blob: 75c11499607c47478b256bb598665eebe86e98e7 (
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
|
package de.lmu.ifi.dbs.elki.index;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import de.lmu.ifi.dbs.elki.persistent.ExternalizablePage;
import de.lmu.ifi.dbs.elki.persistent.MemoryPageFileFactory;
import de.lmu.ifi.dbs.elki.persistent.PageFile;
import de.lmu.ifi.dbs.elki.persistent.PageFileFactory;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizer;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.OptionID;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.Parameterization;
import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.ObjectParameter;
/**
* Abstract base class for tree-based indexes.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory,interface
* @apiviz.excludeSubtypes
* @apiviz.composedOf PageFileFactory
*
* @param <O> Object type
* @param <I> Index type
*/
public abstract class PagedIndexFactory<O, I extends Index> implements IndexFactory<O, I> {
/**
* Page file factory.
*/
private PageFileFactory<?> pageFileFactory;
/**
* Constructor.
*
* @param pageFileFactory Page file factory
*/
public PagedIndexFactory(PageFileFactory<?> pageFileFactory) {
super();
this.pageFileFactory = pageFileFactory;
}
/**
* Make the page file for this index.
*
* @param <N> page type
* @param cls Class information
* @return Page file
*/
protected <N extends ExternalizablePage> PageFile<N> makePageFile(Class<N> cls) {
@SuppressWarnings("unchecked")
final PageFileFactory<N> castFactory = (PageFileFactory<N>) pageFileFactory;
return castFactory.newPageFile(cls);
}
/**
* Parameterization class.
*
* @author Erich Schubert
*
* @apiviz.exclude
*/
public abstract static class Parameterizer<O> extends AbstractParameterizer {
/**
* Optional parameter that specifies the factory type of pagefile to use for
* the index.
* <p>
* Key: {@code -index.pagefile}
* </p>
*/
public static final OptionID PAGEFILE_ID = new OptionID("index.pagefile", "The pagefile factory for storing the index.");
/**
* Page file factory.
*/
protected PageFileFactory<?> pageFileFactory;
@Override
protected void makeOptions(Parameterization config) {
super.makeOptions(config);
ObjectParameter<PageFileFactory<?>> pffP = new ObjectParameter<>(PAGEFILE_ID, PageFileFactory.class, MemoryPageFileFactory.class);
if (config.grab(pffP)) {
pageFileFactory = pffP.instantiateClass(config);
}
}
@Override
protected abstract PagedIndexFactory<O, ?> makeInstance();
}
}
|
