Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/raster/PaletteManager.java @ 1037:da4306683186
Added queries for TimeSeriesPoints in vectorvalues for TimeSeries
gnv-artifacts/trunk@1109 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Tim Englich <tim.englich@intevation.de> |
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date | Tue, 18 May 2010 14:27:46 +0000 |
parents | d766fe2d917a |
children | f953c9a559d8 |
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package de.intevation.gnv.raster; import java.lang.ref.SoftReference; import java.util.HashMap; /** * Manages palettes by their name. Provides different levels of * subdivisions. * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> */ public class PaletteManager { /** * The base palette. */ protected Palette base; /** * The description of the palette. */ protected String description; /** * The name of the palette. */ protected String name; /** * Already created subdivisions of the palette. */ protected HashMap<Integer, SoftReference<Palette>> levels; /** * Default constructor. */ public PaletteManager() { } /** * Constructor to create a palette manager with a given name, * description and base palette. * @param name The name. * @param description The description. * @param base The base palette. */ public PaletteManager( String name, String description, Palette base ) { this.name = name; this.description = description; this.base = base; levels = new HashMap<Integer, SoftReference<Palette>>(); } /** * Returns the description of the palette. * @return The description. */ public String getDescription() { return description; } /** * The name of the palette. * @return The name. */ public String getName() { return name; } /** * Returns the base palette. * @return The base palette. */ public Palette getBase() { return base; } /** * Returns the subdivided palette of a given level. * @param n The level of subdivision. * @return The subdivided palette. */ public Palette getLevel(int n) { if (n < 2) { return base; } Integer N = Integer.valueOf(n); Palette palette; synchronized (levels) { SoftReference<Palette> ref = levels.get(N); if (ref != null && (palette = ref.get()) != null) { return palette; } palette = base.subdivide(n); ref = new SoftReference(palette); levels.put(N, ref); } return palette; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :