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
|
package com.wcohen.ss.expt;
import com.wcohen.ss.*;
import com.wcohen.ss.api.*;
import java.util.Collections;
/**
* Train a StringDistanceLearner.
*/
public class BasicTeacher extends StringDistanceTeacher
{
private DistanceInstanceIterator distanceExamplePool;
private DistanceInstanceIterator distanceInstancePool;
private StringWrapperIterator wrapperIterator;
/** Create a teacher from a blocker and a dataset.
* Will train from all blocked pairs.
*/
public BasicTeacher(final Blocker blocker,final MatchData data)
{
blocker.block(data);
wrapperIterator = data.getIterator();
distanceInstancePool = new BasicDistanceInstanceIterator(Collections.EMPTY_SET.iterator());
distanceExamplePool =
new DistanceInstanceIterator() {
private int cursor=0;
public boolean hasNext() { return cursor<blocker.size(); }
public Object next() { return blocker.getPair( cursor++ ); }
public void remove() { throw new UnsupportedOperationException(); }
public DistanceInstance nextDistanceInstance() { return (DistanceInstance)next();}
};
}
/**
* Create a teacher using specific values for the various iterators.
*/
public BasicTeacher(
StringWrapperIterator wrapperIterator,
DistanceInstanceIterator distanceInstancePool,
DistanceInstanceIterator distanceExamplePool
)
{
this.wrapperIterator = wrapperIterator;
this.distanceInstancePool = distanceInstancePool;
this.distanceExamplePool = distanceExamplePool;
}
public StringWrapperIterator stringWrapperIterator()
{
return wrapperIterator;
}
public DistanceInstanceIterator distanceInstancePool()
{
return distanceInstancePool;
}
public DistanceInstanceIterator distanceExamplePool()
{
return distanceExamplePool;
}
public DistanceInstance labelInstance(DistanceInstance distanceInstance)
{
return distanceInstance;
}
public boolean hasAnswers()
{
return true;
}
}
|
