Application: gvSIG desktop » gvSIG raster

package org.gvsig.fmap.dal.file.jimi;

import java.io.IOException;

import java.nio.Buffer;

import java.nio.ByteBuffer;

import java.nio.DoubleBuffer;

import java.nio.FloatBuffer;

import java.nio.IntBuffer;

import java.nio.ShortBuffer;

import org.gvsig.raster.lib.buffer.api.BandInfo;

import org.gvsig.raster.lib.buffer.api.BandPageManager;

import org.gvsig.raster.lib.buffer.api.BufferLocator;

import org.gvsig.raster.lib.buffer.api.BufferManager;

/**

 * Band Page Managaer for a Memory Image

 * @author dmartinezizquierdo

 *

 */

public class MemoryImageBandPageManager implements BandPageManager{

    private MemoryImage image;

    private int band;

    private int dataSize = -1;

    private int dataType = BufferManager.TYPE_UNDEFINED;

    /**

     * @param image

     * @param band

     */

    public MemoryImageBandPageManager(MemoryImage image, int band){

        this.image=image;

        this.band=band;

    }

    @Override

    public boolean isSupportedSave() {

        return false;

    }

    @Override

    public void load(Buffer buffer, int firstRow, int numberRows, int dataType)

        throws IOException {

        int firstCell = firstRow * image.columns;

        int lastCell = firstCell + numberRows * image.columns;

        byte[] bandBuffer = image.buffer[band];

        dataSize = BufferLocator.getBufferManager().getDataTypeSize(dataType);

        int pageCell = 0;

        switch (dataType) {

        case BufferManager.TYPE_INT:

            for (int cell = firstCell; cell < lastCell; cell++) {

                ((IntBuffer) buffer).put(pageCell++, bandBuffer[cell*dataSize]);

            }

            break;

        case BufferManager.TYPE_BYTE:

            buffer.rewind();

            ((ByteBuffer) buffer).put(bandBuffer, firstCell * dataSize,

                numberRows * image.columns * dataSize);

            break;

        case BufferManager.TYPE_DOUBLE:

            for (int cell = firstCell; cell < lastCell; cell++) {

                ((DoubleBuffer) buffer).put(pageCell++, bandBuffer[cell*dataSize]);

            }

            break;

        case BufferManager.TYPE_FLOAT:

            for (int cell = firstCell; cell < lastCell; cell++) {

                ((FloatBuffer) buffer).put(pageCell++, bandBuffer[cell*dataSize]);

            }

            break;

        case BufferManager.TYPE_SHORT:

        case BufferManager.TYPE_USHORT:

            for (int cell = firstCell; cell < lastCell; cell++) {

                ((ShortBuffer) buffer).put(pageCell++, bandBuffer[cell*dataSize]);

            }

            break;

        }

    }

    @Override

    public void save(Buffer buffer, int row, int rows, int dataType)

        throws IOException {

        throw new UnsupportedOperationException();

    }

    @Override

    public BandInfo getBandInfo(int band) {

        return null;

    }

}