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comparison: mobile/android/thirdparty/ch/boye/httpclientandroidlib/message/LineFormatter.java

mobile/android/thirdparty/ch/boye/httpclientandroidlib/message/LineFormatter.java

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1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package ch.boye.httpclientandroidlib.message;
29
30 import ch.boye.httpclientandroidlib.ProtocolVersion;
31 import ch.boye.httpclientandroidlib.RequestLine;
32 import ch.boye.httpclientandroidlib.StatusLine;
33 import ch.boye.httpclientandroidlib.Header;
34 import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
35
36 /**
37 * Interface for formatting elements of the HEAD section of an HTTP message.
38 * This is the complement to {@link LineParser}.
39 * There are individual methods for formatting a request line, a
40 * status line, or a header line. The formatting does <i>not</i> include the
41 * trailing line break sequence CR-LF.
42 * Instances of this interface are expected to be stateless and thread-safe.
43 *
44 * <p>
45 * The formatted lines are returned in memory, the formatter does not depend
46 * on any specific IO mechanism.
47 * In order to avoid unnecessary creation of temporary objects,
48 * a buffer can be passed as argument to all formatting methods.
49 * The implementation may or may not actually use that buffer for formatting.
50 * If it is used, the buffer will first be cleared by the
51 * <code>formatXXX</code> methods.
52 * The argument buffer can always be re-used after the call. The buffer
53 * returned as the result, if it is different from the argument buffer,
54 * MUST NOT be modified.
55 * </p>
56 *
57 * @since 4.0
58 */
59 public interface LineFormatter {
60
61 /**
62 * Formats a protocol version.
63 * This method does <i>not</i> follow the general contract for
64 * <code>buffer</code> arguments.
65 * It does <i>not</i> clear the argument buffer, but appends instead.
66 * The returned buffer can always be modified by the caller.
67 * Because of these differing conventions, it is not named
68 * <code>formatProtocolVersion</code>.
69 *
70 * @param buffer a buffer to which to append, or <code>null</code>
71 * @param version the protocol version to format
72 *
73 * @return a buffer with the formatted protocol version appended.
74 * The caller is allowed to modify the result buffer.
75 * If the <code>buffer</code> argument is not <code>null</code>,
76 * the returned buffer is the argument buffer.
77 */
78 CharArrayBuffer appendProtocolVersion(CharArrayBuffer buffer,
79 ProtocolVersion version);
80
81 /**
82 * Formats a request line.
83 *
84 * @param buffer a buffer available for formatting, or
85 * <code>null</code>.
86 * The buffer will be cleared before use.
87 * @param reqline the request line to format
88 *
89 * @return the formatted request line
90 */
91 CharArrayBuffer formatRequestLine(CharArrayBuffer buffer,
92 RequestLine reqline);
93
94 /**
95 * Formats a status line.
96 *
97 * @param buffer a buffer available for formatting, or
98 * <code>null</code>.
99 * The buffer will be cleared before use.
100 * @param statline the status line to format
101 *
102 * @return the formatted status line
103 *
104 * @throws ch.boye.httpclientandroidlib.ParseException in case of a parse error
105 */
106 CharArrayBuffer formatStatusLine(CharArrayBuffer buffer,
107 StatusLine statline);
108
109 /**
110 * Formats a header.
111 * Due to header continuation, the result may be multiple lines.
112 * In order to generate well-formed HTTP, the lines in the result
113 * must be separated by the HTTP line break sequence CR-LF.
114 * There is <i>no</i> trailing CR-LF in the result.
115 * <br/>
116 * See the class comment for details about the buffer argument.
117 *
118 * @param buffer a buffer available for formatting, or
119 * <code>null</code>.
120 * The buffer will be cleared before use.
121 * @param header the header to format
122 *
123 * @return a buffer holding the formatted header, never <code>null</code>.
124 * The returned buffer may be different from the argument buffer.
125 *
126 * @throws ch.boye.httpclientandroidlib.ParseException in case of a parse error
127 */
128 CharArrayBuffer formatHeader(CharArrayBuffer buffer,
129 Header header);
130
131 }

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