Package: ProviderFinder
ProviderFinder
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ProviderFinder(BiFunction) |
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ProviderFinder(ProviderFinder, Object) |
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computeNeededResults() |
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Coverage
1: /*
2: * *************************************************************************************************************************************************************
3: *
4: * TheseFoolishThings: Miscellaneous utilities
5: * http://tidalwave.it/projects/thesefoolishthings
6: *
7: * Copyright (C) 2009 - 2025 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 the License.
12: * 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 an "AS IS" BASIS, WITHOUT WARRANTIES OR
17: * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
18: *
19: * *************************************************************************************************************************************************************
20: *
21: * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
22: * git clone https://github.com/tidalwave-it/thesefoolishthings-src
23: *
24: * *************************************************************************************************************************************************************
25: */
26: package it.tidalwave.util.impl.finder;
27:
28: // import javax.annotation.concurrent.Immutable;
29: import jakarta.annotation.Nonnull;
30: import java.util.Collection;
31: import java.util.List;
32: import java.util.concurrent.CopyOnWriteArrayList;
33: import java.util.function.BiFunction;
34: import it.tidalwave.util.spi.SimpleFinderSupport;
35:
36: /***************************************************************************************************************************************************************
37: *
38: * A {@link it.tidalwave.util.Finder} which retrieves results from a provider. Don't use directly; use
39: * {@link it.tidalwave.util.Finder#ofProvider(BiFunction)} (Finder, Function)} instead.
40: *
41: * @author Fabrizio Giudici
42: *
43: **************************************************************************************************************************************************************/
44: /* @Immutable */
45: public class ProviderFinder<T> extends SimpleFinderSupport<T>
46: {
47: private static final long serialVersionUID = 1344191036948400804L;
48:
49: @Nonnull
50: private final BiFunction<Integer, Integer, ? extends Collection<? extends T>> supplier;
51:
52: /***********************************************************************************************************************************************************
53: * Creates a new instance given a supplier.
54: * @param supplier the supplier
55: **********************************************************************************************************************************************************/
56: @SuppressWarnings("BoundedWildcard")
57: public ProviderFinder (@Nonnull final BiFunction<Integer, Integer, ? extends Collection<? extends T>> supplier)
58: {
59: this.supplier = supplier;
60: }
61:
62: /***********************************************************************************************************************************************************
63: * The special Finder copy constructor.
64: * @param other the finder to copy
65: * @param override the overriding object
66: **********************************************************************************************************************************************************/
67: @SuppressWarnings("unchecked")
68: public ProviderFinder (@Nonnull final ProviderFinder<T> other, @Nonnull final Object override)
69: {
70: super(other, override);
71: final var source = getSource(ProviderFinder.class, other, override);
72: this.supplier = source.supplier;
73: }
74:
75: /***********************************************************************************************************************************************************
76: * {@inheritDoc}
77: **********************************************************************************************************************************************************/
78: @Override @Nonnull
79: protected List<T> computeNeededResults()
80: {
81: return new CopyOnWriteArrayList<>(supplier.apply(firstResult, maxResults));
82: }
83: }