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.io.IOException;

    29 import java.nio.ByteBuffer;

    30 

    31 class WindowUpdateFrame extends Http2Frame {

    32 

    33     int windowUpdate;

    34 

    35     WindowUpdateFrame() {

    36         type = TYPE;

    37     }

    38 

    39     public final static int TYPE = 0x8;

    40 

    41     public void setUpdate(int windowUpdate) {

    42         this.windowUpdate = windowUpdate;

    43     }

    44 

    45     @Override

    46     public String toString() {

    47         StringBuilder sb = new StringBuilder();

    48         sb.append(super.toString())

    49           .append(" WindowUpdate: ")

    50           .append(windowUpdate);

    51         return sb.toString();

    52     }

    53 

    54     public int getUpdate() {

    55         return this.windowUpdate;

    56     }

    57 

    58     /**

    59      */

    60     @Override

    61     void readIncomingImpl(ByteBufferConsumer bc) throws IOException {

    62         if (length != 4) {

    63             throw new IOException("Invalid WindowUpdate frame");

    64         }

    65         windowUpdate = bc.getInt() & 0x7fffffff;

    66     }

    67 

    68     @Override

    69     void computeLength() {

    70         length = 4;

    71     }

    72 

    73     @Override

    74     void writeOutgoing(ByteBufferGenerator bg) {

    75         super.writeOutgoing(bg);

    76         ByteBuffer buf = bg.getBuffer(4);

    77         buf.putInt(windowUpdate);

    78     }

    79 }