PagingDataFutures

public final class PagingDataFutures


Summary

Public methods

static final @NonNull PagingData<@NonNull T>
<T extends Object> PagingDataFutures.filter(
    @NonNull PagingData<@NonNull T> receiver,
    @NonNull AsyncFunction<@NonNull T, @NonNull Boolean> predicate,
    @NonNull Executor executor
)

Returns a PagingData containing only elements matching the given predicate.

static final @NonNull PagingData<@NonNull R>
<T extends Object, R extends Object> PagingDataFutures.flatMap(
    @NonNull PagingData<@NonNull T> receiver,
    @NonNull AsyncFunction<@NonNull T, @NonNull Iterable<@NonNull R>> transform,
    @NonNull Executor executor
)

Returns a PagingData of all elements returned from applying the given transform to each element, as it is loaded.

static final @NonNull PagingData<@NonNull R>
<T extends R, R extends Object> PagingDataFutures.insertSeparators(
    @NonNull PagingData<@NonNull T> receiver,
    @NonNull AsyncFunction<@NonNull AdjacentItems<@NonNull T>, @NonNull R> generator,
    @NonNull Executor executor
)

Returns a PagingData containing each original element, with an optional separator generated by generator, given the elements before and after (or null, in boundary conditions).

static final @NonNull PagingData<@NonNull R>
<T extends Object, R extends Object> PagingDataFutures.map(
    @NonNull PagingData<@NonNull T> receiver,
    @NonNull AsyncFunction<@NonNull T, @NonNull R> transform,
    @NonNull Executor executor
)

Returns a PagingData containing the result of applying the given transform to each element, as it is loaded.

Public methods

PagingDataFutures.filter

@NonNull
public static final PagingData<@NonNull T> <T extends Object> PagingDataFutures.filter(
    @NonNull PagingData<@NonNull T> receiver,
    @NonNull AsyncFunction<@NonNull T, @NonNull Boolean> predicate,
    @NonNull Executor executor
)

Returns a PagingData containing only elements matching the given predicate.

Parameters
@NonNull AsyncFunction<@NonNull T, @NonNull Boolean> predicate

AsyncFunction returning false for unmatched items which should be filtered.

@NonNull Executor executor

Executor to run the AsyncFunction in.

PagingDataFutures.flatMap

@NonNull
public static final PagingData<@NonNull R> <T extends Object, R extends Object> PagingDataFutures.flatMap(
    @NonNull PagingData<@NonNull T> receiver,
    @NonNull AsyncFunction<@NonNull T, @NonNull Iterable<@NonNull R>> transform,
    @NonNull Executor executor
)

Returns a PagingData of all elements returned from applying the given transform to each element, as it is loaded.

Parameters
@NonNull AsyncFunction<@NonNull T, @NonNull Iterable<@NonNull R>> transform

AsyncFunction to transform an item of type T a list of items of type R.

@NonNull Executor executor