1 /*

     2  * Copyright (c) 2015, 2016, 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;

    27 

    28 import java.nio.ByteBuffer;

    29 

    30 /**

    31  * Either a HeadersFrame or a ContinuationFrame

    32  */

    33 abstract class HeaderFrame extends Http2Frame {

    34 

    35     int offset;

    36     int number;

    37     int headerLength;

    38     ByteBuffer[] headerBlocks;

    39 

    40     public static final int END_HEADERS = 0x4;

    41 

    42     @Override

    43     String flagAsString(int flag) {

    44         switch (flag) {

    45         case END_HEADERS:

    46             return "END_HEADERS";

    47         }

    48         return super.flagAsString(flag);

    49     }

    50 

    51     /**

    52      * Sets the array of hpack encoded ByteBuffers

    53      */

    54     public void setHeaderBlock(ByteBuffer bufs[], int offset, int number) {

    55         this.headerBlocks = bufs;

    56         this.offset = offset;

    57         this.number = number;

    58         int length = 0;

    59         for (int i=offset; i<offset+number; i++) {

    60             length += headerBlocks[i].remaining();

    61         }

    62         this.headerLength = length;

    63     }

    64 

    65     public void setHeaderBlock(ByteBuffer bufs[]) {

    66         setHeaderBlock(bufs, 0, bufs.length);

    67     }

    68 

    69     public ByteBuffer[] getHeaderBlock() {

    70         return headerBlocks;

    71     }

    72 

    73     /**

    74      * Returns true if this block is the final block of headers

    75      */

    76     public abstract boolean endHeaders();

    77 

    78 }