/* * 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(); } } }