| /* FileCacheImageInputStream.java -- |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.imageio.stream; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * @author Michael Koch (konqueror@gmx.de) |
| */ |
| public class FileCacheImageInputStream extends ImageInputStreamImpl |
| { |
| private InputStream stream; |
| private File cacheDir; |
| |
| public FileCacheImageInputStream(InputStream stream, File cacheDir) |
| throws IOException |
| { |
| super(); |
| this.stream = stream; |
| // FIXME: We do not support caching yet. |
| this.cacheDir = cacheDir; |
| } |
| |
| public void close() |
| throws IOException |
| { |
| if (stream != null) |
| { |
| stream.close(); |
| stream = null; |
| } |
| } |
| |
| private void checkStreamClosed() |
| throws IOException |
| { |
| if (stream == null) |
| throw new IOException("stream closed"); |
| } |
| |
| public boolean isCached() |
| { |
| return true; |
| } |
| |
| public boolean isCachedFile() |
| { |
| return true; |
| } |
| |
| public boolean isCachedMemory() |
| { |
| return false; |
| } |
| |
| public int read() |
| throws IOException |
| { |
| checkStreamClosed(); |
| setBitOffset(0); |
| return stream.read(); |
| } |
| |
| public int read(byte[] data, int offset, int len) |
| throws IOException |
| { |
| checkStreamClosed(); |
| setBitOffset(0); |
| return stream.read(data, offset, len); |
| } |
| } |