-
Notifications
You must be signed in to change notification settings - Fork 6
Expand file tree
/
Copy pathIxJoin.java
More file actions
67 lines (52 loc) · 1.73 KB
/
Copy pathIxJoin.java
File metadata and controls
67 lines (52 loc) · 1.73 KB
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
/*
* Copyright 2011-2016 David Karnok
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ix;
import java.util.Iterator;
final class IxJoin<T> extends IxSource<T, String> {
final CharSequence separator;
IxJoin(Iterable<T> source, CharSequence separator) {
super(source);
this.separator = separator;
}
@Override
public Iterator<String> iterator() {
return new JoinIterator<T>(source.iterator(), separator);
}
static final class JoinIterator<T> extends IxSourceIterator<T, String> {
final CharSequence separator;
JoinIterator(Iterator<T> it, CharSequence separator) {
super(it);
this.separator = separator;
}
@Override
protected boolean moveNext() {
CharSequence sep = separator;
Iterator<T> it = this.it;
StringBuilder b = new StringBuilder();
if (it.hasNext()) {
b.append(it.next());
while (it.hasNext()) {
b.append(sep);
b.append(it.next());
}
}
value = b.toString();
hasValue = true;
done = true;
return true;
}
}
}