/*

 * 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

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 */

package jdk.incubator.http.internal.frame;

import java.nio.ByteBuffer;

import java.util.List;

public class HeadersFrame extends HeaderFrame {

    public static final int TYPE = 0x1;

    // Flags

    public static final int END_STREAM = 0x1;

    public static final int PADDED = 0x8;

    public static final int PRIORITY = 0x20;

    private int padLength;

    private int streamDependency;

    private int weight;

    private boolean exclusive;

    public HeadersFrame(int streamid, int flags, List<ByteBuffer> headerBlocks, int padLength) {

        super(streamid, flags, headerBlocks);

        if (padLength > 0) {

            setPadLength(padLength);

        }

    }

    public HeadersFrame(int streamid, int flags, List<ByteBuffer> headerBlocks) {

        super(streamid, flags, headerBlocks);

    }

    public HeadersFrame(int streamid, int flags, ByteBuffer headerBlock) {

        this(streamid, flags, List.of(headerBlock));

    }

    @Override

    public int type() {

        return TYPE;

    }

    @Override

    int length() {

        return headerLength

                + ((flags & PADDED) != 0 ? (1 + padLength) : 0)

                + ((flags & PRIORITY) != 0 ? 5 : 0);

    }

    @Override

    public String flagAsString(int flag) {

        switch (flag) {

            case END_STREAM:

                return "END_STREAM";

            case PADDED:

                return "PADDED";

            case PRIORITY:

                return "PRIORITY";

        }

        return super.flagAsString(flag);

    }

    public void setPadLength(int padLength) {

        this.padLength = padLength;

        flags |= PADDED;

    }

    int getPadLength() {

        return padLength;

    }

    public void setPriority(int streamDependency, boolean exclusive, int weight) {

        this.streamDependency = streamDependency;

        this.exclusive = exclusive;

        this.weight = weight;

        this.flags |= PRIORITY;

    }

    public int getStreamDependency() {

        return streamDependency;

    }

    public int getWeight() {

        return weight;

    }

    public boolean getExclusive() {

        return exclusive;

    }

}