content: /*
   * Copyright (C) 2017 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 android.service.autofill;
  
  import static android.view.autofill.Helper.sDebug;
  
  import android.annotation.NonNull;
  import android.annotation.TestApi;
  import android.os.Parcelable;
  import android.util.Log;
  import android.util.Pair;
  import android.widget.RemoteViews;
  
  import java.util.ArrayList;
  
  /**
   * Superclass of all transformation the system understands. As this is not public all
   * subclasses have to implement {@link Transformation} again.
   *
   * @hide
   */
  @TestApi
  public abstract class InternalTransformation implements Transformation, Parcelable {
  
      private static final String TAG = "InternalTransformation";
  
      /**
       * Applies this transformation to a child view of a {@link android.widget.RemoteViews
       * presentation template}.
       *
       * @param finder object used to find the value of a field in the screen.
       * @param template the {@link RemoteViews presentation template}.
       * @param childViewId resource id of the child view inside the template.
       */
      abstract void apply(@NonNull ValueFinder finder, @NonNull RemoteViews template,
              int childViewId) throws Exception;
  
      /**
       * Applies multiple transformations to the children views of a
       * {@link android.widget.RemoteViews presentation template}.
       *
       * @param finder object used to find the value of a field in the screen.
       * @param template the {@link RemoteViews presentation template}.
       * @param transformations map of resource id of the child view inside the template to
       * transformation.
       */
      public static boolean batchApply(@NonNull ValueFinder finder, @NonNull RemoteViews template,
              @NonNull ArrayList<Pair<Integer, InternalTransformation>> transformations) {
          final int size = transformations.size();
          if (sDebug) Log.d(TAG, "getPresentation(): applying " + size + " transformations");
          for (int i = 0; i < size; i++) {
              final Pair<Integer, InternalTransformation> pair = transformations.get(i);
              final int id = pair.first;
              final InternalTransformation transformation = pair.second;
              if (sDebug) Log.d(TAG, "#" + i + ": " + transformation);
  
              try {
                  transformation.apply(finder, template, id);
              } catch (Exception e) {
                  // Do not log full exception to avoid PII leaking
                  Log.e(TAG, "Could not apply transformation " + transformation + ": "
                          + e.getClass());
                  return false;
              }
          }
          return true;
      }
  }
  