svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / fmap / dal / feature / impl / featureset / DefaultIterator.java @ 47049
History | View | Annotate | Download (4.79 KB)
1 |
/**
|
---|---|
2 |
* gvSIG. Desktop Geographic Information System.
|
3 |
*
|
4 |
* Copyright (C) 2007-2013 gvSIG Association.
|
5 |
*
|
6 |
* This program is free software; you can redistribute it and/or
|
7 |
* modify it under the terms of the GNU General Public License
|
8 |
* as published by the Free Software Foundation; either version 3
|
9 |
* of the License, or (at your option) any later version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
14 |
* GNU General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License
|
17 |
* along with this program; if not, write to the Free Software
|
18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
19 |
* MA 02110-1301, USA.
|
20 |
*
|
21 |
* For any additional information, do not hesitate to contact us
|
22 |
* at info AT gvsig.com, or visit our website www.gvsig.com.
|
23 |
*/
|
24 |
package org.gvsig.fmap.dal.feature.impl.featureset; |
25 |
|
26 |
import java.util.Iterator; |
27 |
import java.util.NoSuchElementException; |
28 |
import org.gvsig.fmap.dal.exception.DataException; |
29 |
import org.gvsig.fmap.dal.feature.Feature; |
30 |
import org.gvsig.fmap.dal.feature.impl.DefaultFeature; |
31 |
import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
32 |
import org.gvsig.tools.dispose.DisposableIterator; |
33 |
import org.gvsig.tools.dispose.DisposeUtils; |
34 |
import org.gvsig.tools.dispose.impl.AbstractDisposable; |
35 |
import org.gvsig.tools.exception.BaseException; |
36 |
import org.slf4j.Logger; |
37 |
import org.slf4j.LoggerFactory; |
38 |
|
39 |
|
40 |
class DefaultIterator extends AbstractDisposable implements DisposableIterator { |
41 |
|
42 |
protected static final Logger LOGGER = LoggerFactory.getLogger(DefaultIterator.class); |
43 |
protected Iterator<FeatureProvider> iterator; |
44 |
protected DefaultFeatureSet fset;
|
45 |
protected Feature lastFeature = null; |
46 |
|
47 |
public DefaultIterator(DefaultFeatureSet featureSet) {
|
48 |
this.fset = featureSet;
|
49 |
DisposeUtils.bind(this.fset);
|
50 |
} |
51 |
|
52 |
public DefaultIterator(DefaultFeatureSet featureSet, long index, long elements) |
53 |
throws DataException {
|
54 |
this.fset = featureSet;
|
55 |
DisposeUtils.bind(this.fset);
|
56 |
if (index > 0) { |
57 |
if (featureSet.provider.canIterateFromIndex()) {
|
58 |
try {
|
59 |
this.iterator = featureSet.provider.iterator(index, elements);
|
60 |
} catch (UnsupportedOperationException e) { |
61 |
this.iterator = featureSet.provider.iterator();
|
62 |
skypto(index); |
63 |
} |
64 |
} else {
|
65 |
this.iterator = featureSet.provider.iterator();
|
66 |
skypto(index); |
67 |
} |
68 |
} else {
|
69 |
this.iterator = featureSet.provider.iterator();
|
70 |
} |
71 |
} |
72 |
|
73 |
protected void skypto(long index) { |
74 |
// TODO: Comprobar si esta bien la condicion de n<=
|
75 |
for (long n = 0; n <= index && this.getIterator().hasNext(); n++, this |
76 |
.getIterator() |
77 |
.next()) { |
78 |
; |
79 |
} |
80 |
} |
81 |
|
82 |
@Override
|
83 |
public boolean hasNext() { |
84 |
if (this.fset == null) { |
85 |
return false; |
86 |
} |
87 |
fset.checkSourceStoreModified(); |
88 |
if (this.getIterator().hasNext()) { |
89 |
return true; |
90 |
} |
91 |
try {
|
92 |
this.dispose();
|
93 |
} catch (Exception ex) { |
94 |
throw new RuntimeException("Can't dispose iterator.",ex); |
95 |
} |
96 |
return false; |
97 |
} |
98 |
|
99 |
@Override
|
100 |
public Object next() { |
101 |
if( fset == null ) { |
102 |
throw new NoSuchElementException(); |
103 |
} |
104 |
fset.checkSourceStoreModified(); |
105 |
lastFeature = null;
|
106 |
if (!this.hasNext()) { |
107 |
throw new NoSuchElementException(); |
108 |
} |
109 |
try {
|
110 |
lastFeature = this.createFeature((FeatureProvider) this.getIterator() |
111 |
.next()); |
112 |
return lastFeature;
|
113 |
} catch (DataException e) {
|
114 |
throw new RuntimeException(e); |
115 |
} |
116 |
} |
117 |
|
118 |
public void remove() { |
119 |
if (!fset.store.isEditing()) {
|
120 |
throw new UnsupportedOperationException(); |
121 |
} |
122 |
if (lastFeature == null) { |
123 |
throw new IllegalStateException(); |
124 |
} |
125 |
try {
|
126 |
this.fset.delete(this.lastFeature); |
127 |
} catch (DataException e) {
|
128 |
// FIXME Cambiar excepcion a una Runtime de DAL
|
129 |
throw new RuntimeException(e); |
130 |
} |
131 |
lastFeature = null;
|
132 |
} |
133 |
|
134 |
protected DefaultFeature createFeature(FeatureProvider fData)
|
135 |
throws DataException {
|
136 |
fData.setNew(false);
|
137 |
if (this.fset.transform.isEmpty()) { |
138 |
return new DefaultFeature(fset.store, fData); |
139 |
} else {
|
140 |
return (DefaultFeature) this.fset.transform.applyTransform( |
141 |
new DefaultFeature(fset.store, fData), fset
|
142 |
.getDefaultFeatureType()); |
143 |
} |
144 |
} |
145 |
|
146 |
protected Iterator getIterator() { |
147 |
return this.iterator; |
148 |
} |
149 |
|
150 |
protected boolean skipFeature(FeatureProvider data) { |
151 |
return false; |
152 |
} |
153 |
|
154 |
protected void doNext() throws DataException { |
155 |
|
156 |
} |
157 |
|
158 |
protected void doDispose() throws BaseException { |
159 |
DisposeUtils.disposeQuietly(this.iterator);
|
160 |
this.iterator = null; |
161 |
DisposeUtils.disposeQuietly(this.fset);
|
162 |
this.fset = null; |
163 |
this.lastFeature = null; |
164 |
} |
165 |
|
166 |
} |