1 /*
2 * The MIT License (MIT)
3 *
4 * Copyright (c) 2013-2026 The Coveralls Maven Plugin Project Contributors:
5 * https://github.com/hazendaz/coveralls-maven-plugin/graphs/contributors
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25 package org.eluder.coveralls.maven.plugin.source;
26
27 import java.io.IOException;
28 import java.util.LinkedHashMap;
29 import java.util.Map;
30
31 import org.eluder.coveralls.maven.plugin.ProcessingException;
32 import org.eluder.coveralls.maven.plugin.domain.Source;
33
34 /**
35 * Source callback that tracks passed by source files and provides only unique source files to the delegate. Note that
36 * the implementation is not thread safe so the {@link #onSource(org.eluder.coveralls.maven.plugin.domain.Source)} can
37 * be called only from single thread concurrently.
38 */
39 public class UniqueSourceCallback implements SourceCallback {
40
41 /** The cache. */
42 private final Map<Source, Source> cache;
43
44 /** The delegate. */
45 private final SourceCallback delegate;
46
47 /**
48 * Instantiates a new unique source callback.
49 *
50 * @param delegate
51 * the delegate
52 */
53 public UniqueSourceCallback(final SourceCallback delegate) {
54 this.cache = new LinkedHashMap<>();
55 this.delegate = delegate;
56 }
57
58 @Override
59 public void onBegin() throws ProcessingException, IOException {
60 this.delegate.onBegin();
61 }
62
63 @Override
64 public void onSource(final Source source) throws ProcessingException, IOException {
65 final var merged = source.merge(this.cache.get(source));
66 this.cache.put(merged, merged);
67 }
68
69 @Override
70 public void onComplete() throws ProcessingException, IOException {
71 for (final Source source : this.cache.values()) {
72 this.delegate.onSource(source);
73 }
74 this.delegate.onComplete();
75 }
76 }