blob: cf3817806742bc304ec017cb2549f3d628adf26d (
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
|
package de.lmu.ifi.dbs.elki.data.type;
/*
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/>.
*/
/**
* Class wrapping a particular data type.
*
* @author Erich Schubert
*
* @param <T> Java type we represent.
*/
public class SimpleTypeInformation<T> implements TypeInformation {
/**
* The restriction class we represent.
*/
private Class<? super T> cls;
/**
* Constructor.
*
* @param cls restriction class
*/
public SimpleTypeInformation(Class<? super T> cls) {
super();
this.cls = cls;
}
/**
* Get the raw restriction class.
*
* @return Restriction class
*/
public final Class<? super T> getRestrictionClass() {
return cls;
}
@Override
public boolean isAssignableFromType(TypeInformation type) {
if(!(type instanceof SimpleTypeInformation)) {
return false;
}
final SimpleTypeInformation<?> simpleType = (SimpleTypeInformation<?>) type;
return cls.isAssignableFrom(simpleType.getRestrictionClass());
}
@Override
public boolean isAssignableFrom(Object other) {
return cls.isInstance(other);
}
/**
* Cast the object to type T (actually to the given restriction class!)
*
* @param other Object to cast.
* @return Instance
*/
@SuppressWarnings("unchecked")
public T cast(Object other) {
return (T) cls.cast(other);
}
/**
* Pseudo constructor that is often convenient to use when T is not completely
* known.
*
* @param <T> Type
* @param cls Class restriction
* @return Type
*/
public static <T> SimpleTypeInformation<T> get(Class<T> cls) {
return new SimpleTypeInformation<T>(cls);
}
@Override
public String toString() {
return getRestrictionClass().getSimpleName();
}
}
|
