/*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2007 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package omero.gateway.rnd;
import omero.util.ReadOnlyByteArray;
/**
* Converts the values.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @version 3.0
* @since OME3.0
*/
abstract class BytesConverter
{
/**
* Factory method to return an appropriate converter, depending on the pixel
* type.
*
* @param pixelsType The pixels type.
* @return A suitable converter.
*/
static BytesConverter getConverter(String pixelsType)
{
if (DataSink.UINT_8.equals(pixelsType) ||
DataSink.UINT_16.equals(pixelsType) ||
DataSink.UINT_32.equals(pixelsType))
return new UintConverter();
else if (DataSink.INT_8.equals(pixelsType) ||
DataSink.INT_16.equals(pixelsType) ||
DataSink.INT_32.equals(pixelsType))
return new IntConverter();
else if (DataSink.FLOAT.equals(pixelsType))
return new FloatConverter();
else if (DataSink.DOUBLE.equals(pixelsType))
return new DoubleConverter();
return null;
}
/**
* Converts a sequence of bytes, representing a pixel value, into a numeric
* value of appropriate type, taking endianness into account.
* The value returned by this method is a <code>double</code>.
*
* @param data The byte array containing the bytes to convert.
* @param offset The position of the first byte making up the pixel value.
* @param length The number of bytes that make up the pixel value.
* @return An object to wrap the actual numeric value.
*/
public abstract double pack(ReadOnlyByteArray data, int offset, int length);
}