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.provider;
  
  import android.annotation.SystemApi;
  import android.net.Uri;
  
  /**
   * A set of constants for implementing a time zone data content provider, which is used by the time
   * zone updater application.
   *
   * @hide
   */
  @SystemApi
  public final class TimeZoneRulesDataContract {
  
      private TimeZoneRulesDataContract() {}
  
      /**
       * The authority that <em>must</em> be used for the time zone data content provider.
       * To be accepted by the time zone updater application it <em>must</em> be exposed by the
       * package specified in the config_timeZoneRulesDataPackage config value.
       */
      public static final String AUTHORITY = "com.android.timezone";
  
      /** A content:// style uri to the authority for the time zone data content provider */
      private static final Uri AUTHORITY_URI = Uri.parse("content://" + AUTHORITY);
  
      /**
       * Defines fields exposed through the {@link Operation#CONTENT_URI} for describing a time zone
       * distro operation.
       */
      public static final class Operation {
  
          /** Not instantiable. */
          private Operation() {
          }
  
          /**
           * The content:// style URI for determining what type of update is available.
           *
           * <p>The URI can be queried using
           * {@link android.content.ContentProvider#query(Uri, String[], String, String[], String)};
           * the result will be a cursor with a single row. If the {@link Operation#COLUMN_TYPE}
           * column is {@link Operation#TYPE_INSTALL} then
           * {@link android.content.ContentProvider#openFile(Uri, String)} can be used with "r" mode
           * to obtain the binary data.
           */
          public static final Uri CONTENT_URI = Uri.withAppendedPath(AUTHORITY_URI, "operation");
  
          /**
           * The {@code String} column of the {@link #CONTENT_URI} that provides an int specifying
           * the type of operation to perform. See {@link #TYPE_NO_OP},
           * {@link #TYPE_UNINSTALL} and {@link #TYPE_INSTALL}.
           */
          public static final String COLUMN_TYPE = "type";
  
          /**
           * An operation type used when the current time zone rules on device should be replaced by
           * a new set obtained via the {@link android.content.ContentProvider#openFile(Uri, String)}
           * method.
           */
          public static final String TYPE_INSTALL = "INSTALL";
  
          /**
           * An operation type used when the current time zone rules on device should be uninstalled,
           * returning to the values held in the system partition.
           */
          public static final String TYPE_UNINSTALL = "UNINSTALL";
  
          /**
           * An operation type used when the time zone rules on device should be left as they are.
           * This is not expected to be used in normal operation but a safe result in the event of an
           * error that cannot be recovered from.
           */
          public static final String TYPE_NO_OP = "NOOP";
  
          /**
           * The {@code nullable int} column of the {@link #CONTENT_URI} that describes the major
           * version of the distro to be installed.
           * Only non-null if {@link #COLUMN_TYPE} contains {@link #TYPE_INSTALL}.
           */
          public static final String COLUMN_DISTRO_MAJOR_VERSION = "distro_major_version";
  
          /**
           * The {@code nullable int} column of the {@link #CONTENT_URI} that describes the minor
           * version of the distro to be installed.
           * Only non-null if {@link #COLUMN_TYPE} contains {@link #TYPE_INSTALL}.
           */
          public static final String COLUMN_DISTRO_MINOR_VERSION = "distro_minor_version";
  
          /**
           * The {@code nullable String} column of the {@link #CONTENT_URI} that describes the IANA
           * rules version of the distro to be installed.
           * Only non-null if {@link #COLUMN_TYPE} contains {@link #TYPE_INSTALL}.
           */
          public static final String COLUMN_RULES_VERSION = "rules_version";
  
          /**
           * The {@code nullable int} column of the {@link #CONTENT_URI} that describes the revision
           * number of the distro to be installed.
           * Only non-null if {@link #COLUMN_TYPE} contains {@link #TYPE_INSTALL}.
           */
          public static final String COLUMN_REVISION = "revision";
      }
  }
  