1 /*
2  * Copyright (C) 2009 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package dalvik.system;
18 
19 /**
20  * Utility methods for logging to {@code DalvikHandlers}.
21  *
22  * @hide
23  */
24 public final class DalvikLogging {
DalvikLogging()25     private DalvikLogging() {}
26 
27     /**
28      * Returns the short logger tag (up to 23 chars) for the given logger name.
29      * Traditionally loggers are named by fully-qualified Java classes; this
30      * method attempts to return a concise identifying part of such names.
31      */
loggerNameToTag(String loggerName)32     public static String loggerNameToTag(String loggerName) {
33         // Anonymous logger.
34         if (loggerName == null) {
35             return "null";
36         }
37 
38         int length = loggerName.length();
39         if (length <= 23) {
40             return loggerName;
41         }
42 
43         int lastPeriod = loggerName.lastIndexOf(".");
44         return length - (lastPeriod + 1) <= 23
45                 ? loggerName.substring(lastPeriod + 1)
46                 : loggerName.substring(loggerName.length() - 23);
47     }
48 }
49