gvsig-raster / org.gvsig.raster.cache / trunk / org.gvsig.raster.cache / org.gvsig.raster.cache.lib.impl / src / main / java / org / gvsig / raster / cache / buffer / impl / BufferCacheManagerImpl.java @ 1001
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package org.gvsig.raster.cache.buffer.impl; |
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import java.io.IOException; |
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import org.gvsig.raster.cache.buffer.Buffer; |
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import org.gvsig.raster.cache.buffer.BufferCacheManager; |
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import org.gvsig.raster.cache.buffer.BufferDataSource; |
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import org.gvsig.raster.cache.buffer.BufferInterpolation; |
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import org.gvsig.raster.cache.buffer.BufferParam; |
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import org.gvsig.raster.cache.buffer.BufferNoData; |
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import org.gvsig.raster.cache.buffer.histogram.BufferHistogram; |
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import org.gvsig.raster.cache.buffer.impl.datastruct.DefaultNoData; |
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import org.gvsig.raster.cache.buffer.impl.histogram.BufferHistogramImpl; |
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import org.gvsig.raster.cache.buffer.impl.io.BufferDataSourceImpl; |
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import org.gvsig.raster.cache.buffer.impl.memory.RasterMemoryBuffer; |
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import org.gvsig.raster.cache.buffer.impl.rocache.RasterReadOnlyBuffer; |
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import org.gvsig.raster.cache.buffer.impl.stripecache.horizontal.RasterCacheBuffer; |
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import org.gvsig.raster.cache.buffer.impl.stripecache.vertical.RasterVertCacheBuffer; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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public class BufferCacheManagerImpl implements BufferCacheManager { |
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private static final Logger logger = LoggerFactory.getLogger(BufferCacheManagerImpl.class); |
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/**
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* This variable represents which buffer is going to be used. By default has a
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* DONT_FORCE value. That means that the algorithm to select the type of buffer
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* is applied. The other types of constants force the use of a kind of buffer.
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*/
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public static int forceBuffer = DONT_FORCE; |
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/**
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* Tama?o aproximado de cach? en Megas. Si este valor es alto cabr?n muchas p?ginas en memoria
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* a la vez y si es bajo cabr?n pocas. Hay que tener en cuenta que al instanciar se convertira en bytes
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* para su mejor tratamiento. Al llamar al constructor esta variable contendr? el tama?o exacto
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* de la cache en bytes. El tama?o aqu? especificado es aproximado. Este variar? dependiendo de los
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* par?metros del raster a cachear ya que las p?ginas deben tener una altura potencia de 2.
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*/
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public static long cacheSize = 25; |
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/**
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* Tama?o m?ximo de la p?gina en Megas. Hay que tener en cuenta que al instanciar se convertira en bytes
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* para su mejor tratamiento. Al llamar al constructor esta variable contendr? el tama?o exacto
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* de la p?gina en bytes
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*/
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public static double pageSize = 4; |
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/**
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* N?mero de p?ginas que tiene cada conjunto de cach?
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*/
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public static int pagsPerGroup = 5; |
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/**
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* En la generaci?n autom?tica de clases esta variable representa el n?mero de
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* clases en las que se hace la divisi?n.
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*/
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public static int defaultNumberOfClasses = 64; |
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/**
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* Genera instancias del buffer de datos adecuado al tama?o del raster. Si no hay muchos datos
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* (menos de cacheMemorySize) crear? un buffer en memoria. Si hay m?s de esta cantidad
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* entonces crearemos un buffer cacheado (RasterCache). A partir de la cantidad se?alada
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* por multicacheMemorySize haremos un buffer cacheado donde cada p?gina no ocupa todo
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* el ancho del raster ya que este ser? muy grande. La gesti?n de una cache donde cada
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* pagina ha de partir una l?nea lleva una complejidad a?adida.
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*
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* @param params Par?metros de la carga
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* @return Objeto RasterBuffer
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*/
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public Buffer createBuffer(BufferParam params) { |
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//Opci?n de cachear siempre activada (Solo DEBUG)
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if(forceBuffer == BufferCacheManager.BAND_CACHE)
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return new RasterCacheBuffer(params.getDataType(), |
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(int)params.getWidth(),
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(int)params.getHeight(),
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params.getBandCount()); |
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if(forceBuffer == BufferCacheManager.BAND_VERT_CACHE)
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return new RasterVertCacheBuffer(params.getDataType(), |
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(int)params.getWidth(),
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(int)params.getHeight(),
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params.getBandCount()); |
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if (forceBuffer == BufferCacheManager.READ_ONLY_CACHE)
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return new RasterReadOnlyBuffer(params.getDataSource(), |
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params.getX(), |
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params.getY(), |
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params.getWidth(), |
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params.getHeight(), |
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params.getBandList()); |
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if (forceBuffer == BufferCacheManager.MEMORY_BUFFER) {
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RasterMemoryBuffer b = new RasterMemoryBuffer(params.getDataType(),
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(int)params.getWidth(),
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(int)params.getHeight(),
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params.getBandCount(), |
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true);
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try {
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//Para el buffer en memoria ya no necesitamos el proveedor de datos
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if(params.getDataSource() != null) |
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params.getDataSource().close(); |
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} catch (IOException e) { |
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logger.debug("I can't close the dataset", b, e);
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} |
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return b;
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} |
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if(forceBuffer == BufferCacheManager.DONT_FORCE) {
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if(params.getAccessType() == RasterBuffer.READ_ONLY)
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return new RasterReadOnlyBuffer(params.getDataSource(), |
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params.getX(), |
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params.getY(), |
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params.getWidth(), |
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params.getHeight(), |
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params.getBandList()); |
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if(params.getAccessType() == RasterBuffer.READ_WRITE || params.getAccessType() == RasterBuffer.READ_WRITE_CVERT) {
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long size = (RasterBuffer.getBytesFromRasterBufType((int)params.getDataType()) * (int)params.getWidth() * (int)params.getHeight() * (int)params.getBandCount()) / 1024; |
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long ms1 = BufferCacheManagerImpl.cacheSize * 1024; |
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if(size <= ms1) {
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RasterMemoryBuffer b = new RasterMemoryBuffer(params.getDataType(),
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(int)params.getWidth(),
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(int)params.getHeight(),
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params.getBandCount(), |
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true);
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try {
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//Para el buffer en memoria ya no necesitamos el proveedor de datos
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if(params.getDataSource() != null) |
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params.getDataSource().close(); |
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} catch (IOException e) { |
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logger.debug("I can't close the dataset", b, e);
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} |
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return b;
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} else {
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if(params.getAccessType() == RasterBuffer.READ_WRITE) {
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return new RasterCacheBuffer(params.getDataType(), |
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(int)params.getWidth(),
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(int)params.getHeight(),
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params.getBandCount()); |
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} |
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if(params.getAccessType() == RasterBuffer.READ_WRITE_CVERT) {
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return new RasterVertCacheBuffer(params.getDataType(), |
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(int)params.getWidth(),
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(int)params.getHeight(),
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params.getBandCount()); |
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} |
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} |
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} |
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} |
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return null; |
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} |
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/**
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* Genera una instancia del buffer de solo lectura. Este buffer consta de una cache y unos apuntadores
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* a las p?ginas en disco. Cuando se accede a los datos se carga en memoria la p?gina pedida.
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*
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* @param file
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* File to read data
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*/
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public Buffer createReadOnlyBuffer(String file) { |
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BufferDataSource ds = null;
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try {
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ds = new BufferDataSourceImpl(file);
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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return new RasterReadOnlyBuffer(ds); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createMemoryBuffer(org.gvsig.raster.cache.buffer.BufferParam)
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*/
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public Buffer createMemoryBuffer(BufferParam params) { |
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return new RasterMemoryBuffer(params.getDataType(), |
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(int)params.getWidth(),
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(int)params.getHeight(),
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params.getBandCount(), |
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true);
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createMemoryBuffer(int, int, int, int, boolean)
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*/
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public Buffer createMemoryBuffer(int dataType, int width, int height, int bandNr, boolean malloc) { |
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return new RasterMemoryBuffer(dataType, width, height, bandNr, malloc); |
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} |
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/**
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* Creates a new instance of an interpolation object.
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* @param buf IRasterBuffer
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* @return IBufferInterpolation
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*/
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public BufferInterpolation createInterpolation(Buffer buf) { |
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return new BufferInterpolationImpl(buf); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createBufferParams(int, int, int, int)
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*/
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public BufferParam createBufferParams(int w, int h, int bandCount, int dataType) { |
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return new BufferParamImpl(w, h, bandCount, dataType); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createBufferParams(int, int)
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*/
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public BufferParam createBufferParams(int w, int h) { |
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return new BufferParamImpl(w, h); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createBufferParams(java.lang.String, int, int, int, int)
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*/
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public BufferParam createBufferParams(String file, int x, int y, int w, int h, int[] bands) throws IOException { |
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return new BufferParamImpl(file, x, y, w, h, bands); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createBufferParams(java.lang.String, int, int, int, int)
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*/
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public BufferParam createBufferParams(String file, int x, int y, int w, int h) throws IOException { |
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return new BufferParamImpl(file, x, y, w, h, null); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createBufferParams(java.lang.String[], int, int, int, int, int[])
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*/
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public BufferParam createBufferParams(String[] files, int x, int y, int w, int h, int[] bands) throws IOException { |
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return new BufferParamImpl(files, x, y, w, h, bands); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createNoData(java.lang.Number, java.lang.Number, java.lang.String, int)
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*/
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public BufferNoData createNoData(Number noData, Number nativeNoData, String fileName, int bandCount) { |
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return new DefaultNoData(noData, nativeNoData, fileName, bandCount); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createNoData(java.lang.Number, java.lang.Number, java.lang.String)
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*/
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public BufferNoData createNoData(Number noData, Number nativeNoData, String fileName) { |
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return new DefaultNoData(noData, nativeNoData, fileName); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.cache.buffer.BufferCacheManager#createDefaultNoData(int, int)
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*/
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public BufferNoData createDefaultNoData(int bandCount, int dataType) { |
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switch (dataType) {
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case Buffer.TYPE_BYTE: |
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return new DefaultNoData(new Byte(BufferNoData.defaultByteNoDataValue), new Byte(BufferNoData.defaultByteNoDataValue), null); |
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case Buffer.TYPE_SHORT: |
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return new DefaultNoData(new Short(BufferNoData.defaultShortNoDataValue), new Short(BufferNoData.defaultShortNoDataValue), null); |
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case Buffer.TYPE_INT: |
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return new DefaultNoData(new Integer(BufferNoData.defaultIntegerNoDataValue), new Integer(BufferNoData.defaultIntegerNoDataValue), null); |
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case Buffer.TYPE_FLOAT: |
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return new DefaultNoData(new Float(BufferNoData.defaultFloatNoDataValue), new Float(BufferNoData.defaultFloatNoDataValue), null); |
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case Buffer.TYPE_DOUBLE: |
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return new DefaultNoData(new Double(BufferNoData.defaultDoubleNoDataValue), new Double(BufferNoData.defaultDoubleNoDataValue), null); |
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} |
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return null; |
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} |
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public BufferHistogram createHistogram(int nBands, double[] min, double[] max, int dataType, int numberOfClasses) { |
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return new BufferHistogramImpl(nBands, min, max, dataType, numberOfClasses); |
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} |
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public BufferHistogram createHistogram(int nBands, int nClasses, double[] min, double[] max) { |
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return new BufferHistogramImpl(nBands, nClasses, min, max); |
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} |
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} |