UnsupportedOperationException - Anulaciones `sort` en la clase OrderedRealmCollectionImpl

public RealmResults sort ( String fieldName, Sort sortOrder )
Not supported by OrderedRealmCollectionSnapshot . Use 'sort()' on the original OrderedRealmCollection instead. Devuelve se creará y devolverá un nuevo RealmResults ordenado. La colección original permanece sin cambios. Throws UnsupportedOperationException - Anulaciones `sort` en la clase OrderedRealmCollectionImpl

public RealmResults sort ( String fieldName )
Not supported by OrderedRealmCollectionSnapshot . Use 'sort()' on the original OrderedRealmCollection instead. Devuelve se creará y devolverá un nuevo RealmResults ordenado. La colección original permanece sin cambios. Throws UnsupportedOperationException - Anulaciones `sort` en la clase OrderedRealmCollectionImpl

dónde

public RealmQuery where ()
Not supported by OrderedRealmCollectionSnapshot . Use 'where()' on the original OrderedRealmCollection instead. Devuelve un objeto de RealmQuery. Throws UnsupportedOperationException -

Volver

OrderedRealmCollectionChangeListener

ProxyState