content: /*
   * Copyright (C) 2015 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 androidx.leanback.leanbackshowcase.utils;
  
  import android.util.SparseArray;
  import android.view.View;
  
  /**
   * ResourceCache allows retrieving children from a given view and caches the resulting views in
   * order to prevent future lookups.
   */
  public class ResourceCache {
  
      private final SparseArray<View> mCachedViews = new SparseArray<View>();
  
      public <ViewType extends View> ViewType getViewById(View view, int resId) {
          View child = mCachedViews.get(resId, null);
          if (child == null) {
              child = view.findViewById(resId);
              mCachedViews.put(resId, child);
          }
          return (ViewType) child;
      }
  }
  