svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.api / src / main / java / org / gvsig / fmap / dal / feature / FeatureQueryOrder.java @ 44331
History | View | Annotate | Download (9.97 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 modify it under
|
7 |
* the terms of the GNU General Public License as published by the Free Software
|
8 |
* Foundation; either version 3 of the License, or (at your option) any later
|
9 |
* version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful, but WITHOUT
|
12 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
13 |
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
14 |
* details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License along with
|
17 |
* this program; if not, write to the Free Software Foundation, Inc., 51
|
18 |
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
19 |
*
|
20 |
* For any additional information, do not hesitate to contact us at info AT
|
21 |
* gvsig.com, or visit our website www.gvsig.com.
|
22 |
*/
|
23 |
package org.gvsig.fmap.dal.feature; |
24 |
|
25 |
import java.util.ArrayList; |
26 |
import java.util.Comparator; |
27 |
import java.util.Iterator; |
28 |
import java.util.List; |
29 |
import java.util.NoSuchElementException; |
30 |
import org.apache.commons.lang3.StringUtils; |
31 |
|
32 |
import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException; |
33 |
import org.gvsig.tools.evaluator.Evaluator; |
34 |
import org.gvsig.tools.evaluator.EvaluatorData; |
35 |
import org.gvsig.tools.evaluator.EvaluatorException; |
36 |
import org.gvsig.tools.lang.Cloneable; |
37 |
import org.gvsig.tools.persistence.Persistent; |
38 |
import org.gvsig.tools.persistence.PersistentState; |
39 |
import org.gvsig.tools.persistence.exception.PersistenceException; |
40 |
|
41 |
public class FeatureQueryOrder implements Persistent, Cloneable { |
42 |
|
43 |
public class FeatureQueryOrderMember implements Persistent, org.gvsig.tools.lang.Cloneable { |
44 |
|
45 |
String attributeName = null; |
46 |
Evaluator evaluator = null;
|
47 |
boolean ascending;
|
48 |
|
49 |
FeatureQueryOrderMember(String attributeName, boolean ascending) { |
50 |
this.attributeName = attributeName;
|
51 |
this.ascending = ascending;
|
52 |
} |
53 |
|
54 |
FeatureQueryOrderMember(Evaluator evaluator, boolean ascending) {
|
55 |
this.evaluator = evaluator;
|
56 |
this.ascending = ascending;
|
57 |
} |
58 |
|
59 |
public boolean hasEvaluator() { |
60 |
return this.evaluator != null; |
61 |
} |
62 |
|
63 |
public Evaluator getEvaluator() {
|
64 |
return this.evaluator; |
65 |
} |
66 |
|
67 |
public boolean getAscending() { |
68 |
return this.ascending; |
69 |
} |
70 |
|
71 |
public String getAttributeName() { |
72 |
return this.attributeName; |
73 |
} |
74 |
|
75 |
@Override
|
76 |
public void loadFromState(PersistentState state) |
77 |
throws PersistenceException {
|
78 |
this.attributeName = state.getString("attributeName"); |
79 |
this.ascending = state.getBoolean("ascending"); |
80 |
this.evaluator = (Evaluator) state.get("evaluator"); |
81 |
} |
82 |
|
83 |
@Override
|
84 |
public void saveToState(PersistentState state) |
85 |
throws PersistenceException {
|
86 |
state.set("attributeName", this.attributeName); |
87 |
state.set("ascending", this.ascending); |
88 |
if (this.evaluator != null) { |
89 |
state.set("evaluator", evaluator);
|
90 |
} |
91 |
|
92 |
} |
93 |
|
94 |
@Override
|
95 |
public FeatureQueryOrderMember clone() throws CloneNotSupportedException { |
96 |
// Nothing more to clone
|
97 |
return (FeatureQueryOrderMember) super.clone(); |
98 |
} |
99 |
|
100 |
} |
101 |
|
102 |
private List members = new ArrayList(); |
103 |
|
104 |
public FeatureQueryOrder() {
|
105 |
} |
106 |
|
107 |
public Object add(String order) { |
108 |
if( StringUtils.isEmpty(order) ) {
|
109 |
return null; |
110 |
} |
111 |
Object r = null; |
112 |
String[] attributes = StringUtils.split(order, ','); |
113 |
for (String attribute : attributes) { |
114 |
boolean ascending = true; |
115 |
if( attribute.startsWith("+") ) { |
116 |
ascending = true;
|
117 |
attribute = attribute.substring(1);
|
118 |
} else if( attribute.startsWith("-") ) { |
119 |
ascending = false;
|
120 |
attribute = attribute.substring(1);
|
121 |
} |
122 |
attribute = attribute.trim(); |
123 |
r = this.add(attribute,ascending);
|
124 |
} |
125 |
return r;
|
126 |
} |
127 |
|
128 |
public Object add(String attributeName, boolean ascending) { |
129 |
FeatureQueryOrderMember member = new FeatureQueryOrderMember(
|
130 |
attributeName, ascending); |
131 |
if (members.add(member)) {
|
132 |
return member;
|
133 |
} |
134 |
return null; |
135 |
} |
136 |
|
137 |
public Object add(Evaluator evaluator, boolean ascending) { |
138 |
FeatureQueryOrderMember member = new FeatureQueryOrderMember(
|
139 |
evaluator, |
140 |
ascending); |
141 |
if (members.add(member)) {
|
142 |
return member;
|
143 |
} |
144 |
return null; |
145 |
} |
146 |
|
147 |
public Iterable<FeatureQueryOrderMember> members() { |
148 |
// Me hubiese gustado que FeatureQueryOrder fuese Iterable, pero no se deja por
|
149 |
// que FeatureQueryOrderMember es una clase interna y no esta definida en el
|
150 |
// momento de poner el :
|
151 |
// implements Iterable<FeatureQueryOrderMember>
|
152 |
// Y si saco a una clase independiente FeatureQueryOrderMember se pierde
|
153 |
// compatibilidad binaria con quien la esta usando.
|
154 |
// Para rodearlo, he creado el metodo members.
|
155 |
return new Iterable<FeatureQueryOrderMember> () { |
156 |
|
157 |
@Override
|
158 |
public Iterator<FeatureQueryOrderMember> iterator() { |
159 |
return FeatureQueryOrder.this.iterator();
|
160 |
} |
161 |
}; |
162 |
} |
163 |
|
164 |
public Iterator<FeatureQueryOrderMember> iterator() { |
165 |
if (members == null) { |
166 |
return new Iterator<FeatureQueryOrderMember>() { |
167 |
@Override
|
168 |
public boolean hasNext() { |
169 |
return false; |
170 |
} |
171 |
|
172 |
@Override
|
173 |
public FeatureQueryOrderMember next() {
|
174 |
throw new NoSuchElementException(); |
175 |
} |
176 |
|
177 |
@Override
|
178 |
public void remove() { |
179 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
180 |
} |
181 |
}; |
182 |
} |
183 |
return members.iterator();
|
184 |
} |
185 |
|
186 |
public boolean remove(FeatureQueryOrderMember member) { |
187 |
return members.remove(member);
|
188 |
} |
189 |
|
190 |
public void remove(int index) { |
191 |
members.remove(index); |
192 |
} |
193 |
|
194 |
public void clear() { |
195 |
members.clear(); |
196 |
} |
197 |
|
198 |
public int size() { |
199 |
return this.members.size(); |
200 |
} |
201 |
|
202 |
public Comparator getFeatureComparator() { |
203 |
return new DefaultFeatureComparator(this); |
204 |
} |
205 |
|
206 |
public Object clone() throws CloneNotSupportedException { |
207 |
FeatureQueryOrder clone = (FeatureQueryOrder) super.clone();
|
208 |
|
209 |
if (members != null) { |
210 |
clone.members = new ArrayList(members.size()); |
211 |
for (int i = 0; i < members.size(); i++) { |
212 |
clone.members.add(((Cloneable) members.get(i)).clone());
|
213 |
} |
214 |
} |
215 |
|
216 |
return clone;
|
217 |
} |
218 |
|
219 |
public FeatureQueryOrder getCopy() {
|
220 |
FeatureQueryOrder aCopy = new FeatureQueryOrder();
|
221 |
Iterator iter = this.members.iterator(); |
222 |
FeatureQueryOrderMember member; |
223 |
while (iter.hasNext()) {
|
224 |
member = (FeatureQueryOrderMember) iter.next(); |
225 |
if (member.hasEvaluator()) {
|
226 |
aCopy.add(member.getEvaluator(), member.getAscending()); |
227 |
} else {
|
228 |
aCopy.add(member.getAttributeName(), member.getAscending()); |
229 |
} |
230 |
} |
231 |
return aCopy;
|
232 |
} |
233 |
|
234 |
public void loadFromState(PersistentState state) |
235 |
throws PersistenceException {
|
236 |
this.members = (List) state.get("menbers"); |
237 |
} |
238 |
|
239 |
public void saveToState(PersistentState state) throws PersistenceException { |
240 |
state.set("menbers", members);
|
241 |
} |
242 |
|
243 |
private class DefaultFeatureComparator implements Comparator { |
244 |
|
245 |
private FeatureQueryOrder order;
|
246 |
|
247 |
public DefaultFeatureComparator(FeatureQueryOrder order) {
|
248 |
this.order = order;
|
249 |
// TODO optimizar en un array???
|
250 |
|
251 |
} |
252 |
|
253 |
private int myCompare(Object arg0, Object arg1) { |
254 |
if (arg0 == null) { |
255 |
if (arg1 == null) { |
256 |
return 0; |
257 |
} else {
|
258 |
return 1; |
259 |
} |
260 |
} else if (arg1 == null) { |
261 |
if (arg0 == null) { |
262 |
return 0; |
263 |
} else {
|
264 |
return 1; |
265 |
} |
266 |
} |
267 |
if (arg0 instanceof Comparable) { |
268 |
return ((Comparable) arg0).compareTo(arg1); |
269 |
} else if (arg1 instanceof Comparable) { |
270 |
return ((Comparable) arg1).compareTo(arg0) * -1; |
271 |
} |
272 |
|
273 |
if (arg0.equals(arg1)) {
|
274 |
return 0; |
275 |
} else {
|
276 |
return -1; |
277 |
} |
278 |
|
279 |
} |
280 |
|
281 |
public int compare(Object arg0, Object arg1) { |
282 |
Iterator iter = this.order.iterator(); |
283 |
int returnValue = 0; |
284 |
Feature f0 = (Feature) arg0; |
285 |
Feature f1 = (Feature) arg1; |
286 |
Object item;
|
287 |
String attrName;
|
288 |
Evaluator evaluator; |
289 |
while (returnValue == 0 && iter.hasNext()) { |
290 |
item = iter.next(); |
291 |
if (item instanceof String) { |
292 |
attrName = (String) item;
|
293 |
returnValue = this
|
294 |
.myCompare(f0.get(attrName), f1 |
295 |
.get(attrName)); |
296 |
} else {
|
297 |
evaluator = (Evaluator) item; |
298 |
try {
|
299 |
returnValue = this.myCompare(evaluator
|
300 |
.evaluate((EvaluatorData) f0), evaluator |
301 |
.evaluate((EvaluatorData) f1)); |
302 |
} catch (EvaluatorException e) {
|
303 |
throw new DataEvaluatorRuntimeException(e); |
304 |
} |
305 |
} |
306 |
} |
307 |
|
308 |
return returnValue;
|
309 |
} |
310 |
|
311 |
} |
312 |
|
313 |
} |