/*

 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.internal.net.http.frame;

import java.nio.ByteBuffer;

import java.util.List;

public class PushPromiseFrame extends HeaderFrame {

    private int padLength;

    private final int promisedStream;

    public static final int TYPE = 0x5;

    // Flags

    public static final int END_HEADERS = 0x4;

    public static final int PADDED = 0x8;

    public PushPromiseFrame(int streamid, int flags, int promisedStream, List<ByteBuffer> buffers, int padLength) {

        super(streamid, flags, buffers);

        this.promisedStream = promisedStream;

        if(padLength > 0 ) {

            setPadLength(padLength);

        }

    }

    @Override

    public int type() {

        return TYPE;

    }

    @Override

    int length() {

        return headerLength + ((flags & PADDED) != 0 ? 5 : 4);

    }

    @Override

    public String toString() {

        return super.toString() + " promisedStreamid: " + promisedStream

                + " headerLength: " + headerLength;

    }

    @Override

    public String flagAsString(int flag) {

        switch (flag) {

            case PADDED:

                return "PADDED";

            case END_HEADERS:

                return "END_HEADERS";

        }

        return super.flagAsString(flag);

    }

    public void setPadLength(int padLength) {

        this.padLength = padLength;

        flags |= PADDED;

    }

    public int getPadLength() {

        return padLength;

    }

    public int getPromisedStream() {

        return promisedStream;

    }

    @Override

    public boolean endHeaders() {

        return getFlag(END_HEADERS);

    }

}