Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FastCrossSectionChunk.java @ 2119:dc28ea60b53d
Added cached/chunked access to cross section lines. TODO: Use the FastCrossSectionLines.
flys-artifacts/trunk@3689 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Mon, 16 Jan 2012 15:51:46 +0000 |
| parents | |
| children | d626ae185305 |
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| 2118:4d57d456e261 | 2119:dc28ea60b53d |
|---|---|
| 1 package de.intevation.flys.artifacts.model; | |
| 2 | |
| 3 import java.util.ArrayList; | |
| 4 import java.util.List; | |
| 5 import java.util.Collections; | |
| 6 | |
| 7 import java.io.Serializable; | |
| 8 | |
| 9 import de.intevation.flys.model.CrossSectionLine; | |
| 10 import de.intevation.flys.model.CrossSection; | |
| 11 | |
| 12 public class FastCrossSectionChunk | |
| 13 implements Serializable | |
| 14 { | |
| 15 public static final String PREFIX = "FCSC:"; | |
| 16 public static final double KM_RANGE = 1.0; | |
| 17 | |
| 18 protected double startKm; | |
| 19 protected int crossSectionId; | |
| 20 | |
| 21 protected List<FastCrossSectionLine> crossSectionLines; | |
| 22 | |
| 23 public FastCrossSectionChunk() { | |
| 24 } | |
| 25 | |
| 26 public FastCrossSectionChunk(CrossSection cs, double km) { | |
| 27 | |
| 28 crossSectionId = cs.getId(); | |
| 29 startKm = Math.floor(km); | |
| 30 double stopKm = startKm + KM_RANGE; | |
| 31 | |
| 32 List<CrossSectionLine> csls = cs.getLines(startKm, stopKm); | |
| 33 | |
| 34 crossSectionLines = new ArrayList | |
| 35 <FastCrossSectionLine>(csls.size()); | |
| 36 | |
| 37 for (CrossSectionLine csl: csls) { | |
| 38 crossSectionLines.add(new FastCrossSectionLine(csl)); | |
| 39 } | |
| 40 } | |
| 41 | |
| 42 public FastCrossSectionLine getCrossSectionLine(double km) { | |
| 43 FastCrossSectionLine key = new FastCrossSectionLine(km); | |
| 44 int pos = Collections.binarySearch( | |
| 45 crossSectionLines, key, FastCrossSectionLine.KM_CMP); | |
| 46 return pos < 0 ? null : crossSectionLines.get(pos); | |
| 47 } | |
| 48 | |
| 49 public static String createHashKey(CrossSection cs, double km) { | |
| 50 return PREFIX + cs.getId() + ":" + (int)Math.floor(km); | |
| 51 } | |
| 52 | |
| 53 public String getHashKey() { | |
| 54 return PREFIX + crossSectionId + ":" + (int)Math.floor(startKm); | |
| 55 } | |
| 56 | |
| 57 public double getStartKm() { | |
| 58 return startKm; | |
| 59 } | |
| 60 | |
| 61 public void setStartKm(double startKm) { | |
| 62 this.startKm = startKm; | |
| 63 } | |
| 64 | |
| 65 public double getStopKm() { | |
| 66 return startKm + KM_RANGE; | |
| 67 } | |
| 68 | |
| 69 public int getCrossSectionId() { | |
| 70 return crossSectionId; | |
| 71 } | |
| 72 | |
| 73 public void setCrossSectionId(int crossSectionId) { | |
| 74 this.crossSectionId = crossSectionId; | |
| 75 } | |
| 76 } | |
| 77 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |