1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.http;
20
21 import java.nio.ByteBuffer;
22 import java.util.EnumSet;
23
24 import org.eclipse.jetty.util.ArrayTrie;
25 import org.eclipse.jetty.util.BufferUtil;
26 import org.eclipse.jetty.util.Trie;
27
28
29 /**
30 *
31 */
32 public enum HttpHeaderValue
33 {
34 CLOSE("close"),
35 CHUNKED("chunked"),
36 GZIP("gzip"),
37 IDENTITY("identity"),
38 KEEP_ALIVE("keep-alive"),
39 CONTINUE("100-continue"),
40 PROCESSING("102-processing"),
41 TE("TE"),
42 BYTES("bytes"),
43 NO_CACHE("no-cache"),
44 UPGRADE("Upgrade"),
45 UNKNOWN("::UNKNOWN::");
46
47 /* ------------------------------------------------------------ */
48 public final static Trie<HttpHeaderValue> CACHE= new ArrayTrie<HttpHeaderValue>();
49 static
50 {
51 for (HttpHeaderValue value : HttpHeaderValue.values())
52 if (value!=UNKNOWN)
53 CACHE.put(value.toString(),value);
54 }
55
56 private final String _string;
57 private final ByteBuffer _buffer;
58
59 /* ------------------------------------------------------------ */
60 HttpHeaderValue(String s)
61 {
62 _string=s;
63 _buffer=BufferUtil.toBuffer(s);
64 }
65
66 /* ------------------------------------------------------------ */
67 public ByteBuffer toBuffer()
68 {
69 return _buffer.asReadOnlyBuffer();
70 }
71
72 /* ------------------------------------------------------------ */
73 public String asString()
74 {
75 return _string;
76 }
77
78 /* ------------------------------------------------------------ */
79 @Override
80 public String toString()
81 {
82 return _string;
83 }
84
85 /* ------------------------------------------------------------ */
86 private static EnumSet<HttpHeader> __known =
87 EnumSet.of(HttpHeader.CONNECTION,
88 HttpHeader.TRANSFER_ENCODING,
89 HttpHeader.CONTENT_ENCODING);
90
91 /* ------------------------------------------------------------ */
92 public static boolean hasKnownValues(HttpHeader header)
93 {
94 if (header==null)
95 return false;
96 return __known.contains(header);
97 }
98 }