Package com.vaadin.flow.data.provider

Class FilterUtils

java.lang.Object

com.vaadin.flow.data.provider.FilterUtils

public final class FilterUtils
extends Object

Internal filter related utilities for data provider.

Since:

1.3

Author:

Vaadin Ltd

Method Summary

Modifier and Type	Method	Description
static <F,Q,C> F	combineFilters(SerializableBiFunction<Q,C,F> filterCombiner, Q queryFilter, C configuredFilter)	Combines the configured filter and the filter from the query into one filter instance that can be passed to the wrapped data provider using the filterCombiner.
static <T,C,F> F	convertFilter(SerializableFunction<C,F> filterConverter, Query<T,C> query)	Gets the filter converted from a query filter by the filterConverter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

combineFilters

public static <F,Q,C> F combineFilters(SerializableBiFunction<Q,C,F> filterCombiner,
                                                   Q queryFilter,
                                                   C configuredFilter)

Combines the configured filter and the filter from the query into one filter instance that can be passed to the wrapped data provider using the filterCombiner.

Type Parameters:

F - the filter type of the wrapped data provider

Q - the query filter type

C - the configurable filter type

Parameters:

filterCombiner - a filters combiner

queryFilter - a query filter

configuredFilter - a configured filter

Returns:

a filters combination

convertFilter

public static <T,C,F> F convertFilter(SerializableFunction<C,F> filterConverter,
                                                  Query<T,C> query)

Gets the filter converted from a query filter by the filterConverter.

Type Parameters:

T - data type

C - the filter type that the wrapped data provider accepts; typically provided by a Component

F - the filter type of data provider

Parameters:

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. Not null

query - a query with a filter to convert

Returns:

a converted filter, may be null if the query has no filter