1 /* 2 * Copyright (c) 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 package jdk.incubator.http.internal.hpack; 26 27 import java.nio.ByteBuffer; 28 import java.util.Iterator; 29 30 import static java.util.Objects.requireNonNull; 31 32 final class BulkSizeUpdateWriter implements BinaryRepresentationWriter { 33 34 private final SizeUpdateWriter writer = new SizeUpdateWriter(); 35 private Iterator<Integer> maxSizes; 36 private boolean writing; 37 private boolean configured; 38 39 BulkSizeUpdateWriter maxHeaderTableSizes(Iterable<Integer> sizes) { 40 if (configured) { 41 throw new IllegalStateException("Already configured"); 42 } 43 requireNonNull(sizes, "sizes"); 44 maxSizes = sizes.iterator(); 45 configured = true; 46 return this; 47 } 48 49 @Override 50 public boolean write(HeaderTable table, ByteBuffer destination) { 51 if (!configured) { 52 throw new IllegalStateException("Configure first"); 53 } 54 while (true) { 55 if (writing) { 56 if (!writer.write(table, destination)) { 57 return false; 58 } 59 writing = false; 60 } else if (maxSizes.hasNext()) { 61 writing = true; 62 writer.reset(); 63 writer.maxHeaderTableSize(maxSizes.next()); 64 } else { 65 configured = false; 66 return true; 67 } 68 } 69 } 70 71 @Override 72 public BulkSizeUpdateWriter reset() { 73 maxSizes = null; 74 writing = false; 75 configured = false; 76 return this; 77 } 78 }