Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/PaletteManager.java @ 1142:12abbf15f18a
dummy merge for repo head
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Sep 2012 12:15:20 +0200 |
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1 /* |
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2 * Copyright (c) 2010 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 |
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9 package de.intevation.gnv.raster; |
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10 |
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11 import java.lang.ref.SoftReference; |
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12 |
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13 import java.util.HashMap; |
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14 |
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15 /** |
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16 * Manages palettes by their name. Provides different levels of |
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17 * subdivisions. |
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18 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> |
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19 */ |
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20 public class PaletteManager |
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21 { |
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22 /** |
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23 * The base palette. |
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24 */ |
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25 protected Palette base; |
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26 |
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27 /** |
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28 * The description of the palette. |
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29 */ |
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30 protected String description; |
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31 |
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32 /** |
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33 * The name of the palette. |
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34 */ |
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35 protected String name; |
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36 |
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37 /** |
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38 * Already created subdivisions of the palette. |
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39 */ |
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40 protected HashMap<Integer, SoftReference<Palette>> levels; |
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41 |
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42 /** |
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43 * Default constructor. |
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44 */ |
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45 public PaletteManager() { |
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46 } |
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47 |
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48 /** |
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49 * Constructor to create a palette manager with a given name, |
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50 * description and base palette. |
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51 * @param name The name. |
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52 * @param description The description. |
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53 * @param base The base palette. |
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54 */ |
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55 public PaletteManager( |
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56 String name, |
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57 String description, |
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58 Palette base |
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59 ) { |
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60 this.name = name; |
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61 this.description = description; |
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62 this.base = base; |
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63 levels = new HashMap<Integer, SoftReference<Palette>>(); |
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64 } |
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65 |
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66 /** |
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67 * Returns the description of the palette. |
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68 * @return The description. |
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69 */ |
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70 public String getDescription() { |
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71 return description; |
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72 } |
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73 |
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74 /** |
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75 * The name of the palette. |
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76 * @return The name. |
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77 */ |
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78 public String getName() { |
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79 return name; |
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80 } |
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81 |
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82 /** |
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83 * Returns the base palette. |
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84 * @return The base palette. |
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85 */ |
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86 public Palette getBase() { |
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87 return base; |
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88 } |
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89 |
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90 /** |
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91 * Returns the subdivided palette of a given level. |
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92 * @param n The level of subdivision. |
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93 * @return The subdivided palette. |
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94 */ |
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95 public Palette getLevel(int n) { |
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96 if (n < 2) { |
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97 return base; |
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98 } |
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99 |
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100 Integer N = Integer.valueOf(n); |
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101 |
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102 Palette palette; |
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103 |
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104 synchronized (levels) { |
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105 SoftReference<Palette> ref = levels.get(N); |
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106 |
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107 if (ref != null && (palette = ref.get()) != null) { |
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108 return palette; |
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109 } |
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110 |
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111 palette = base.subdivide(n); |
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112 |
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113 ref = new SoftReference(palette); |
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114 |
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115 levels.put(N, ref); |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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116 } |
7399bb8f83ea
Added manager to handle several levels of palette subdivsions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
117 |
7399bb8f83ea
Added manager to handle several levels of palette subdivsions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
118 return palette; |
7399bb8f83ea
Added manager to handle several levels of palette subdivsions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
119 } |
7399bb8f83ea
Added manager to handle several levels of palette subdivsions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
120 } |
798
6cff63d0c434
Fixed vim modeline. Added some Javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
780
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changeset
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121 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |