@tanstack/db-ivm/dist/cjs/operators/filter.cjs.map

Incremental View Maintenance for TanStack DB based on Differential Dataflow

{"version":3,"file":"filter.cjs","sources":["../../../src/operators/filter.ts"],"sourcesContent":["import { DifferenceStreamWriter, LinearUnaryOperator } from \"../graph.js\"\nimport { StreamBuilder } from \"../d2.js\"\nimport type { IStreamBuilder, PipedOperator } from \"../types.js\"\nimport type { DifferenceStreamReader } from \"../graph.js\"\nimport type { MultiSet } from \"../multiset.js\"\n\n/**\n * Operator that filters elements from the input stream\n */\nexport class FilterOperator<T> extends LinearUnaryOperator<T, T> {\n  #f: (data: T) => boolean\n\n  constructor(\n    id: number,\n    inputA: DifferenceStreamReader<T>,\n    output: DifferenceStreamWriter<T>,\n    f: (data: T) => boolean\n  ) {\n    super(id, inputA, output)\n    this.#f = f\n  }\n\n  inner(collection: MultiSet<T>): MultiSet<T> {\n    return collection.filter(this.#f)\n  }\n}\n\n/**\n * Filters elements from the input stream\n * @param f - The predicate to filter elements\n */\nexport function filter<T>(f: (data: T) => boolean): PipedOperator<T, T> {\n  return (stream: IStreamBuilder<T>): IStreamBuilder<T> => {\n    const output = new StreamBuilder<T>(\n      stream.graph,\n      new DifferenceStreamWriter<T>()\n    )\n    const operator = new FilterOperator<T>(\n      stream.graph.getNextOperatorId(),\n      stream.connectReader(),\n      output.writer,\n      f\n    )\n    stream.graph.addOperator(operator)\n    stream.graph.addStream(output.connectReader())\n    return output\n  }\n}\n"],"names":["LinearUnaryOperator","StreamBuilder","DifferenceStreamWriter"],"mappings":";;;;;;;;;;;;AASO,MAAM,uBAA0BA,MAAAA,oBAA0B;AAAA,EAG/D,YACE,IACA,QACA,QACA,GACA;AACA,UAAM,IAAI,QAAQ,MAAM;AAR1B;AASE,uBAAK,IAAK;AAAA,EACZ;AAAA,EAEA,MAAM,YAAsC;AAC1C,WAAO,WAAW,OAAO,mBAAK,GAAE;AAAA,EAClC;AACF;AAfE;AAqBK,SAAS,OAAU,GAA8C;AACtE,SAAO,CAAC,WAAiD;AACvD,UAAM,SAAS,IAAIC,GAAAA;AAAAA,MACjB,OAAO;AAAA,MACP,IAAIC,MAAAA,uBAAA;AAAA,IAA0B;AAEhC,UAAM,WAAW,IAAI;AAAA,MACnB,OAAO,MAAM,kBAAA;AAAA,MACb,OAAO,cAAA;AAAA,MACP,OAAO;AAAA,MACP;AAAA,IAAA;AAEF,WAAO,MAAM,YAAY,QAAQ;AACjC,WAAO,MAAM,UAAU,OAAO,cAAA,CAAe;AAC7C,WAAO;AAAA,EACT;AACF;;;"}