root / branches / v2_0_0_prep / libraries / libFMap_dal / src / org / gvsig / fmap / dal / feature / impl / featureSet / FeatureDataComparator.java @ 24496
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1 | 24496 | jmvivo | package org.gvsig.fmap.dal.feature.impl.featureSet; |
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2 | 23820 | jjdelcerro | |
3 | import java.util.Comparator; |
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4 | import java.util.Iterator; |
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5 | |||
6 | 24496 | jmvivo | import org.gvsig.fmap.dal.exceptions.DataEvaluatorRuntimeException; |
7 | import org.gvsig.fmap.dal.feature.FeatureQueryOrder; |
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8 | import org.gvsig.fmap.dal.feature.FeatureQueryOrder.FeatureQueryOrderMember; |
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9 | import org.gvsig.fmap.dal.feature.impl.DefaultFeature; |
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10 | import org.gvsig.fmap.dal.feature.impl.DefaultFeatureStore; |
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11 | import org.gvsig.fmap.dal.feature.spi.FeatureData; |
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12 | 24433 | jjdelcerro | import org.gvsig.tools.evaluator.EvaluatorException; |
13 | 23820 | jjdelcerro | |
14 | /*
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15 | *
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16 | * Compara dos Feature o FeatureData.
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17 | */
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18 | public class FeatureDataComparator implements Comparator { |
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19 | |||
20 | private FeatureQueryOrder order;
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21 | private DefaultFeature f1;
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22 | private DefaultFeature f2;
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23 | private DefaultFeatureStore store;
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24 | |||
25 | public FeatureDataComparator(DefaultFeatureStore store, FeatureQueryOrder order) {
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26 | this.order = order;
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27 | this.store = store;
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28 | this.f1 = new DefaultFeature(this.store); |
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29 | this.f2 = new DefaultFeature(this.store); |
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30 | } |
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31 | |||
32 | public int compare(Object arg0, Object arg1) { |
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33 | FeatureQueryOrderMember order; |
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34 | Comparable v1;
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35 | Comparable v2;
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36 | int v;
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37 | |||
38 | f1.setData((FeatureData) arg1); |
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39 | f2.setData((FeatureData) arg1); |
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40 | |||
41 | Iterator iterator = this.order.iterator(); |
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42 | while (iterator.hasNext()) {
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43 | order = (FeatureQueryOrderMember)iterator.next(); |
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44 | if( order.hasEvaluator() ) {
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45 | 24433 | jjdelcerro | try {
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46 | v1 = (Comparable) order.getEvaluator().evaluate(f1);
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47 | v2 = (Comparable) order.getEvaluator().evaluate(f2);
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48 | } catch (EvaluatorException e) {
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49 | throw new DataEvaluatorRuntimeException(e); |
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50 | } |
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51 | 23820 | jjdelcerro | } else {
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52 | v1 = (Comparable) f1.get(order.getAttributeName());
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53 | v2 = (Comparable) f2.get(order.getAttributeName());
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54 | } |
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55 | v = v1.compareTo(v2); |
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56 | if (v != 0) { |
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57 | if (order.getAscending()) {
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58 | return v;
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59 | } else {
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60 | return -v;
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61 | } |
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62 | } |
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63 | } |
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64 | return 0; |
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65 | } |
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66 | |||
67 | } |