/*
* Copyright (C) 2010 Brockmann Consult GmbH (info@brockmann-consult.de)
*
* 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 3 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, see http://www.gnu.org/licenses/
*/
package com.bc.ceres.binio.util;
import com.bc.ceres.binio.DataContext;
import com.bc.ceres.binio.IOHandler;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import java.io.IOException;
public class ImageIOHandler implements IOHandler {
private final ImageInputStream imageInputStream;
private final ImageOutputStream imageOutputStream;
public ImageIOHandler(ImageInputStream imageInputStream) {
this.imageInputStream = imageInputStream;
this.imageOutputStream = null;
}
public ImageIOHandler(ImageOutputStream imageOutputStream) {
this.imageInputStream = imageOutputStream;
this.imageOutputStream = imageOutputStream;
}
@Override
public void read(DataContext context, byte[] data, long position) throws IOException {
synchronized (imageInputStream) {
imageInputStream.seek(position);
imageInputStream.readFully(data, 0, data.length);
}
}
@Override
public void write(DataContext context, byte[] data, long position) throws IOException {
if (imageOutputStream == null) {
throw new IOException("Read only.");
}
synchronized (imageOutputStream) {
imageOutputStream.seek(position);
imageOutputStream.write(data);
}
}
@Override
public long getMaxPosition() throws IOException {
synchronized (imageOutputStream) {
return imageInputStream.length();
}
}
}