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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FastCrossSectionChunk.java @ 5430:ba489a16f4d8

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Datacage Function Resolver: Lift from static to object space.
author Sascha L. Teichmann <teichmann@intevation.de>
date Tue, 26 Mar 2013 16:16:12 +0100
parents 5642a83420f2
children
rev   line source
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dc28ea60b53d Added cached/chunked access to cross section lines. TODO: Use the FastCrossSectionLines.
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1 package de.intevation.flys.artifacts.model;
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2
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3 import java.util.List;
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4 import java.util.Collections;
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6 import java.io.Serializable;
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7
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8 import de.intevation.flys.model.CrossSection;
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9
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10 import de.intevation.flys.model.FastCrossSectionLine;
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11
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12 import org.apache.log4j.Logger;
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13
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14 public class FastCrossSectionChunk
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15 implements Serializable
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16 {
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17 private static Logger log = Logger.getLogger(FastCrossSectionChunk.class);
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18
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19 public static final String PREFIX = "FCSC:";
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20 public static final double KM_RANGE = 1.0;
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22 protected double startKm;
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23 protected int crossSectionId;
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25 protected List<FastCrossSectionLine> crossSectionLines;
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27 public FastCrossSectionChunk() {
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28 }
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30 public FastCrossSectionChunk(CrossSection cs, double km) {
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32 crossSectionId = cs.getId();
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33 startKm = Math.floor(km);
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34 double stopKm = startKm + KM_RANGE;
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35
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36 long startTime = System.currentTimeMillis();
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38 crossSectionLines = cs.getFastLines(startKm, stopKm);
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39
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40 long stopTime = System.currentTimeMillis();
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41
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42 if (log.isDebugEnabled()) {
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43 log.debug("Fetching cross section lines took " +
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44 (float)(stopTime-startTime)/1000f + " secs.");
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45 }
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46 }
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48 public FastCrossSectionLine getCrossSectionLine(double km) {
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49 FastCrossSectionLine key = new FastCrossSectionLine(km);
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50 int pos = Collections.binarySearch(
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51 crossSectionLines, key, FastCrossSectionLine.KM_CMP);
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52 return pos < 0 ? null : crossSectionLines.get(pos);
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53 }
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55 public static String createHashKey(CrossSection cs, double km) {
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56 return PREFIX + cs.getId() + ":" + (int)Math.floor(km);
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57 }
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59 public String getHashKey() {
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60 return PREFIX + crossSectionId + ":" + (int)Math.floor(startKm);
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61 }
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63 public double getStartKm() {
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64 return startKm;
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65 }
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67 public void setStartKm(double startKm) {
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68 this.startKm = startKm;
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69 }
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71 public double getStopKm() {
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72 return startKm + KM_RANGE;
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73 }
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75 public int getCrossSectionId() {
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76 return crossSectionId;
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77 }
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79 public void setCrossSectionId(int crossSectionId) {
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80 this.crossSectionId = crossSectionId;
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81 }
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82 }
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83 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org