1 /*

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

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

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

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

    25 

    26 package java.net.http.internal.frame;

    27 

    28 import java.net.http.internal.common.Utils;

    29 

    30 import java.nio.ByteBuffer;

    31 import java.util.List;

    32 

    33 /**

    34  * Either a HeadersFrame or a ContinuationFrame

    35  */

    36 public abstract class HeaderFrame extends Http2Frame {

    37 

    38     final int headerLength;

    39     final List<ByteBuffer> headerBlocks;

    40 

    41     public static final int END_STREAM = 0x1;

    42     public static final int END_HEADERS = 0x4;

    43 

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

    45         super(streamid, flags);

    46         this.headerBlocks = headerBlocks;

    47         this.headerLength = Utils.remaining(headerBlocks, Integer.MAX_VALUE);

    48     }

    49 

    50     @Override

    51     public String flagAsString(int flag) {

    52         switch (flag) {

    53             case END_HEADERS:

    54                 return "END_HEADERS";

    55             case END_STREAM:

    56                 return "END_STREAM";

    57         }

    58         return super.flagAsString(flag);

    59     }

    60 

    61 

    62     public List<ByteBuffer> getHeaderBlock() {

    63         return headerBlocks;

    64     }

    65 

    66     int getHeaderLength() {

    67         return headerLength;

    68     }

    69 

    70     /**

    71      * Returns true if this block is the final block of headers.

    72      */

    73     public boolean endHeaders() {

    74         return getFlag(END_HEADERS);

    75     }

    76 }