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com.vaadin.data.provider.
Interface BackEndDataProvider<T,F>
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Type Parameters:
T- data provider data typeF- data provider filter typeAll Superinterfaces:
DataProvider<T,F>,SerializableAll Known Subinterfaces:
All Known Implementing Classes:
AbstractBackEndDataProvider,AbstractBackEndHierarchicalDataProvider,CallbackDataProviderpublic interface BackEndDataProvider<T,F> extends DataProvider<T,F>A data provider that lazy loads items from a back end.
Since:
8.0
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Method Summary
All Methods Modifier and Type Method Description default booleanisInMemory()Gets whether the DataProvider content all available in memory or does it use some external backend.
default voidsetSortOrder(QuerySortOrder sortOrder)Sets a single sort order to use as the default sorting for this data provider.
default voidsetSortOrders(QuerySortOrderBuilder builder)Sets the sort order to use, given a
QuerySortOrderBuilder.voidsetSortOrders(List<QuerySortOrder> sortOrders)Sets a list of sort orders to use as the default sorting for this data provider.
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Methods inherited from interface com.vaadin.data.provider.DataProvider
addDataProviderListener, fetch, getId, refreshAll, refreshItem, size, withConfigurableFilter, withConfigurableFilter, withConvertedFilter
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Method Detail
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setSortOrders
void setSortOrders(List<QuerySortOrder> sortOrders)Sets a list of sort orders to use as the default sorting for this data provider. This overrides the sorting set by any other method that manipulates the default sorting of this data provider.
The default sorting is used if the query defines no sorting. The default sorting is also used to determine the ordering of items that are considered equal by the sorting defined in the query.
Parameters:
sortOrders- a list of sort orders to set, notnullSee Also:
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setSortOrders
default void setSortOrders(QuerySortOrderBuilder builder)Sets the sort order to use, given a
QuerySortOrderBuilder. Shorthand forsetSortOrders(builder.build()).Parameters:
builder- the sort builder to retrieve the sort order fromThrows:
NullPointerException- if builder is nullSee Also:
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setSortOrder
default void setSortOrder(QuerySortOrder sortOrder)Sets a single sort order to use as the default sorting for this data provider. This overrides the sorting set by any other method that manipulates the default sorting of this data provider.
The default sorting is used if the query defines no sorting. The default sorting is also used to determine the ordering of items that are considered equal by the sorting defined in the query.
Parameters:
sortOrder- a sort order to set, ornullto clear any previously set sort ordersSee Also:
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isInMemory
default boolean isInMemory()Description copied from interface:
DataProviderGets whether the DataProvider content all available in memory or does it use some external backend.
Specified by:
isInMemoryin interfaceDataProvider<T,F>Returns:
trueif all data is in memory;falseif not
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