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 26 package jdk.incubator.http.internal.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 }