text: /**
   * Copyright 2017 Google Inc.
   *
   * 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 { SnapshotVersion } from '../core/snapshot_version';
  import { emptyByteString } from '../platform/platform';
  /** An enumeration of the different purposes we have for queries. */
  export var QueryPurpose;
  (function (QueryPurpose) {
      /** A regular, normal query. */
      QueryPurpose[QueryPurpose["Listen"] = 0] = "Listen";
      /**
       * The query was used to refill a query after an existence filter mismatch.
       */
      QueryPurpose[QueryPurpose["ExistenceFilterMismatch"] = 1] = "ExistenceFilterMismatch";
      /** The query was used to resolve a limbo document. */
      QueryPurpose[QueryPurpose["LimboResolution"] = 2] = "LimboResolution";
  })(QueryPurpose = QueryPurpose || (QueryPurpose = {}));
  /**
   * An immutable set of metadata that the local store tracks for each query.
   */
  var QueryData = /** @class */ (function () {
      function QueryData(
          /** The query being listened to. */
          query, 
          /**
           * The target ID to which the query corresponds; Assigned by the
           * LocalStore for user listens and by the SyncEngine for limbo watches.
           */
          targetId, 
          /** The purpose of the query. */
          purpose, 
          /** The latest snapshot version seen for this target. */
          snapshotVersion, 
          /**
           * An opaque, server-assigned token that allows watching a query to be
           * resumed after disconnecting without retransmitting all the data that
           * matches the query. The resume token essentially identifies a point in
           * time from which the server should resume sending results.
           */
          resumeToken) {
          if (snapshotVersion === void 0) { snapshotVersion = SnapshotVersion.MIN; }
          if (resumeToken === void 0) { resumeToken = emptyByteString(); }
          this.query = query;
          this.targetId = targetId;
          this.purpose = purpose;
          this.snapshotVersion = snapshotVersion;
          this.resumeToken = resumeToken;
      }
      /**
       * Creates a new query data instance with an updated snapshot version and
       * resume token.
       */
      QueryData.prototype.update = function (updated) {
          return new QueryData(this.query, this.targetId, this.purpose, updated.snapshotVersion, updated.resumeToken);
      };
      QueryData.prototype.equals = function (other) {
          return (this.targetId === other.targetId &&
              this.purpose === other.purpose &&
              this.snapshotVersion.equals(other.snapshotVersion) &&
              this.resumeToken === other.resumeToken &&
              this.query.equals(other.query));
      };
      return QueryData;
  }());
  export { QueryData };
  
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