001/*
002 * $RCSfile: ImageInputStreamWrapper.java,v $
003 *
004 * 
005 * Copyright (c) 2005 Sun Microsystems, Inc. All  Rights Reserved.
006 * 
007 * Redistribution and use in source and binary forms, with or without
008 * modification, are permitted provided that the following conditions
009 * are met: 
010 * 
011 * - Redistribution of source code must retain the above copyright 
012 *   notice, this  list of conditions and the following disclaimer.
013 * 
014 * - Redistribution in binary form must reproduce the above copyright
015 *   notice, this list of conditions and the following disclaimer in 
016 *   the documentation and/or other materials provided with the
017 *   distribution.
018 * 
019 * Neither the name of Sun Microsystems, Inc. or the names of 
020 * contributors may be used to endorse or promote products derived 
021 * from this software without specific prior written permission.
022 * 
023 * This software is provided "AS IS," without a warranty of any 
024 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
025 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
026 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL 
028 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF 
029 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR 
031 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035 * POSSIBILITY OF SUCH DAMAGES. 
036 * 
037 * You acknowledge that this software is not designed or intended for 
038 * use in the design, construction, operation or maintenance of any 
039 * nuclear facility. 
040 *
041 * $Revision: 1.1 $
042 * $Date: 2005/02/11 05:01:32 $
043 * $State: Exp $
044 */
045package com.sun.media.imageioimpl.plugins.jpeg2000;
046
047import java.io.InputStream;
048import java.io.IOException;
049import javax.imageio.stream.ImageInputStream;
050
051/**
052 * This class is designed to wrap a <code>ImageInputStream</codem> into
053 *  a <code>InputStream</code>.  The reason is that <code>ImageInputStream</code>
054 *  implements <code>DataInput</code> but doesn't extend
055 *  <code>InputStream</code>.  However, the JJ2000 JPEG 2000 packages accepts
056 *  a <code>InputStream</code> when reads a JPEG 2000 image file.
057 */
058public class ImageInputStreamWrapper extends InputStream {
059
060    /** The <code>ImageInputStream</code> to be wrapped. */
061    private ImageInputStream src;
062
063    /** Constructs an <code>ImageInputStreamWrapper</code> from the provided
064     *  <code>ImageInputStream</code>.
065     *
066     *  @param src The <code>ImageInputStream</code> to be wrapped.
067     */
068    public ImageInputStreamWrapper(ImageInputStream src) {
069        this.src = src;
070    }
071
072    // Override the methods defined in <code>InputStream</code>
073    public int read() throws IOException {
074        return src.read();
075    }
076
077    public void close() throws IOException {
078        src.close();
079    }
080
081    public synchronized void mark(int readlimit) {
082        src.mark();
083    }
084
085    public boolean markSupported() {
086        return true;
087    }
088
089    public int read(byte b[]) throws IOException {
090        return src.read(b, 0, b.length);
091    }
092
093    public int read(byte b[], int off, int len) throws IOException {
094        return src.read(b, off, len);
095    }
096
097    public synchronized void reset() throws IOException {
098        src.reset();
099    }
100
101    public long skip(long n) throws IOException {
102        return src.skipBytes(n);
103    }
104}