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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
package de.lmu.ifi.dbs.elki.database.relation;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
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.data.type.SimpleTypeInformation;
import de.lmu.ifi.dbs.elki.database.Database;
import de.lmu.ifi.dbs.elki.database.datastore.DataStore;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreFactory;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreUtil;
import de.lmu.ifi.dbs.elki.database.datastore.WritableDataStore;
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.database.ids.DBIDUtil;
import de.lmu.ifi.dbs.elki.database.ids.DBIDs;
import de.lmu.ifi.dbs.elki.database.ids.StaticDBIDs;
import de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult;
import de.lmu.ifi.dbs.elki.utilities.iterator.IterableIterator;
import de.lmu.ifi.dbs.elki.utilities.iterator.IterableUtil;
/**
* Represents a single representation. This is attached to a DBIDs object, which
* you are supposed to manage first. I.e. put the new DBID in, then invoke
* set(), remove the DBID, then delete().
*
* TODO: is this semantic sane?
*
* @author Erich Schubert
*
* @param <O> Data type
*/
public class MaterializedRelation<O> extends AbstractHierarchicalResult implements Relation<O> {
/**
* Our database
*/
private final Database database;
/**
* The class of objects we store.
*/
private final SimpleTypeInformation<O> type;
/**
* Map to hold the objects of the database.
*/
private final DataStore<O> content;
/**
* The DBIDs this is supposed to be defined for.
*
* Note: we only keep an unmodifiable reference.
*/
private final StaticDBIDs ids;
/**
* The relation name.
*/
private String name;
/**
* The relation name (short version)
*/
private String shortname = "relation";
/**
* Constructor.
*
* @param database Database
* @param type Type information
* @param ids IDs
*/
public MaterializedRelation(Database database, SimpleTypeInformation<O> type, DBIDs ids) {
this(database, type, ids, null);
}
/**
* Constructor.
*
* @param database Database
* @param type Type information
* @param ids IDs
* @param name Name
*/
public MaterializedRelation(Database database, SimpleTypeInformation<O> type, DBIDs ids, String name) {
// We can't call this() since we'll have generics issues then.
super();
this.database = database;
this.type = type;
this.ids = DBIDUtil.makeUnmodifiable(ids);
this.name = name;
this.content = DataStoreUtil.makeStorage(ids, DataStoreFactory.HINT_DB, type.getRestrictionClass());
}
/**
* Constructor.
*
* @param database Database
* @param type Type information
* @param ids IDs
* @param name Name
* @param content Content
*/
public MaterializedRelation(Database database, SimpleTypeInformation<O> type, DBIDs ids, String name, DataStore<O> content) {
super();
this.database = database;
this.type = type;
this.ids = DBIDUtil.makeUnmodifiable(ids);
this.name = name;
this.content = content;
}
/**
* Constructor.
* @param name Name
* @param shortname Short name of the result
* @param type Type information
* @param content Content
* @param ids IDs
*/
public MaterializedRelation(String name, String shortname, SimpleTypeInformation<O> type, DataStore<O> content, DBIDs ids) {
super();
this.database = null;
this.type = type;
this.ids = DBIDUtil.makeUnmodifiable(ids);
this.name = name;
this.shortname = shortname;
this.content = content;
}
@Override
public Database getDatabase() {
return database;
}
@Override
public O get(DBID id) {
return content.get(id);
}
@Override
public void set(DBID id, O val) {
assert (ids.contains(id));
if(content instanceof WritableDataStore) {
((WritableDataStore<O>) content).put(id, val);
}
}
/**
* Delete an objects values.
*
* @param id ID to delete
*/
@Override
public void delete(DBID id) {
assert (!ids.contains(id));
if(content instanceof WritableDataStore) {
((WritableDataStore<O>) content).delete(id);
}
}
@Override
public StaticDBIDs getDBIDs() {
return ids;
}
@Override
public IterableIterator<DBID> iterDBIDs() {
return IterableUtil.fromIterable(ids);
}
@Override
public int size() {
return ids.size();
}
@Override
public SimpleTypeInformation<O> getDataTypeInformation() {
return type;
}
@Override
public String getLongName() {
if(name != null) {
return name;
}
return type.toString();
}
@Override
public String getShortName() {
return shortname;
}
}
|
