//
//  ========================================================================
//  Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.http2.frames;

import java.nio.ByteBuffer;

public class DataFrame extends StreamFrame
{
    private final ByteBuffer data;
    private final boolean endStream;
    private final int padding;

    public DataFrame(ByteBuffer data, boolean endStream)
    {
        this(0, data, endStream);
    }

    public DataFrame(int streamId, ByteBuffer data, boolean endStream)
    {
        this(streamId, data, endStream, 0);
    }

    public DataFrame(int streamId, ByteBuffer data, boolean endStream, int padding)
    {
        super(FrameType.DATA, streamId);
        this.data = data;
        this.endStream = endStream;
        this.padding = padding;
    }

    public ByteBuffer getData()
    {
        return data;
    }

    public boolean isEndStream()
    {
        return endStream;
    }

    /**
     * @return the number of data bytes remaining.
     */
    public int remaining()
    {
        return data.remaining();
    }

    /**
     * @return the number of bytes used for padding that count towards flow control.
     */
    public int padding()
    {
        return padding;
    }

    @Override
    public DataFrame withStreamId(int streamId)
    {
        return new DataFrame(streamId, getData(), isEndStream());
    }

    @Override
    public String toString()
    {
        return String.format("%s#%d{length:%d,end=%b}", super.toString(), getStreamId(), data.remaining(), endStream);
    }
}
