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• ImageInputStreamWrapper.java

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/*
 * $RCSfile: ImageInputStreamWrapper.java,v $
 *
 * 
 * Copyright (c) 2005 Sun Microsystems, Inc. All  Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met: 
 * 
 * - Redistribution of source code must retain the above copyright 
 *   notice, this  list of conditions and the following disclaimer.
 * 
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in 
 *   the documentation and/or other materials provided with the
 *   distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of 
 * contributors may be used to endorse or promote products derived 
 * from this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any 
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL 
 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF 
 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR 
 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES. 
 * 
 * You acknowledge that this software is not designed or intended for 
 * use in the design, construction, operation or maintenance of any 
 * nuclear facility. 
 *
 * $Revision: 1.1 $
 * $Date: 2005/02/11 05:01:32 $
 * $State: Exp $
 */
package com.github.jaiimageio.jpeg2000.impl;

import java.io.IOException;
import java.io.InputStream;

import javax.imageio.stream.ImageInputStream;

/**
 * This class is designed to wrap a ImageInputStream into
 *  a InputStream.  The reason is that ImageInputStream
 *  implements DataInput but doesn't extend
 *  InputStream.  However, the JJ2000 JPEG 2000 packages accepts
 *  a InputStream when reads a JPEG 2000 image file.
 */
public class ImageInputStreamWrapper extends InputStream {

    /** The ImageInputStream to be wrapped. */
    private ImageInputStream src;

    /** Constructs an ImageInputStreamWrapper from the provided
     *  ImageInputStream.
     *
     *  @param src The ImageInputStream to be wrapped.
     */
    public ImageInputStreamWrapper(ImageInputStream src) {
        this.src = src;
    }

    // Override the methods defined in InputStream
    public int read() throws IOException {
        return src.read();
    }

    public void close() throws IOException {
        src.close();
    }

    public synchronized void mark(int readlimit) {
        src.mark();
    }

    public boolean markSupported() {
	return true;
    }

    public int read(byte b[]) throws IOException {
	return src.read(b, 0, b.length);
    }

    public int read(byte b[], int off, int len) throws IOException {
        return src.read(b, off, len);
    }

    public synchronized void reset() throws IOException {
	src.reset();
    }

    public long skip(long n) throws IOException {
        return src.skipBytes(n);
    }
}