QuerySnapshot

public class QuerySnapshot extends Object
implements Iterable<QueryDocumentSnapshot>

A QuerySnapshot contains the results of a query. It can contain zero or more DocumentSnapshot objects.

Subclassing Note: Cloud Firestore classes are not meant to be subclassed except for use in test mocks. Subclassing is not supported in production code and new SDK releases may break code that does so.

Public Method Summary

boolean	equals(Object obj)
List<DocumentChange>	getDocumentChanges() Returns the list of documents that changed since the last snapshot.
List<DocumentChange>	getDocumentChanges(MetadataChanges metadataChanges) Returns the list of documents that changed since the last snapshot.
List<DocumentSnapshot>	getDocuments() Returns the documents in this `QuerySnapshot` as a List in order of the query.
SnapshotMetadata	getMetadata()
Query	getQuery()
int	hashCode()
boolean	isEmpty() Returns true if there are no documents in the `QuerySnapshot`.
Iterator<QueryDocumentSnapshot>	iterator()
int	size() Returns the number of documents in the `QuerySnapshot`.
<T> List<T>	toObjects(Class<T> clazz, DocumentSnapshot.ServerTimestampBehavior serverTimestampBehavior) Returns the contents of the documents in the `QuerySnapshot`, converted to the provided class, as a list.
<T> List<T>	toObjects(Class<T> clazz) Returns the contents of the documents in the `QuerySnapshot`, converted to the provided class, as a list.

Inherited Method Summary

From class java.lang.Object

Object	clone()
boolean	equals(Object arg0)
void	finalize()
final Class<?>	getClass()
int	hashCode()
final void	notify()
final void	notifyAll()
String	toString()
final void	wait(long arg0, int arg1)
final void	wait(long arg0)
final void	wait()

From interface java.lang.Iterable

void	forEach(Consumer<? super T> arg0)
abstract Iterator<QueryDocumentSnapshot>	iterator()
Spliterator<QueryDocumentSnapshot>	spliterator()

Public Methods

public boolean equals (Object obj)

public List<DocumentChange> getDocumentChanges ()

Returns the list of documents that changed since the last snapshot. If it's the first snapshot all documents will be in the list as added changes.

Documents with changes only to their metadata will not be included.

Returns

The list of document changes since the last snapshot.

public List<DocumentChange> getDocumentChanges (MetadataChanges metadataChanges)

Returns the list of documents that changed since the last snapshot. If it's the first snapshot all documents will be in the list as added changes.

Parameters

metadataChanges	Indicates whether metadata-only changes (i.e. only `DocumentSnapshot.getMetadata()` changed) should be included.

Returns

The list of document changes since the last snapshot.

public List<DocumentSnapshot> getDocuments ()

Returns the documents in this QuerySnapshot as a List in order of the query.

Returns

The list of documents.

public SnapshotMetadata getMetadata ()

Returns

The metadata for this query snapshot.

public Query getQuery ()

public int hashCode ()

public boolean isEmpty ()

Returns true if there are no documents in the QuerySnapshot.

public Iterator<QueryDocumentSnapshot> iterator ()

public int size ()

Returns the number of documents in the QuerySnapshot.

public List<T> toObjects (Class<T> clazz, DocumentSnapshot.ServerTimestampBehavior serverTimestampBehavior)

Returns the contents of the documents in the QuerySnapshot, converted to the provided class, as a list.

Parameters

clazz	The POJO type used to convert the documents in the list.
serverTimestampBehavior	Configures the behavior for server timestamps that have not yet been set to their final value.

public List<T> toObjects (Class<T> clazz)

Returns the contents of the documents in the QuerySnapshot, converted to the provided class, as a list.

Parameters

clazz	The POJO type used to convert the documents in the list.