content: package com.android.launcher3.util;
  
  /**
   * 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.
   */
  
  import android.content.ContentValues;
  import android.content.Context;
  import android.content.Intent;
  import android.graphics.Bitmap;
  import android.net.Uri;
  import android.os.UserHandle;
  
  import com.android.launcher3.LauncherAppState;
  import com.android.launcher3.LauncherSettings;
  import com.android.launcher3.compat.UserManagerCompat;
  import com.android.launcher3.icons.GraphicsUtils;
  
  /**
   * A wrapper around {@link ContentValues} with some utility methods.
   */
  public class ContentWriter {
  
      private final ContentValues mValues;
      private final Context mContext;
  
      private CommitParams mCommitParams;
      private Bitmap mIcon;
      private UserHandle mUser;
  
      public ContentWriter(Context context, CommitParams commitParams) {
          this(context);
          mCommitParams = commitParams;
      }
  
      public ContentWriter(Context context) {
          this(new ContentValues(), context);
      }
  
      public ContentWriter(ContentValues values, Context context) {
          mValues = values;
          mContext = context;
      }
  
      public ContentWriter put(String key, Integer value) {
          mValues.put(key, value);
          return this;
      }
  
      public ContentWriter put(String key, Long value) {
          mValues.put(key, value);
          return this;
      }
  
      public ContentWriter put(String key, String value) {
          mValues.put(key, value);
          return this;
      }
  
      public ContentWriter put(String key, CharSequence value) {
          mValues.put(key, value == null ? null : value.toString());
          return this;
      }
  
      public ContentWriter put(String key, Intent value) {
          mValues.put(key, value == null ? null : value.toUri(0));
          return this;
      }
  
      public ContentWriter putIcon(Bitmap value, UserHandle user) {
          mIcon = value;
          mUser = user;
          return this;
      }
  
      public ContentWriter put(String key, UserHandle user) {
          return put(key, UserManagerCompat.getInstance(mContext).getSerialNumberForUser(user));
      }
  
      /**
       * Commits any pending validation and returns the final values.
       * Must not be called on UI thread.
       */
      public ContentValues getValues(Context context) {
          Preconditions.assertNonUiThread();
          if (mIcon != null && !LauncherAppState.getInstance(context).getIconCache()
                  .isDefaultIcon(mIcon, mUser)) {
              mValues.put(LauncherSettings.Favorites.ICON, GraphicsUtils.flattenBitmap(mIcon));
              mIcon = null;
          }
          return mValues;
      }
  
      public int commit() {
          if (mCommitParams != null) {
              return mContext.getContentResolver().update(mCommitParams.mUri, getValues(mContext),
                      mCommitParams.mWhere, mCommitParams.mSelectionArgs);
          }
          return 0;
      }
  
      public static final class CommitParams {
  
          final Uri mUri = LauncherSettings.Favorites.CONTENT_URI;
          String mWhere;
          String[] mSelectionArgs;
  
          public CommitParams(String where, String[] selectionArgs) {
              mWhere = where;
              mSelectionArgs = selectionArgs;
          }
  
      }
  }
  