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{EntityMetadata} from \"./EntityMetadata\";\nimport {IndexMetadataArgs} from \"../metadata-args/IndexMetadataArgs\";\nimport {NamingStrategyInterface} from \"../naming-strategy/NamingStrategyInterface\";\nimport {ColumnMetadata} from \"./ColumnMetadata\";\nimport {EmbeddedMetadata} from \"./EmbeddedMetadata\";\n\n/**\n * Index metadata contains all information about table's index.\n */\nexport class IndexMetadata {\n\n // ---------------------------------------------------------------------\n // Public Properties\n // ---------------------------------------------------------------------\n\n /**\n * Entity metadata of the class to which this index is applied.\n */\n entityMetadata: EntityMetadata;\n\n /**\n * Embedded metadata if this index was applied on embedded.\n */\n embeddedMetadata?: EmbeddedMetadata;\n\n /**\n * Indicates if this index must be unique.\n */\n isUnique: boolean = false;\n\n /**\n * The SPATIAL modifier indexes the entire column and does not allow indexed columns to contain NULL values.\n * Works only in MySQL.\n */\n isSpatial: boolean = false;\n\n /**\n * The FULLTEXT modifier indexes the entire column and does not allow prefixing.\n * Works only in MySQL.\n */\n isFulltext: boolean = false;\n\n /**\n * Indicates if this index must synchronize with database index.\n */\n synchronize: boolean = true;\n\n /**\n * If true, the index only references documents with the specified field.\n * These indexes use less space but behave differently in some situations (particularly sorts).\n * This option is only supported for mongodb database.\n */\n isSparse?: boolean;\n\n /**\n * Builds the index in the background so that building an index an does not block other database activities.\n * This option is only supported for mongodb database.\n */\n isBackground?: boolean;\n\n /**\n * Specifies a time to live, in seconds.\n * This option is only supported for mongodb database.\n */\n expireAfterSeconds?: number;\n\n /**\n * Target class to which metadata is applied.\n */\n target?: Function|string;\n\n /**\n * Indexed columns.\n */\n columns: ColumnMetadata[] = [];\n\n /**\n * User specified index name.\n */\n givenName?: string;\n\n /**\n * User specified column names.\n */\n givenColumnNames?: ((object?: any) => (any[]|{ [key: string]: number }))|string[];\n\n /**\n * Final index name.\n * If index name was given by a user then it stores normalized (by naming strategy) givenName.\n * If index name was not given then its generated.\n */\n name: string;\n\n /**\n * Index filter condition.\n */\n where?: string;\n\n /**\n * Map of column names with order set.\n * Used only by MongoDB driver.\n */\n columnNamesWithOrderingMap: { [key: string]: number } = {};\n\n // ---------------------------------------------------------------------\n // Constructor\n // ---------------------------------------------------------------------\n\n constructor(options: {\n entityMetadata: EntityMetadata,\n embeddedMetadata?: EmbeddedMetadata,\n columns?: ColumnMetadata[],\n args?: IndexMetadataArgs\n }) {\n this.entityMetadata = options.entityMetadata;\n this.embeddedMetadata = options.embeddedMetadata;\n if (options.columns)\n this.columns = options.columns;\n\n if (options.args) {\n this.target = options.args.target;\n if (options.args.synchronize !== null && options.args.synchronize !== undefined)\n this.synchronize = options.args.synchronize;\n this.isUnique = !!options.args.unique;\n this.isSpatial = !!options.args.spatial;\n this.isFulltext = !!options.args.fulltext;\n this.where = options.args.where;\n this.isSparse = options.args.sparse;\n this.isBackground = options.args.background;\n this.expireAfterSeconds = options.args.expireAfterSeconds;\n this.givenName = options.args.name;\n this.givenColumnNames = options.args.columns;\n }\n }\n\n // ---------------------------------------------------------------------\n // Public Build Methods\n // ---------------------------------------------------------------------\n\n /**\n * Builds some depend index properties.\n * Must be called after all entity metadata's properties map, columns and relations are built.\n */\n build(namingStrategy: NamingStrategyInterface): this {\n if (this.synchronize === false) {\n this.name = this.givenName!;\n return this;\n }\n\n const map: { [key: string]: number } = {};\n\n // if columns already an array of string then simply return it\n if (this.givenColumnNames) {\n let columnPropertyPaths: string[] = [];\n if (this.givenColumnNames instanceof Array) {\n columnPropertyPaths = this.givenColumnNames.map(columnName => {\n if (this.embeddedMetadata)\n return this.embeddedMetadata.propertyPath + \".\" + columnName;\n\n return columnName;\n });\n columnPropertyPaths.forEach(propertyPath => map[propertyPath] = 1);\n } else { // todo: indices in embeds are not implemented in this syntax. deprecate this syntax?\n // if columns is a function that returns array of field names then execute it and get columns names from it\n const columnsFnResult = this.givenColumnNames(this.entityMetadata.propertiesMap);\n if (columnsFnResult instanceof Array) {\n columnPropertyPaths = columnsFnResult.map((i: any) => String(i));\n columnPropertyPaths.forEach(name => map[name] = 1);\n } else {\n columnPropertyPaths = Object.keys(columnsFnResult).map((i: any) => String(i));\n Object.keys(columnsFnResult).forEach(columnName => map[columnName] = columnsFnResult[columnName]);\n }\n }\n\n this.columns = columnPropertyPaths.map(propertyPath => {\n const columnWithSameName = this.entityMetadata.columns.find(column => column.propertyPath === propertyPath);\n if (columnWithSameName) {\n return [columnWithSameName];\n }\n const relationWithSameName = this.entityMetadata.relations.find(relation => relation.isWithJoinColumn && relation.propertyName === propertyPath);\n if (relationWithSameName) {\n return relationWithSameName.joinColumns;\n }\n const indexName = this.givenName ? \"\\\"\" + this.givenName + \"\\\" \" : \"\";\n const entityName = this.entityMetadata.targetName;\n throw new Error(`Index ${indexName}contains column that is missing in the entity (${entityName}): ` + propertyPath);\n })\n .reduce((a, b) => a.concat(b));\n }\n\n this.columnNamesWithOrderingMap = Object.keys(map).reduce((updatedMap, key) => {\n const column = this.entityMetadata.columns.find(column => column.propertyPath === key);\n if (column)\n updatedMap[column.databasePath] = map[key];\n\n return updatedMap;\n }, {} as { [key: string]: number });\n\n this.name = this.givenName ? this.givenName : namingStrategy.indexName(this.entityMetadata.tablePath, this.columns.map(column => column.databaseName), this.where);\n return this;\n }\n\n}\n"],"sourceRoot":".."}
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