Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/FastCrossSectionChunk.java @ 6515:5f4893db41e4

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author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 28 Jun 2013 18:20:27 +0200
parents 44ee7d26eb18
children 0a5239a1e46e
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.model;
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10
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11 import java.util.List;
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12 import java.util.Collections;
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13
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14 import java.io.Serializable;
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15
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16 import org.dive4elements.river.model.CrossSection;
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17
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18 import org.dive4elements.river.model.FastCrossSectionLine;
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19
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20 import org.apache.log4j.Logger;
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21
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22 /**
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23 * Number of FastCrossSectionLines, e.g. to store in cache and retrieve
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24 * a single contain CrossSectionLine by its km.
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25 */
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26 public class FastCrossSectionChunk
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27 implements Serializable
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28 {
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29 private static Logger log = Logger.getLogger(FastCrossSectionChunk.class);
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30
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31 public static final String PREFIX = "FCSC:";
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32 public static final double KM_RANGE = 1.0;
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33
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34 protected double startKm;
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35 protected int crossSectionId;
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37 protected List<FastCrossSectionLine> crossSectionLines;
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39 public FastCrossSectionChunk() {
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40 }
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42 public FastCrossSectionChunk(CrossSection cs, double km) {
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44 crossSectionId = cs.getId();
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45 startKm = Math.floor(km);
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46 double stopKm = startKm + KM_RANGE;
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48 long startTime = System.currentTimeMillis();
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49
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50 crossSectionLines = cs.getFastLines(startKm, stopKm);
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52 long stopTime = System.currentTimeMillis();
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53
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54 if (log.isDebugEnabled()) {
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55 log.debug("Fetching cross section lines took " +
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56 (float)(stopTime-startTime)/1000f + " secs.");
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57 }
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58 }
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59
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60 /** Finds the FastCrossSectionLine at km (null if not found). */
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61 public FastCrossSectionLine getCrossSectionLine(double km) {
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62 FastCrossSectionLine key = new FastCrossSectionLine(km);
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63 int pos = Collections.binarySearch(
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64 crossSectionLines, key, FastCrossSectionLine.KM_CMP);
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65 return pos < 0 ? null : crossSectionLines.get(pos);
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66 }
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67
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68 public static String createHashKey(CrossSection cs, double km) {
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69 return PREFIX + cs.getId() + ":" + (int)Math.floor(km);
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70 }
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72 public String getHashKey() {
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73 return PREFIX + crossSectionId + ":" + (int)Math.floor(startKm);
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74 }
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76 public double getStartKm() {
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77 return startKm;
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78 }
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80 public void setStartKm(double startKm) {
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81 this.startKm = startKm;
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82 }
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84 public double getStopKm() {
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85 return startKm + KM_RANGE;
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86 }
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88 public int getCrossSectionId() {
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89 return crossSectionId;
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90 }
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92 public void setCrossSectionId(int crossSectionId) {
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93 this.crossSectionId = crossSectionId;
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94 }
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95 }
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96 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org