1 | /*- | |
2 | * #%L | |
3 | * io.earcam.instrumental.io | |
4 | * %% | |
5 | * Copyright (C) 2018 earcam | |
6 | * %% | |
7 | * SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT) | |
8 | * | |
9 | * You <b>must</b> choose to accept, in full - any individual or combination of | |
10 | * the following licenses: | |
11 | * <ul> | |
12 | * <li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li> | |
13 | * <li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li> | |
14 | * <li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li> | |
15 | * <li><a href="https://opensource.org/licenses/MIT">MIT</a></li> | |
16 | * </ul> | |
17 | * #L% | |
18 | */ | |
19 | package io.earcam.utilitarian.io; | |
20 | ||
21 | import java.nio.file.DirectoryStream; | |
22 | import java.nio.file.Files; | |
23 | import java.nio.file.Path; | |
24 | import java.util.ArrayDeque; | |
25 | import java.util.Deque; | |
26 | import java.util.Iterator; | |
27 | import java.util.function.Function; | |
28 | ||
29 | import io.earcam.unexceptional.Exceptional; | |
30 | ||
31 | class RecursivePathIterator implements Iterator<Path> { | |
32 | ||
33 | private static final Function<Path, DirectoryStream<Path>> DEFAULT_STREAMER = Exceptional.uncheckFunction(Files::newDirectoryStream); | |
34 | private final Deque<Iterator<Path>> pending = new ArrayDeque<>(); | |
35 | private final Function<Path, DirectoryStream<Path>> streamer; | |
36 | private Iterator<Path> current; | |
37 | ||
38 | ||
39 | RecursivePathIterator(Path root) | |
40 | { | |
41 | this(root, DEFAULT_STREAMER); | |
42 | } | |
43 | ||
44 | ||
45 | RecursivePathIterator(Path root, Function<Path, DirectoryStream<Path>> directoryStreamer) | |
46 | { | |
47 | this(directoryStreamer.apply(root).iterator(), directoryStreamer); | |
48 | } | |
49 | ||
50 | ||
51 | RecursivePathIterator(Iterator<Path> iterator, Function<Path, DirectoryStream<Path>> directoryStreamer) | |
52 | { | |
53 | this.current = iterator; | |
54 | this.streamer = directoryStreamer; | |
55 | } | |
56 | ||
57 | ||
58 | @Override | |
59 | public boolean hasNext() | |
60 | { | |
61 |
2
1. hasNext : negated conditional → KILLED 2. hasNext : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED |
return current.hasNext() |
62 |
1
1. hasNext : negated conditional → KILLED |
|| popPending(); |
63 | } | |
64 | ||
65 | ||
66 | private boolean popPending() | |
67 | { | |
68 |
1
1. popPending : negated conditional → KILLED |
if(pending.isEmpty()) { |
69 |
1
1. popPending : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED |
return false; |
70 | } | |
71 | current = pending.pop(); | |
72 |
1
1. popPending : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED |
return hasNext(); |
73 | } | |
74 | ||
75 | ||
76 | @Override | |
77 | public Path next() | |
78 | { | |
79 | Path next = current.next(); | |
80 |
1
1. next : negated conditional → KILLED |
if(next.toFile().isDirectory()) { |
81 |
1
1. next : removed call to java/util/Deque::push → KILLED |
pending.push(current); |
82 | current = streamer.apply(next).iterator(); | |
83 | } | |
84 |
1
1. next : mutated return of Object value for io/earcam/utilitarian/io/RecursivePathIterator::next to ( if (x != null) null else throw new RuntimeException ) → KILLED |
return next; |
85 | } | |
86 | ||
87 | } | |
Mutations | ||
61 |
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62 |
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69 |
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84 |
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