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 @ 43020
History | View | Annotate | Download (6.73 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 |
|
31 |
import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException; |
32 |
import org.gvsig.tools.evaluator.Evaluator; |
33 |
import org.gvsig.tools.evaluator.EvaluatorData; |
34 |
import org.gvsig.tools.evaluator.EvaluatorException; |
35 |
import org.gvsig.tools.lang.Cloneable; |
36 |
import org.gvsig.tools.persistence.Persistent; |
37 |
import org.gvsig.tools.persistence.PersistentState; |
38 |
import org.gvsig.tools.persistence.exception.PersistenceException; |
39 |
|
40 |
public class FeatureQueryOrder implements Persistent, Cloneable, Iterable<FeatureQueryOrderMember> { |
41 |
|
42 |
private List members = new ArrayList(); |
43 |
|
44 |
public Object add(String attributeName, boolean ascending) { |
45 |
FeatureQueryOrderMember member = new FeatureQueryOrderMember(
|
46 |
attributeName, ascending); |
47 |
if (members.add(member)) {
|
48 |
return member;
|
49 |
} |
50 |
return null; |
51 |
} |
52 |
|
53 |
public Object add(Evaluator evaluator, boolean ascending) { |
54 |
FeatureQueryOrderMember member = new FeatureQueryOrderMember(
|
55 |
evaluator, |
56 |
ascending); |
57 |
if (members.add(member)) {
|
58 |
return member;
|
59 |
} |
60 |
return null; |
61 |
} |
62 |
|
63 |
@Override
|
64 |
public Iterator<FeatureQueryOrderMember> iterator() { |
65 |
if( members == null ) { |
66 |
return new Iterator<FeatureQueryOrderMember>() { |
67 |
@Override
|
68 |
public boolean hasNext() { |
69 |
return false; |
70 |
} |
71 |
|
72 |
@Override
|
73 |
public FeatureQueryOrderMember next() {
|
74 |
throw new NoSuchElementException(); |
75 |
} |
76 |
|
77 |
@Override
|
78 |
public void remove() { |
79 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
80 |
} |
81 |
}; |
82 |
} |
83 |
return members.iterator();
|
84 |
} |
85 |
|
86 |
public boolean remove(FeatureQueryOrderMember member) { |
87 |
return members.remove(member);
|
88 |
} |
89 |
|
90 |
public void remove(int index) { |
91 |
members.remove(index); |
92 |
} |
93 |
|
94 |
public void clear() { |
95 |
members.clear(); |
96 |
} |
97 |
|
98 |
public int size() { |
99 |
return this.members.size(); |
100 |
} |
101 |
|
102 |
public Comparator getFeatureComparator() { |
103 |
return new DefaultFeatureComparator(this); |
104 |
} |
105 |
|
106 |
public Object clone() throws CloneNotSupportedException { |
107 |
FeatureQueryOrder clone = (FeatureQueryOrder) super.clone();
|
108 |
|
109 |
if (members != null) { |
110 |
clone.members = new ArrayList(members.size()); |
111 |
for (int i = 0; i < members.size(); i++) { |
112 |
clone.members.add(((Cloneable) members.get(i)).clone());
|
113 |
} |
114 |
} |
115 |
|
116 |
return clone;
|
117 |
} |
118 |
|
119 |
public FeatureQueryOrder getCopy() {
|
120 |
FeatureQueryOrder aCopy = new FeatureQueryOrder();
|
121 |
Iterator iter = this.members.iterator(); |
122 |
FeatureQueryOrderMember member; |
123 |
while (iter.hasNext()) {
|
124 |
member = (FeatureQueryOrderMember) iter.next(); |
125 |
if (member.hasEvaluator()) {
|
126 |
aCopy.add(member.getEvaluator(), member.getAscending()); |
127 |
} else {
|
128 |
aCopy.add(member.getAttributeName(), member.getAscending()); |
129 |
} |
130 |
} |
131 |
return aCopy;
|
132 |
} |
133 |
|
134 |
public void loadFromState(PersistentState state) |
135 |
throws PersistenceException {
|
136 |
this.members = (List) state.get("menbers"); |
137 |
} |
138 |
|
139 |
public void saveToState(PersistentState state) throws PersistenceException { |
140 |
state.set("menbers", members);
|
141 |
} |
142 |
|
143 |
private class DefaultFeatureComparator implements Comparator { |
144 |
|
145 |
private FeatureQueryOrder order;
|
146 |
|
147 |
public DefaultFeatureComparator(FeatureQueryOrder order) {
|
148 |
this.order = order;
|
149 |
// TODO optimizar en un array???
|
150 |
|
151 |
} |
152 |
|
153 |
private int myCompare(Object arg0, Object arg1) { |
154 |
if (arg0 == null) { |
155 |
if (arg1 == null) { |
156 |
return 0; |
157 |
} else {
|
158 |
return 1; |
159 |
} |
160 |
} else if (arg1 == null) { |
161 |
if (arg0 == null) { |
162 |
return 0; |
163 |
} else {
|
164 |
return 1; |
165 |
} |
166 |
} |
167 |
if (arg0 instanceof Comparable) { |
168 |
return ((Comparable) arg0).compareTo(arg1); |
169 |
} else if (arg1 instanceof Comparable) { |
170 |
return ((Comparable) arg1).compareTo(arg0) * -1; |
171 |
} |
172 |
|
173 |
if (arg0.equals(arg1)) {
|
174 |
return 0; |
175 |
} else {
|
176 |
return -1; |
177 |
} |
178 |
|
179 |
} |
180 |
|
181 |
public int compare(Object arg0, Object arg1) { |
182 |
Iterator iter = this.order.iterator(); |
183 |
int returnValue = 0; |
184 |
Feature f0 = (Feature) arg0; |
185 |
Feature f1 = (Feature) arg1; |
186 |
Object item;
|
187 |
String attrName;
|
188 |
Evaluator evaluator; |
189 |
while (returnValue == 0 && iter.hasNext()) { |
190 |
item = iter.next(); |
191 |
if (item instanceof String) { |
192 |
attrName = (String) item;
|
193 |
returnValue = this
|
194 |
.myCompare(f0.get(attrName), f1 |
195 |
.get(attrName)); |
196 |
} else {
|
197 |
evaluator = (Evaluator) item; |
198 |
try {
|
199 |
returnValue = this.myCompare(evaluator
|
200 |
.evaluate((EvaluatorData) f0), evaluator |
201 |
.evaluate((EvaluatorData) f1)); |
202 |
} catch (EvaluatorException e) {
|
203 |
throw new DataEvaluatorRuntimeException(e); |
204 |
} |
205 |
} |
206 |
} |
207 |
|
208 |
return returnValue;
|
209 |
} |
210 |
|
211 |
} |
212 |
|
213 |
} |