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 jdk.internal.net.http.frame;

    27 

    28 import java.nio.ByteBuffer;

    29 import java.util.List;

    30 

    31 public class HeadersFrame extends HeaderFrame {

    32 

    33     public static final int TYPE = 0x1;

    34 

    35     // Flags

    36     public static final int END_STREAM = 0x1;

    37     public static final int PADDED = 0x8;

    38     public static final int PRIORITY = 0x20;

    39 

    40 

    41     private int padLength;

    42     private int streamDependency;

    43     private int weight;

    44     private boolean exclusive;

    45 

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

    47         super(streamid, flags, headerBlocks);

    48         if (padLength > 0) {

    49             setPadLength(padLength);

    50         }

    51     }

    52 

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

    54         super(streamid, flags, headerBlocks);

    55     }

    56 

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

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

    59     }

    60 

    61     @Override

    62     public int type() {

    63         return TYPE;

    64     }

    65 

    66     @Override

    67     int length() {

    68         return headerLength

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

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

    71     }

    72 

    73     @Override

    74     public String flagAsString(int flag) {

    75         switch (flag) {

    76             case END_STREAM:

    77                 return "END_STREAM";

    78             case PADDED:

    79                 return "PADDED";

    80             case PRIORITY:

    81                 return "PRIORITY";

    82         }

    83         return super.flagAsString(flag);

    84     }

    85 

    86     public void setPadLength(int padLength) {

    87         this.padLength = padLength;

    88         flags |= PADDED;

    89     }

    90 

    91     int getPadLength() {

    92         return padLength;

    93     }

    94 

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

    96         this.streamDependency = streamDependency;

    97         this.exclusive = exclusive;

    98         this.weight = weight;

    99         this.flags |= PRIORITY;

   100     }

   101 

   102     public int getStreamDependency() {

   103         return streamDependency;

   104     }

   105 

   106     public int getWeight() {

   107         return weight;

   108     }

   109 

   110     public boolean getExclusive() {

   111         return exclusive;

   112     }

   113 

   114 }