text: /**
   * Index metadata contains all information about table's index.
   */
  var IndexMetadata = /** @class */ (function () {
      // ---------------------------------------------------------------------
      // Constructor
      // ---------------------------------------------------------------------
      function IndexMetadata(options) {
          /**
           * Indicates if this index must be unique.
           */
          this.isUnique = false;
          /**
           * The SPATIAL modifier indexes the entire column and does not allow indexed columns to contain NULL values.
           * Works only in MySQL.
           */
          this.isSpatial = false;
          /**
           * The FULLTEXT modifier indexes the entire column and does not allow prefixing.
           * Works only in MySQL.
           */
          this.isFulltext = false;
          /**
           * Indicates if this index must synchronize with database index.
           */
          this.synchronize = true;
          /**
           * Indexed columns.
           */
          this.columns = [];
          /**
           * Map of column names with order set.
           * Used only by MongoDB driver.
           */
          this.columnNamesWithOrderingMap = {};
          this.entityMetadata = options.entityMetadata;
          this.embeddedMetadata = options.embeddedMetadata;
          if (options.columns)
              this.columns = options.columns;
          if (options.args) {
              this.target = options.args.target;
              if (options.args.synchronize !== null && options.args.synchronize !== undefined)
                  this.synchronize = options.args.synchronize;
              this.isUnique = !!options.args.unique;
              this.isSpatial = !!options.args.spatial;
              this.isFulltext = !!options.args.fulltext;
              this.where = options.args.where;
              this.isSparse = options.args.sparse;
              this.isBackground = options.args.background;
              this.expireAfterSeconds = options.args.expireAfterSeconds;
              this.givenName = options.args.name;
              this.givenColumnNames = options.args.columns;
          }
      }
      // ---------------------------------------------------------------------
      // Public Build Methods
      // ---------------------------------------------------------------------
      /**
       * Builds some depend index properties.
       * Must be called after all entity metadata's properties map, columns and relations are built.
       */
      IndexMetadata.prototype.build = function (namingStrategy) {
          var _this = this;
          if (this.synchronize === false) {
              this.name = this.givenName;
              return this;
          }
          var map = {};
          // if columns already an array of string then simply return it
          if (this.givenColumnNames) {
              var columnPropertyPaths = [];
              if (this.givenColumnNames instanceof Array) {
                  columnPropertyPaths = this.givenColumnNames.map(function (columnName) {
                      if (_this.embeddedMetadata)
                          return _this.embeddedMetadata.propertyPath + "." + columnName;
                      return columnName;
                  });
                  columnPropertyPaths.forEach(function (propertyPath) { return map[propertyPath] = 1; });
              }
              else { // todo: indices in embeds are not implemented in this syntax. deprecate this syntax?
                  // if columns is a function that returns array of field names then execute it and get columns names from it
                  var columnsFnResult_1 = this.givenColumnNames(this.entityMetadata.propertiesMap);
                  if (columnsFnResult_1 instanceof Array) {
                      columnPropertyPaths = columnsFnResult_1.map(function (i) { return String(i); });
                      columnPropertyPaths.forEach(function (name) { return map[name] = 1; });
                  }
                  else {
                      columnPropertyPaths = Object.keys(columnsFnResult_1).map(function (i) { return String(i); });
                      Object.keys(columnsFnResult_1).forEach(function (columnName) { return map[columnName] = columnsFnResult_1[columnName]; });
                  }
              }
              this.columns = columnPropertyPaths.map(function (propertyPath) {
                  var columnWithSameName = _this.entityMetadata.columns.find(function (column) { return column.propertyPath === propertyPath; });
                  if (columnWithSameName) {
                      return [columnWithSameName];
                  }
                  var relationWithSameName = _this.entityMetadata.relations.find(function (relation) { return relation.isWithJoinColumn && relation.propertyName === propertyPath; });
                  if (relationWithSameName) {
                      return relationWithSameName.joinColumns;
                  }
                  throw new Error("Index " + (_this.givenName ? "\"" + _this.givenName + "\" " : "") + "contains column that is missing in the entity: " + propertyPath);
              })
                  .reduce(function (a, b) { return a.concat(b); });
          }
          this.columnNamesWithOrderingMap = Object.keys(map).reduce(function (updatedMap, key) {
              var column = _this.entityMetadata.columns.find(function (column) { return column.propertyPath === key; });
              if (column)
                  updatedMap[column.databasePath] = map[key];
              return updatedMap;
          }, {});
          this.name = this.givenName ? this.givenName : namingStrategy.indexName(this.entityMetadata.tablePath, this.columns.map(function (column) { return column.databaseName; }), this.where);
          return this;
      };
      return IndexMetadata;
  }());
  export { IndexMetadata };
  
  //# sourceMappingURL=IndexMetadata.js.map
  