@@ -0,0 +1,1551 @@
+/*%0A * Copyright 2015 Google Inc. All rights reserved.%0A *%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A *      http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0A%0Apackage org.physical_web.physicalweb;%0A%0Aimport java.util.Date;%0A%0Aabstract class PwoDiscoverer %7B%0A%0A  private PwoDiscoveryCallback mPwoDiscoveryCallback;%0A  private long mScanStartTime;%0A%0A  public abstract void startScanImpl();%0A  public abstract void stopScanImpl();%0A%0A  public void startScan() %7B%0A    mScanStartTime = new Date().getTime();%0A    startScanImpl();%0A  %7D%0A%0A  public void stopScan() %7B%0A    stopScanImpl();%0A  %7D%0A%0A  public void setCallback(PwoDiscoveryCallback pwoDiscoveryCallback) %7B%0A    mPwoDiscoveryCallback = pwoDiscoveryCallback;%0A  %7D%0A%0A  protected PwoMetadata createPwoMetadata(String url) %7B%0A    PwoMetadata pwoMetadata = new PwoMetadata(url, new Date().getTime() - mScanStartTime);%0A    return pwoMetadata;%0A  %7D%0A%0A  protected void reportPwo(PwoMetadata pwoMetadata) %7B%0A    mPwoDiscoveryCallback.onPwoDiscovered(pwoMetadata);%0A  %7D%0A%0A  public interface PwoDiscoveryCallback %7B%0A    public void onPwoDiscovered(PwoMetadata pwoMetadata);%0A  %7D%0A%7D%0A

Add a PwoDiscoverer class