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 / DefaultFeatureComparator.java @ 46875
History | View | Annotate | Download (2.78 KB)
1 | 40559 | jjdelcerro | /**
|
---|---|---|---|
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 | 40435 | jjdelcerro | package org.gvsig.fmap.dal.feature.impl; |
25 | |||
26 | import java.util.Comparator; |
||
27 | import java.util.Iterator; |
||
28 | |||
29 | import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException; |
||
30 | import org.gvsig.fmap.dal.feature.Feature; |
||
31 | import org.gvsig.fmap.dal.feature.FeatureQueryOrder; |
||
32 | import org.gvsig.tools.evaluator.Evaluator; |
||
33 | import org.gvsig.tools.evaluator.EvaluatorData; |
||
34 | import org.gvsig.tools.evaluator.EvaluatorException; |
||
35 | |||
36 | public class DefaultFeatureComparator implements Comparator { |
||
37 | |||
38 | private FeatureQueryOrder order;
|
||
39 | |||
40 | |||
41 | public DefaultFeatureComparator(FeatureQueryOrder order) {
|
||
42 | this.order = order;
|
||
43 | // TODO optimizar en un array???
|
||
44 | |||
45 | } |
||
46 | |||
47 | |||
48 | private int myCompare(Object arg0, Object arg1) { |
||
49 | if (arg0 == null){ |
||
50 | if (arg1 == null){ |
||
51 | return 0; |
||
52 | } else{
|
||
53 | return 1; |
||
54 | } |
||
55 | } else if (arg1 == null){ |
||
56 | if (arg0 == null) { |
||
57 | return 0; |
||
58 | } else {
|
||
59 | return 1; |
||
60 | } |
||
61 | } |
||
62 | if (arg0 instanceof Comparable) { |
||
63 | return ((Comparable) arg0).compareTo(arg1); |
||
64 | } else if (arg1 instanceof Comparable) { |
||
65 | return ((Comparable) arg1).compareTo(arg0) * -1; |
||
66 | } |
||
67 | |||
68 | if (arg0.equals(arg1)){
|
||
69 | return 0; |
||
70 | } else{
|
||
71 | return -1; |
||
72 | } |
||
73 | |||
74 | } |
||
75 | |||
76 | public int compare(Object arg0, Object arg1) { |
||
77 | Iterator iter = this.order.iterator(); |
||
78 | int returnValue = 0; |
||
79 | Feature f0 = (Feature) arg0; |
||
80 | Feature f1 = (Feature) arg1; |
||
81 | Object item;
|
||
82 | String attrName;
|
||
83 | Evaluator evaluator; |
||
84 | while (returnValue == 0 && iter.hasNext()) { |
||
85 | item = iter.next(); |
||
86 | if (item instanceof String) { |
||
87 | attrName = (String) item;
|
||
88 | returnValue = this
|
||
89 | .myCompare(f0.get(attrName), f1 |
||
90 | .get(attrName)); |
||
91 | } else {
|
||
92 | evaluator = (Evaluator) item; |
||
93 | try {
|
||
94 | returnValue = this.myCompare(evaluator
|
||
95 | .evaluate((EvaluatorData) f0), evaluator |
||
96 | .evaluate((EvaluatorData) f1)); |
||
97 | } catch (EvaluatorException e) {
|
||
98 | throw new DataEvaluatorRuntimeException(e); |
||
99 | } |
||
100 | } |
||
101 | } |
||
102 | |||
103 | return returnValue;
|
||
104 | } |
||
105 | |||
106 | } |