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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/* Licence:
*   Use this however/wherever you like, just don't blame me if it breaks anything.
*
* Credit:
*   If you're nice, you'll leave this bit:
*
*   Class by Pierre-Alexandre Losson -- http://www.telio.be/blog
*   email : [email protected]
*/
package io.milton.servlet.upload;

import java.io.IOException;
import java.io.OutputStream;

public class MonitoredOutputStream extends OutputStream
{
    private final OutputStream target;
    private final OutputStreamListener listener;

    public MonitoredOutputStream(OutputStream target, OutputStreamListener listener)
    {
        this.target = target;
        this.listener = listener;
        this.listener.start();
    }

    public void write(byte[] b, int off, int len) throws IOException
    {
        target.write(b,off,len);
        listener.bytesRead(len - off);
    }

    public void write(byte[] b) throws IOException
    {
        target.write(b);
        listener.bytesRead(b.length);
    }

    public void write(int b) throws IOException
    {
        target.write(b);
        listener.bytesRead(1);
    }

    public void close() throws IOException
    {
        target.close();
        listener.done();
    }

    public void flush() throws IOException
    {
        target.flush();
    }
}