Method: lambda$computeResults$0(Id)

1: /*
2: * *********************************************************************************************************************
3: *
4: * TheseFoolishThings: Miscellaneous utilities
5: * http://tidalwave.it/projects/thesefoolishthings
6: *
7: * Copyright (C) 2009 - 2024 by Tidalwave s.a.s. (http://tidalwave.it)
8: *
9: * *********************************************************************************************************************
10: *
11: * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
12: * the License. You may obtain a copy of the License at
13: *
14: * http://www.apache.org/licenses/LICENSE-2.0
15: *
16: * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
17: * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
18: * specific language governing permissions and limitations under the License.
19: *
20: * *********************************************************************************************************************
21: *
22: * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
23: * git clone https://github.com/tidalwave-it/thesefoolishthings-src
24: *
25: * *********************************************************************************************************************
26: */
27: package it.tidalwave.util.spi;
28:
29: import javax.annotation.Nonnull;
30: import java.util.Collections;
31: import java.util.List;
32: import java.util.Optional;
33: import java.util.stream.Stream;
34: import it.tidalwave.util.Finder;
35: import it.tidalwave.util.Id;
36: import lombok.RequiredArgsConstructor;
37: import static java.util.Collections.emptyList;
38:
39: /***********************************************************************************************************************
40: *
41: * A support class for implementing a {@link Finder} that provides filtering by id.
42: *
43: * @param <T> the product abstract type
44: * @param <I> the product concrete type
45: * @param <F> the {@code Finder} type
46: * @since 3.2-ALPHA-15
47: *
48: * @author Fabrizio Giudici
49: * @it.tidalwave.javadoc.experimental
50: *
51: **********************************************************************************************************************/
52: @RequiredArgsConstructor
53: public class FinderWithIdSupport<T, I extends T, F extends ExtendedFinderSupport<T, F>>
54: extends HierarchicFinderSupport<T, F> implements FinderWithId<T, F>
55: {
56: private static final long serialVersionUID = 2L;
57:
58: @Nonnull
59: /* package */ final Optional<Id> id;
60:
61: public FinderWithIdSupport()
62: {
63: id = Optional.empty();
64: }
65:
66: public FinderWithIdSupport (@Nonnull final FinderWithIdSupport<T, I, F> other, @Nonnull final Object override)
67: {
68: super(other, override);
69: final FinderWithIdSupport<T, I, F> source = getSource(FinderWithIdSupport.class, other, override);
70: this.id = source.id;
71: }
72:
73: @Override @Nonnull
74: public F withId (@Nonnull final Id id)
75: {
76: return clonedWith(new FinderWithIdSupport<>(Optional.of(id)));
77: }
78:
79: @Override @Nonnull
80: protected List<T> computeResults()
81: {
82: return id.map(id -> findById(id).map(Collections::singletonList).orElse(emptyList())).orElse(findAll());
83: }
84:
85: @Nonnull
86: protected Optional<T> findById (@Nonnull final Id id)
87: {
88: throw new UnsupportedOperationException("Must be overridden");
89: }
90:
91: @Nonnull
92: protected List<T> findAll()
93: {
94: throw new UnsupportedOperationException("Must be overridden");
95: }
96:
97: @Nonnull
98: protected Stream<I> streamImpl()
99: {
100: return (Stream<I>)stream();
101: }
102: }
103: