root / branches / v2_0_0_prep / libraries / libFMap_dal / src / org / gvsig / fmap / dal / feature / impl / featureSet / DefaultIterator.java @ 24496
History | View | Annotate | Download (1.74 KB)
1 | 24496 | jmvivo | package org.gvsig.fmap.dal.feature.impl.featureSet; |
---|---|---|---|
2 | 23820 | jjdelcerro | |
3 | import java.util.Iterator; |
||
4 | |||
5 | 24496 | jmvivo | import org.gvsig.fmap.dal.exceptions.DataException; |
6 | import org.gvsig.fmap.dal.feature.impl.DefaultFeature; |
||
7 | import org.gvsig.fmap.dal.feature.spi.FeatureData; |
||
8 | 23820 | jjdelcerro | |
9 | |||
10 | class DefaultIterator implements Iterator { |
||
11 | |||
12 | protected Iterator iterator; |
||
13 | protected DefaultFeatureSet fset;
|
||
14 | |||
15 | public DefaultIterator(DefaultFeatureSet featureSet) {
|
||
16 | this.fset = featureSet;
|
||
17 | } |
||
18 | |||
19 | 23894 | jjdelcerro | public DefaultIterator(DefaultFeatureSet featureSet, long index) |
20 | throws DataException {
|
||
21 | 23820 | jjdelcerro | this.fset = featureSet;
|
22 | if (index > 0) { |
||
23 | if (featureSet.provider.canIterateFromIndex()) {
|
||
24 | try {
|
||
25 | this.iterator = featureSet.provider.iterator(index);
|
||
26 | } catch (UnsupportedOperationException e) { |
||
27 | this.iterator = featureSet.provider.iterator();
|
||
28 | skypto(index); |
||
29 | } |
||
30 | } else {
|
||
31 | this.iterator = featureSet.provider.iterator();
|
||
32 | skypto(index); |
||
33 | } |
||
34 | } else {
|
||
35 | this.iterator = featureSet.provider.iterator();
|
||
36 | } |
||
37 | } |
||
38 | |||
39 | protected void skypto(long index) { |
||
40 | // TODO: Comprobar si esta bien la condicion de n<=
|
||
41 | for (long n = 0; n <= index && this.getIterator().hasNext(); n++, this |
||
42 | .getIterator() |
||
43 | .next()) { |
||
44 | ; |
||
45 | } |
||
46 | } |
||
47 | |||
48 | public boolean hasNext() { |
||
49 | fset.checkModified(); |
||
50 | return this.getIterator().hasNext(); |
||
51 | } |
||
52 | |||
53 | public Object next() { |
||
54 | fset.checkModified(); |
||
55 | return this.createFeature((FeatureData) this.getIterator().next()); |
||
56 | } |
||
57 | |||
58 | public void remove() { |
||
59 | throw new UnsupportedOperationException(); |
||
60 | |||
61 | } |
||
62 | |||
63 | protected DefaultFeature createFeature(FeatureData fData) {
|
||
64 | return new DefaultFeature(fset.store, fData); |
||
65 | } |
||
66 | |||
67 | protected Iterator getIterator() { |
||
68 | return this.iterator; |
||
69 | } |
||
70 | |||
71 | protected boolean isDeleted(FeatureData data) { |
||
72 | return false; |
||
73 | } |
||
74 | |||
75 | protected void doNext() throws DataException { |
||
76 | |||
77 | } |
||
78 | |||
79 | } |