1 /*
   2  * Copyright (c) 2015, 2017, 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 package jdk.incubator.http.internal.hpack;
  26 
  27 import java.nio.ByteBuffer;
  28 
  29 final class SizeUpdateWriter implements BinaryRepresentationWriter {
  30 
  31     private final IntegerWriter intWriter = new IntegerWriter();
  32     private int maxSize;
  33     private boolean tableUpdated;
  34 
  35     SizeUpdateWriter() { }
  36 
  37     SizeUpdateWriter maxHeaderTableSize(int size) {
  38         intWriter.configure(size, 5, 0b0010_0000);
  39         this.maxSize = size;
  40         return this;
  41     }
  42 
  43     @Override
  44     public boolean write(HeaderTable table, ByteBuffer destination) {
  45         if (!tableUpdated) {
  46             table.setMaxSize(maxSize);
  47             tableUpdated = true;
  48         }
  49         return intWriter.write(destination);
  50     }
  51 
  52     @Override
  53     public BinaryRepresentationWriter reset() {
  54         intWriter.reset();
  55         maxSize = -1;
  56         tableUpdated = false;
  57         return this;
  58     }
  59 }