content: /*
   * Copyright (C) 2011 Google Inc.
   * Licensed to 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.ex.photo.loaders;
  
  import android.content.Context;
  import android.database.Cursor;
  import android.net.Uri;
  import androidx.loader.content.CursorLoader;
  
  import com.android.ex.photo.provider.PhotoContract;
  
  /**
   * Loader for a set of photo IDs.
   */
  public class PhotoPagerLoader extends CursorLoader {
      private final Uri mPhotosUri;
      private final String[] mProjection;
  
      public PhotoPagerLoader(
              Context context, Uri photosUri, String[] projection) {
          super(context);
          mPhotosUri = photosUri;
          mProjection = projection != null ? projection : PhotoContract.PhotoQuery.PROJECTION;
      }
  
      @Override
      public Cursor loadInBackground() {
          Cursor returnCursor = null;
  
          final Uri loaderUri = mPhotosUri.buildUpon().appendQueryParameter(
                  PhotoContract.ContentTypeParameters.CONTENT_TYPE, "image/").build();
          setUri(loaderUri);
          setProjection(mProjection);
          returnCursor = super.loadInBackground();
  
          return returnCursor;
      }
  }
  