1 /* SimpleFormatter.java --
2 A class for formatting log records into short human-readable messages
3 Copyright (C) 2002, 2004 Free Software Foundation, Inc.
5 This file is part of GNU Classpath.
7 GNU Classpath is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Classpath is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Classpath; see the file COPYING. If not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 Linking this library statically or dynamically with other modules is
23 making a combined work based on this library. Thus, the terms and
24 conditions of the GNU General Public License cover the whole
27 As a special exception, the copyright holders of this library give you
28 permission to link this library with independent modules to produce an
29 executable, regardless of the license terms of these independent
30 modules, and to copy and distribute the resulting executable under
31 terms of your choice, provided that you also meet, for each linked
32 independent module, the terms and conditions of the license of that
33 module. An independent module is a module which is not derived from
34 or based on this library. If you modify this library, you may extend
35 this exception to your version of the library, but you are not
36 obligated to do so. If you do not wish to do so, delete this
37 exception statement from your version. */
40 package java.util.logging;
42 import java.io.PrintWriter;
43 import java.io.StringWriter;
44 import java.text.DateFormat;
45 import java.util.Date;
48 * A <code>SimpleFormatter</code> formats log records into
49 * short human-readable messages, typically one or two lines.
51 * @author Sascha Brawer (brawer@acm.org)
53 public class SimpleFormatter
57 * Constructs a SimpleFormatter.
59 public SimpleFormatter()
65 * An instance of a DateFormatter that is used for formatting
66 * the time of a log record into a human-readable string,
67 * according to the rules of the current locale. The value
68 * is set after the first invocation of format, since it is
69 * common that a JVM will instantiate a SimpleFormatter without
72 private DateFormat dateFormat;
75 * The character sequence that is used to separate lines in the
76 * generated stream. Somewhat surprisingly, the Sun J2SE 1.4
77 * reference implementation always uses UNIX line endings, even on
78 * platforms that have different line ending conventions (i.e.,
79 * DOS). The GNU implementation does not replicate this bug.
81 * @see Sun bug parade, bug #4462871,
82 * "java.util.logging.SimpleFormatter uses hard-coded line separator".
84 static final String lineSep = System.getProperty("line.separator");
88 * Formats a log record into a String.
90 * @param record the log record to be formatted.
92 * @return a short human-readable message, typically one or two
93 * lines. Lines are separated using the default platform line
96 * @throws NullPointerException if <code>record</code>
97 * is <code>null</code>.
99 public String format(LogRecord record)
101 StringBuffer buf = new StringBuffer(180);
103 if (dateFormat == null)
104 dateFormat = DateFormat.getDateTimeInstance();
106 buf.append(dateFormat.format(new Date(record.getMillis())));
108 buf.append(record.getSourceClassName());
110 buf.append(record.getSourceMethodName());
113 buf.append(record.getLevel());
115 buf.append(formatMessage(record));
119 Throwable throwable = record.getThrown();
120 if (throwable != null)
122 StringWriter sink = new StringWriter();
123 throwable.printStackTrace(new PrintWriter(sink, true));
124 buf.append(sink.toString());
127 return buf.toString();