content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.android.server.wifi.util;
  
  import android.annotation.NonNull;
  import android.os.Handler;
  import android.os.Looper;
  import android.os.Message;
  
  import com.android.internal.annotations.VisibleForTesting;
  import com.android.server.wifi.WifiInjector;
  import com.android.server.wifi.WifiLog;
  
  /**
   * This class subclasses Handler to log incoming messages
   */
  public class WifiHandler extends Handler {
      private static final String LOG_TAG = "WifiHandler";
      private WifiLog mLog;
      private String mTag;
  
      public WifiHandler(String tag, Looper looper) {
          super(looper);
          mTag = LOG_TAG + "." + tag;
      }
  
      @NonNull
      private WifiLog getOrInitLog() {
          // Lazy initialization of mLog
          if (mLog == null) {
              mLog = WifiInjector.getInstance().makeLog(mTag);
          }
          return mLog;
      }
  
      @Override
      public void handleMessage(Message msg) {
          getOrInitLog().trace("Received message=% sendingUid=%")
                  .c(msg.what)
                  .c(msg.sendingUid)
                  .flush();
      }
  
      /**
       * @hide
       */
      @VisibleForTesting
      public void setWifiLog(WifiLog wifiLog) {
          // TODO WifiInjector should be passed as a variable in the constructor
          // b/33308811 tracks removing lazy initializations of mLog
          mLog = wifiLog;
      }
  }
  