fine-third/fine-jai/src/main/java/com/fr/third/JAI/SeekableOutputStream.java

/*
 * Copyright (c) 2001 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:
 * 
 * -Redistributions of source code must retain the above copyright notice, this 
 * list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduct 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 AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE 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 SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that Software is not designed,licensed or intended for use in 
 * the design, construction, operation or maintenance of any nuclear facility.
 */
package com.fr.third.JAI;
import java.io.IOException;
import java.io.OutputStream;
import java.io.RandomAccessFile;

/**
 * An <code>OutputStream</code> which can seek to an arbitrary offset.
 */
public class SeekableOutputStream extends OutputStream {

    private RandomAccessFile file;

    /**
     * Constructs a <code>SeekableOutputStream</code> from a
     * <code>RandomAccessFile</code>.  Unless otherwise indicated,
     * all method invocations are fowarded to the underlying
     * <code>RandomAccessFile</code>.
     *
     * @param file The <code>RandomAccessFile</code> to which calls
     *             will be forwarded.
     * @exception IllegalArgumentException if <code>file</code> is
     *            <code>null</code>.
     */
    public SeekableOutputStream(RandomAccessFile file) {
        if(file == null) {
            throw new IllegalArgumentException(JaiI18N.getString("SeekableOutputStream0"));
        }
        this.file = file;
    }

    public void write(int b) throws IOException {
        file.write(b);
    }

    public void write(byte b[]) throws IOException {
        file.write(b);
    }

    public void write(byte b[], int off, int len) throws IOException {
        file.write(b, off, len);
    }

    /**
     * Invokes <code>getFD().sync()</code> on the underlying
     * <code>RandomAccessFile</code>.
     */
    public void flush() throws IOException {
        file.getFD().sync();
    }

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

    public long getFilePointer() throws IOException {
        return file.getFilePointer();
    }

    public void seek(long pos) throws IOException {
        file.seek(pos);
    }
}