1/*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements.  See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package java.util.logging;
19
20import java.io.PrintWriter;
21import java.io.StringWriter;
22import java.text.MessageFormat;
23import java.util.Date;
24import libcore.io.IoUtils;
25
26/**
27 * {@code SimpleFormatter} can be used to print a summary of the information
28 * contained in a {@code LogRecord} object in a human readable format.
29 */
30public class SimpleFormatter extends Formatter {
31    /**
32     * Constructs a new {@code SimpleFormatter}.
33     */
34    public SimpleFormatter() {
35    }
36
37    /**
38     * Converts a {@link LogRecord} object into a human readable string
39     * representation.
40     *
41     * @param r
42     *            the log record to be formatted into a string.
43     * @return the formatted string.
44     */
45    @Override
46    public String format(LogRecord r) {
47        StringBuilder sb = new StringBuilder();
48        sb.append(MessageFormat.format("{0, date} {0, time} ",
49                new Object[] { new Date(r.getMillis()) }));
50        sb.append(r.getSourceClassName()).append(" ");
51        sb.append(r.getSourceMethodName()).append(System.lineSeparator());
52        sb.append(r.getLevel().getName()).append(": ");
53        sb.append(formatMessage(r)).append(System.lineSeparator());
54        if (r.getThrown() != null) {
55            sb.append("Throwable occurred: ");
56            Throwable t = r.getThrown();
57            PrintWriter pw = null;
58            try {
59                StringWriter sw = new StringWriter();
60                pw = new PrintWriter(sw);
61                t.printStackTrace(pw);
62                sb.append(sw.toString());
63            } finally {
64                IoUtils.closeQuietly(pw);
65            }
66        }
67        return sb.toString();
68    }
69}
70