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
|
/*
* SonarQube
* Copyright (C) 2009-2024 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.db;
import java.util.Objects;
import static com.google.common.base.Preconditions.checkArgument;
public class OffsetBasedPagination implements Pagineable {
private final int offset;
private final int pageSize;
private OffsetBasedPagination(int offset, int pageSize) {
this.offset = offset;
this.pageSize = pageSize;
}
/**
* @param offset as meant by database sql offset: how many rows will be skipped before selecting the first result. offset=0 means no element would be skipped
* @param pageSize how many rows should be returned
* @return
*/
public static OffsetBasedPagination forOffset(int offset, int pageSize) {
checkArgument(offset >= 0, "offset must be >= 0");
checkArgument(pageSize >= 1, "page size must be >= 1");
return new OffsetBasedPagination(offset, pageSize);
}
/**
* @param startRowNumber index of the first element to be returned. startRowNumber = 1 means no element would be skipped
* @param pageSize how many rows should be returned
* @return
*/
public static OffsetBasedPagination forStartRowNumber(int startRowNumber, int pageSize) {
checkArgument(startRowNumber >= 1, "startRowNumber must be >= 1");
checkArgument(pageSize >= 1, "page size must be >= 1");
return new OffsetBasedPagination(startRowNumber - 1, pageSize);
}
@Override
public int getOffset() {
return offset;
}
@Override
public int getPageSize() {
return pageSize;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
OffsetBasedPagination that = (OffsetBasedPagination) o;
return offset == that.offset && pageSize == that.pageSize;
}
@Override
public int hashCode() {
return Objects.hash(offset, pageSize);
}
}
|
