blob: dda108bc6957ad828d08acccd760cb0ae1d5bcac (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.revwalk;
abstract class AbstractRevQueue extends Generator {
static final AbstractRevQueue EMPTY_QUEUE = new AlwaysEmptyQueue();
/** Current output flags set for this generator instance. */
int outputType;
AbstractRevQueue(boolean firstParent) {
super(firstParent);
}
/**
* Add a commit to the queue.
* <p>
* This method always adds the commit, even if it is already in the queue or
* previously was in the queue but has already been removed. To control
* queue admission use {@link #add(RevCommit, RevFlag)}.
*
* @param c
* commit to add.
*/
public abstract void add(RevCommit c);
/**
* Add a commit if it does not have a flag set yet, then set the flag.
* <p>
* This method permits the application to test if the commit has the given
* flag; if it does not already have the flag than the commit is added to
* the queue and the flag is set. This later will prevent the commit from
* being added twice.
*
* @param c
* commit to add.
* @param queueControl
* flag that controls admission to the queue.
*/
public final void add(RevCommit c, RevFlag queueControl) {
if (!c.has(queueControl)) {
c.add(queueControl);
add(c);
}
}
/**
* Add a commit's parents if one does not have a flag set yet.
* <p>
* This method permits the application to test if the commit has the given
* flag; if it does not already have the flag than the commit is added to
* the queue and the flag is set. This later will prevent the commit from
* being added twice.
*
* @param c
* commit whose parents should be added.
* @param queueControl
* flag that controls admission to the queue.
*/
public final void addParents(RevCommit c, RevFlag queueControl) {
final RevCommit[] pList = c.getParents();
if (pList == null) {
return;
}
for (int i = 0; i < pList.length; i++) {
if (firstParent && i > 0) {
break;
}
add(pList[i], queueControl);
}
}
/**
* {@inheritDoc}
* <p>
* Remove the first commit from the queue.
*/
@Override
public abstract RevCommit next();
/**
* Remove all entries from this queue.
*/
public abstract void clear();
abstract boolean everbodyHasFlag(int f);
abstract boolean anybodyHasFlag(int f);
@Override
int outputType() {
return outputType;
}
/**
* Describe this queue
*
* @param s
* a StringBuilder
* @param c
* a {@link org.eclipse.jgit.revwalk.RevCommit}
*/
protected static void describe(StringBuilder s, RevCommit c) {
s.append(c.toString());
s.append('\n');
}
private static class AlwaysEmptyQueue extends AbstractRevQueue {
private AlwaysEmptyQueue() {
super(false);
}
@Override
public void add(RevCommit c) {
throw new UnsupportedOperationException();
}
@Override
public RevCommit next() {
return null;
}
@Override
boolean anybodyHasFlag(int f) {
return false;
}
@Override
boolean everbodyHasFlag(int f) {
return true;
}
@Override
public void clear() {
// Nothing to clear, we have no state.
}
}
}
|
