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com.vaadin.flow.data.provider.hierarchy.
Class AbstractHierarchicalDataProvider<T,F>
java.lang.Object
com.vaadin.flow.data.provider.AbstractDataProvider<T,F>
com.vaadin.flow.data.provider.hierarchy.AbstractHierarchicalDataProvider<T,F>
Type Parameters:
T - data type
F - filter type
All Implemented Interfaces:
DataProvider<T,, HierarchicalDataProvider<T,, Serializable
Direct Known Subclasses:
public abstract class AbstractHierarchicalDataProvider<T,F>
extends AbstractDataProvider<T,F>
implements HierarchicalDataProvider<T,F>
Abstract hierarchical data provider implementation which takes care of item refreshes and associated events.
Since:
1.2
Author:
Vaadin Ltd
See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionWraps this data provider to create a data provider that supports programmatically setting a filter but no filtering through the query.
<Q,C> HierarchicalConfigurableFilterDataProvider<T, Q, C> withConfigurableFilter(SerializableBiFunction<Q, C, F> filterCombiner) Wraps this data provider to create a data provider that supports programmatically setting a filter that will be combined with a filter provided through the query.
<C> HierarchicalDataProvider<T,C> withConvertedFilter(SerializableFunction<C, F> filterConverter) Wraps this data provider to create a data provider that uses a different filter type.
Methods inherited from class com.vaadin.flow.data.provider.AbstractDataProvider
addDataProviderListener, addListener, fireEvent, refreshAll, refreshItem, refreshItemMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface com.vaadin.flow.data.provider.DataProvider
addDataProviderListener, getId, isInMemory, refreshAll, refreshItem, refreshItemMethods inherited from interface com.vaadin.flow.data.provider.hierarchy.HierarchicalDataProvider
fetch, fetchChildren, getChildCount, hasChildren, size
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Constructor Details
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AbstractHierarchicalDataProvider
public AbstractHierarchicalDataProvider()
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Method Details
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withConfigurableFilter
public <Q,C> HierarchicalConfigurableFilterDataProvider<T,Q, withConfigurableFilterC> (SerializableBiFunction<Q, C, F> filterCombiner) Description copied from interface:
DataProviderWraps this data provider to create a data provider that supports programmatically setting a filter that will be combined with a filter provided through the query.
Specified by:
withConfigurableFilterin interfaceDataProvider<T,F> Specified by:
withConfigurableFilterin interfaceHierarchicalDataProvider<T,F> Type Parameters:
Q- the query filter typeC- the configurable filter typeParameters:
filterCombiner- a callback for combining and the configured filter with the filter from the query to get a filter to pass to the wrapped provider. Either parameter might benull, but the callback will not be invoked at all if both would benull. Notnull.Returns:
a data provider with a configurable filter, not
nullSee Also:
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withConvertedFilter
public <C> HierarchicalDataProvider<T,C> withConvertedFilter(SerializableFunction<C, F> filterConverter) Description copied from interface:
DataProviderWraps this data provider to create a data provider that uses a different filter type. This can be used for adapting this data provider to a filter type provided by a Component such as ComboBox.
For example receiving a String from ComboBox and making a Predicate based on it:
DataProvider<Person, Predicate<Person>> dataProvider; // ComboBox uses String as the filter type DataProvider<Person, String> wrappedProvider = dataProvider .withConvertedFilter(filterText -> { Predicate<Person> predicate = person -> person.getName() .startsWith(filterText); return predicate; }); comboBox.setDataProvider(wrappedProvider);Specified by:
withConvertedFilterin interfaceDataProvider<T,F> Specified by:
withConvertedFilterin interfaceHierarchicalDataProvider<T,F> Type Parameters:
C- the filter type that the wrapped data provider accepts; typically provided by a ComponentParameters:
filterConverter- callback that converts the filter in the query of the wrapped data provider into a filter supported by this data provider. Will only be called if the query contains a filter. NotnullReturns:
wrapped data provider, not
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withConfigurableFilter
Description copied from interface:
DataProviderWraps this data provider to create a data provider that supports programmatically setting a filter but no filtering through the query.
Specified by:
withConfigurableFilterin interfaceDataProvider<T,F> Specified by:
withConfigurableFilterin interfaceHierarchicalDataProvider<T,F> Returns:
a data provider with a configurable filter, not
nullSee Also:
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