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16 package org.argeo.jcr;
17
18 import java.util.Collection;
19 import java.util.Iterator;
20 import java.util.NoSuchElementException;
21
22 import javax.jcr.Node;
23 import javax.jcr.NodeIterator;
24
25
26 public class CollectionNodeIterator implements NodeIterator {
27 private final Long collectionSize;
28 private final Iterator<Node> iterator;
29 private Integer position = 0;
30
31 public CollectionNodeIterator(Collection<Node> nodes) {
32 super();
33 this.collectionSize = (long) nodes.size();
34 this.iterator = nodes.iterator();
35 }
36
37 public void skip(long skipNum) {
38 if (skipNum < 0)
39 throw new IllegalArgumentException(
40 "Skip count has to be positive: " + skipNum);
41
42 for (long i = 0; i < skipNum; i++) {
43 if (!hasNext())
44 throw new NoSuchElementException("Last element past (position="
45 + getPosition() + ")");
46 nextNode();
47 }
48 }
49
50 public long getSize() {
51 return collectionSize;
52 }
53
54 public long getPosition() {
55 return position;
56 }
57
58 public boolean hasNext() {
59 return iterator.hasNext();
60 }
61
62 public Object next() {
63 return nextNode();
64 }
65
66 public void remove() {
67 iterator.remove();
68 }
69
70 public Node nextNode() {
71 Node node = iterator.next();
72 position++;
73 return node;
74 }
75
76 }