java.lang.Object | ||
↳ | com.google.android.gms.drive.metadata.MetadataField<T> | |
↳ | com.google.android.gms.drive.metadata.CollectionMetadataField<T> |
A metadata field which holds a collection of values. Instances of this class (such as the static
values in SearchableField
) can be used to create
"in" filters for file queries.
For example, the following code will find all files in the folder with ID "folder" with the MIME type "text/plain":
DriveId parent = DriveId.createFromResourceId("folder"); Filter parentFilter = Filters.in(SearchableField.PARENTS, parent); Filter mimeTypeFilter = Filters.eq(SearchableField.MIME_TYPE, "text/plain"); Query query = new Query.Builder().addFilters(parentFilter, mimeTypeFilter).build(); for (Metadata metadata : Drive.DriveApi.query(apiClient, query).await().getMetadataBuffer()) { System.out.println(metadata.getTitle()); }
Note that you must pass a CollectionMetadataField
to the Filters.in
method;
a plain MetadataField
cannot be used as part of an "in" query. However, every
CollectionMetadataField
is also a MetadataField
, so you can use a
CollectionMetadataField
with Filters.eq
(for example, if you want to find a
file with an exact set of parents).
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