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Java > Open Source Codes > org > apache > mina > filter > codec > textline > LineDelimiter


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements. See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership. The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License. You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing,
13  * software distributed under the License is distributed on an
14  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15  * KIND, either express or implied. See the License for the
16  * specific language governing permissions and limitations
17  * under the License.
18  *
19  */
20 package org.apache.mina.filter.codec.textline;
21
22 import java.io.ByteArrayOutputStream JavaDoc;
23 import java.io.PrintWriter JavaDoc;
24
25 /**
26  * A delimiter which is appended to the end of a text line, such as
27  * <tt>CR/LF</tt>.
28  *
29  * @author The Apache Directory Project (mina-dev@directory.apache.org)
30  * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (금, 13 7월 2007) $
31  */
32 public class LineDelimiter {
33     /**
34      * the line delimiter constant of the current O/S.
35      */
36     public static final LineDelimiter DEFAULT;
37
38     static {
39         ByteArrayOutputStream JavaDoc bout = new ByteArrayOutputStream JavaDoc();
40         PrintWriter JavaDoc out = new PrintWriter JavaDoc(bout);
41         out.println();
42         DEFAULT = new LineDelimiter(new String JavaDoc(bout.toByteArray()));
43     }
44
45     /**
46      * A special line delimiter which is used for auto-detection of
47      * EOL in {@link TextLineDecoder}. If this delimiter is used,
48      * {@link TextLineDecoder} will consider both <tt>'\r'</tt> and
49      * <tt>'\n'</tt> as a delimiter.
50      */
51     public static final LineDelimiter AUTO = new LineDelimiter("");
52
53     /**
54      * The line delimiter constant of UNIX (<tt>"\n"</tt>)
55      */
56     public static final LineDelimiter UNIX = new LineDelimiter("\n");
57
58     /**
59      * The line delimiter constant of MS Windows/DOS (<tt>"\r\n"</tt>)
60      */
61     public static final LineDelimiter WINDOWS = new LineDelimiter("\r\n");
62
63     /**
64      * The line delimiter constant of Mac OS (<tt>"\r"</tt>)
65      */
66     public static final LineDelimiter MAC = new LineDelimiter("\r");
67
68     private final String JavaDoc value;
69
70     /**
71      * Creates a new line delimiter with the specified <tt>value</tt>.
72      */
73     public LineDelimiter(String JavaDoc value) {
74         if (value == null) {
75             throw new NullPointerException JavaDoc("delimiter");
76         }
77         this.value = value;
78     }
79
80     /**
81      * Return the delimiter string.
82      */
83     public String JavaDoc getValue() {
84         return value;
85     }
86
87     public int hashCode() {
88         return value.hashCode();
89     }
90
91     public boolean equals(Object JavaDoc o) {
92         if (!(o instanceof LineDelimiter)) {
93             return false;
94         }
95
96         LineDelimiter that = (LineDelimiter) o;
97         return this.value.equals(that.value);
98     }
99
100     public String JavaDoc toString() {
101         StringBuffer JavaDoc buf = new StringBuffer JavaDoc();
102         buf.append("delimiter:");
103         if (value.length() == 0) {
104             buf.append(" auto");
105         } else {
106             for (int i = 0; i < value.length(); i++) {
107                 buf.append(" 0x");
108                 buf.append(Integer.toHexString(value.charAt(i)));
109             }
110         }
111         return buf.toString();
112     }
113 }
114
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