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comparison src/nabble/model/FilteredNodeIterator.java @ 0:7ecd1a4ef557

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 21 Mar 2019 19:15:52 -0600
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-1:000000000000 0:7ecd1a4ef557
1 package nabble.model;
2
3 import java.util.NoSuchElementException;
4 import fschmidt.util.java.Filter;
5
6
7 public final class FilteredNodeIterator extends NodeIterator<Node> {
8 private final NodeIterator<? extends Node> iter;
9 private final Filter<Node> filter;
10 private Node next = null;
11
12 public FilteredNodeIterator(NodeIterator<? extends Node> iter,Filter<Node> filter) {
13 this.iter = iter;
14 this.filter = filter;
15 }
16
17 public boolean hasNext() {
18 while( next == null && iter.hasNext() ) {
19 Node node = iter.next();
20 if( filter.ok(node) )
21 next = node;
22 }
23 return next != null;
24 }
25
26 public Node next() throws NoSuchElementException {
27 if( !hasNext() )
28 throw new NoSuchElementException();
29 Node node = next;
30 next = null;
31 return node;
32 }
33
34 public void close() {
35 iter.close();
36 }
37
38 }