FinderWithIdSupport.java
- /*
- * *********************************************************************************************************************
- *
- * TheseFoolishThings: Miscellaneous utilities
- * http://tidalwave.it/projects/thesefoolishthings
- *
- * Copyright (C) 2009 - 2023 by Tidalwave s.a.s. (http://tidalwave.it)
- *
- * *********************************************************************************************************************
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
- * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- *
- * *********************************************************************************************************************
- *
- * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
- * git clone https://github.com/tidalwave-it/thesefoolishthings-src
- *
- * *********************************************************************************************************************
- */
- package it.tidalwave.util.spi;
- import javax.annotation.Nonnull;
- import java.util.Collections;
- import java.util.List;
- import java.util.Optional;
- import java.util.stream.Stream;
- import it.tidalwave.util.Finder;
- import it.tidalwave.util.Id;
- import static java.util.Collections.*;
- import lombok.RequiredArgsConstructor;
- /***********************************************************************************************************************
- *
- * A support class for implementing a {@link Finder} that provides filtering by id.
- *
- * @param <T> the product abstract type
- * @param <I> the product concrete type
- * @param <F> the {@code Finder} type
- * @since 3.2-ALPHA-15
- *
- * @author Fabrizio Giudici
- * @it.tidalwave.javadoc.experimental
- *
- **********************************************************************************************************************/
- @RequiredArgsConstructor
- public class FinderWithIdSupport<T, I extends T, F extends ExtendedFinderSupport<T, F>>
- extends HierarchicFinderSupport<T, F> implements FinderWithId<T, F>
- {
- private static final long serialVersionUID = 2L;
- @Nonnull
- /* package */ final Optional<Id> id;
- public FinderWithIdSupport()
- {
- id = Optional.empty();
- }
- public FinderWithIdSupport (@Nonnull final FinderWithIdSupport<T, I, F> other, @Nonnull final Object override)
- {
- super(other, override);
- final FinderWithIdSupport<T, I, F> source = getSource(FinderWithIdSupport.class, other, override);
- this.id = source.id;
- }
- @Override @Nonnull
- public F withId (@Nonnull final Id id)
- {
- return clonedWith(new FinderWithIdSupport<>(Optional.of(id)));
- }
- @Override @Nonnull
- protected List<T> computeResults()
- {
- return id.map(id -> findById(id).map(Collections::singletonList).orElse(emptyList())).orElse(findAll());
- }
- @Nonnull
- protected Optional<T> findById (@Nonnull final Id id)
- {
- throw new UnsupportedOperationException("Must be overridden");
- }
- @Nonnull
- protected List<T> findAll()
- {
- throw new UnsupportedOperationException("Must be overridden");
- }
- @Nonnull
- protected Stream<I> streamImpl()
- {
- return (Stream<I>)stream();
- }
- }