Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/PaletteManager.java @ 605:e8ebdbc7f1e3

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First step of removing the cache blob. The static part of the describe document will be created by using the input data stored at each state. Some TODOs left (see ChangeLog). gnv-artifacts/trunk@671 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 09 Feb 2010 14:27:55 +0000
parents f42ed4f10b79
children b1f5f2a8840f
rev   line source
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1 package de.intevation.gnv.raster;
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2
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3 import java.util.HashMap;
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4
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5 import java.lang.ref.SoftReference;
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6
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7 /**
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8 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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9 */
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10 public class PaletteManager
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11 {
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12 protected Palette base;
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13
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14 protected String description;
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15 protected String name;
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16
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17 protected HashMap<Integer, SoftReference<Palette>> levels;
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18
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19 public PaletteManager() {
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20 }
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21
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22 public PaletteManager(
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23 String name,
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24 String description,
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25 Palette base
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26 ) {
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27 this.name = name;
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28 this.description = description;
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29 this.base = base;
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30 levels = new HashMap<Integer, SoftReference<Palette>>();
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31 }
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32
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33 public String getDescription() {
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34 return description;
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35 }
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36
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37 public String getName() {
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38 return name;
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39 }
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40
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41 public Palette getBase() {
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42 return base;
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43 }
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44
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45 public Palette getLevel(int n) {
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46 if (n < 2) {
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47 return base;
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48 }
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49
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50 Integer N = Integer.valueOf(n);
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51
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52 Palette palette;
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53
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54 synchronized (levels) {
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55 SoftReference<Palette> ref = levels.get(N);
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56
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57 if (ref != null && (palette = ref.get()) != null) {
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58 return palette;
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59 }
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60
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61 palette = base.subdivide(n);
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62
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63 ref = new SoftReference(palette);
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64
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65 levels.put(N, ref);
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66 }
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67
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68 return palette;
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69 }
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70 }
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71 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org