1 /* 2 * Copyright (C) 2012 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 libcore.io; 18 19 public final class EventLogger { 20 21 /** 22 * Hook for customizing how events are reported. 23 */ 24 private static volatile Reporter REPORTER = new DefaultReporter(); 25 26 /** 27 * Used to replace default Reporter for logging events. Must be non-null. 28 */ setReporter(Reporter reporter)29 public static void setReporter(Reporter reporter) { 30 if (reporter == null) { 31 throw new NullPointerException("reporter == null"); 32 } 33 REPORTER = reporter; 34 } 35 36 /** 37 * Returns non-null Reporter. 38 */ getReporter()39 public static Reporter getReporter() { 40 return REPORTER; 41 } 42 43 /** 44 * Interface to allow customization of reporting behavior. 45 */ 46 public static interface Reporter { report(int code, Object... list)47 public void report (int code, Object... list); 48 } 49 50 /** 51 * Default Reporter which reports events to the log. 52 */ 53 private static final class DefaultReporter implements Reporter { 54 @Override report(int code, Object... list)55 public void report (int code, Object... list) { 56 StringBuilder sb = new StringBuilder(); 57 sb.append(code); 58 for (Object o : list) { 59 sb.append(","); 60 sb.append(o.toString()); 61 } 62 System.out.println(sb); 63 } 64 } 65 writeEvent(int code, Object... list)66 public static void writeEvent(int code, Object... list) { 67 getReporter().report(code, list); 68 } 69 } 70