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
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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.
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24  */
25 
26 package jdk.internal.net.http.frame;
27 
28 import jdk.internal.net.http.common.Utils;
29 
30 import java.nio.ByteBuffer;
31 import java.util.List;
32 
33 /**
34  * Either a HeadersFrame or a ContinuationFrame
35  */
36 public abstract class HeaderFrame extends Http2Frame {
37 
38     final int headerLength;
39     final List<ByteBuffer> headerBlocks;
40 
41     public static final int END_STREAM = 0x1;
42     public static final int END_HEADERS = 0x4;
43 
HeaderFrame(int streamid, int flags, List<ByteBuffer> headerBlocks)44     public HeaderFrame(int streamid, int flags, List<ByteBuffer> headerBlocks) {
45         super(streamid, flags);
46         this.headerBlocks = headerBlocks;
47         this.headerLength = Utils.remaining(headerBlocks, Integer.MAX_VALUE);
48     }
49 
50     @Override
flagAsString(int flag)51     public String flagAsString(int flag) {
52         switch (flag) {
53             case END_HEADERS:
54                 return "END_HEADERS";
55             case END_STREAM:
56                 return "END_STREAM";
57         }
58         return super.flagAsString(flag);
59     }
60 
61 
getHeaderBlock()62     public List<ByteBuffer> getHeaderBlock() {
63         return headerBlocks;
64     }
65 
getHeaderLength()66     int getHeaderLength() {
67         return headerLength;
68     }
69 
70     /**
71      * Returns true if this block is the final block of headers.
72      */
endHeaders()73     public boolean endHeaders() {
74         return getFlag(END_HEADERS);
75     }
76 }
77