root / trunk / libraries / libRaster / src / org / gvsig / raster / dataaccess / cache / PageBandBuffer.java @ 11072
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1 | 10740 | nacho | |
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2 | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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3 | *
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4 | * Copyright (C) 2006 IVER T.I. and Generalitat Valenciana.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 2
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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19 | */
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20 | package org.gvsig.raster.dataaccess.cache; |
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21 | |||
22 | import java.io.IOException; |
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23 | |||
24 | import org.gvsig.raster.dataaccess.buffer.RasterMemoryBuffer; |
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25 | |||
26 | /**
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27 | * Esta clase representa una p?gina de cache. Una p?gina no es m?s que un buffer de datos
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28 | * con todas sus funcionalidades con un uso especifico, el de ser una p?gina.
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29 | *
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30 | * @author Nacho Brodin (nachobrodin@gmail.com)
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31 | *
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32 | */
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33 | public class PageBandBuffer extends RasterMemoryBuffer{ |
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34 | |||
35 | /**
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36 | * N?mero de banda que corresponde a este PageBandBuffer
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37 | */
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38 | private int numBand = 0; |
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39 | private HddPage[] hddPages = null; |
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40 | |||
41 | /**
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42 | * Constructor.
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43 | * @param dataType Tipo de dato
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44 | * @param width Ancho de p?gina
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45 | * @param height Alto de p?gina
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46 | * @param bandNr N?mero de bandas
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47 | * @param malloc true para reservar de memoria en el buffer
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48 | */
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49 | public PageBandBuffer(int dataType, int width, int height, int bandNr, boolean malloc, int numBand){ |
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50 | super(dataType, width, height, bandNr, malloc);
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51 | this.numBand = numBand;
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52 | } |
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53 | |||
54 | /**
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55 | * Asigna la lista de paginas de disco
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56 | * @param hddList Lista de p?ginas de disco
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57 | */
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58 | public void setHddPages(HddPage[] hddList){ |
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59 | this.hddPages = hddList;
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60 | } |
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61 | |||
62 | /**
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63 | * Carga una p?gina especificada en el par?metro nPag con los datos necesarios.
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64 | * Para esto utiliza el dataSource.
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65 | *
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66 | * @param nPag N?mero de p?gina a cargar
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67 | */
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68 | public void loadPage(int nPag){ |
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69 | hddPages[nPag].getDataServer(numBand).loadPage(this);
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70 | } |
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71 | |||
72 | /**
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73 | * Salva una p?gina especificada en el par?metro nPag a disco.
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74 | * Para esto utiliza el dataSource
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75 | *
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76 | * @param nPag N?mero de p?gina a salvar
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77 | * @throws IOException
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78 | */
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79 | public void savePage(int nPag) throws IOException{ |
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80 | hddPages[nPag].getDataServer(numBand).savePage(this);
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81 | } |
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82 | |||
83 | } |