Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/raster/PaletteManager.java @ 657:af3f56758f59
merged gnv-artifacts/0.5
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:53 +0200 |
| parents | f42ed4f10b79 |
| children | b1f5f2a8840f |
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| 590:5f5f273c8566 | 657:af3f56758f59 |
|---|---|
| 1 package de.intevation.gnv.raster; | |
| 2 | |
| 3 import java.util.HashMap; | |
| 4 | |
| 5 import java.lang.ref.SoftReference; | |
| 6 | |
| 7 /** | |
| 8 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) | |
| 9 */ | |
| 10 public class PaletteManager | |
| 11 { | |
| 12 protected Palette base; | |
| 13 | |
| 14 protected String description; | |
| 15 protected String name; | |
| 16 | |
| 17 protected HashMap<Integer, SoftReference<Palette>> levels; | |
| 18 | |
| 19 public PaletteManager() { | |
| 20 } | |
| 21 | |
| 22 public PaletteManager( | |
| 23 String name, | |
| 24 String description, | |
| 25 Palette base | |
| 26 ) { | |
| 27 this.name = name; | |
| 28 this.description = description; | |
| 29 this.base = base; | |
| 30 levels = new HashMap<Integer, SoftReference<Palette>>(); | |
| 31 } | |
| 32 | |
| 33 public String getDescription() { | |
| 34 return description; | |
| 35 } | |
| 36 | |
| 37 public String getName() { | |
| 38 return name; | |
| 39 } | |
| 40 | |
| 41 public Palette getBase() { | |
| 42 return base; | |
| 43 } | |
| 44 | |
| 45 public Palette getLevel(int n) { | |
| 46 if (n < 2) { | |
| 47 return base; | |
| 48 } | |
| 49 | |
| 50 Integer N = Integer.valueOf(n); | |
| 51 | |
| 52 Palette palette; | |
| 53 | |
| 54 synchronized (levels) { | |
| 55 SoftReference<Palette> ref = levels.get(N); | |
| 56 | |
| 57 if (ref != null && (palette = ref.get()) != null) { | |
| 58 return palette; | |
| 59 } | |
| 60 | |
| 61 palette = base.subdivide(n); | |
| 62 | |
| 63 ref = new SoftReference(palette); | |
| 64 | |
| 65 levels.put(N, ref); | |
| 66 } | |
| 67 | |
| 68 return palette; | |
| 69 } | |
| 70 } | |
| 71 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |