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See the NOTICE file\n// distributed with this work for additional information\n// regarding copyright ownership. The ASF licenses this file\n// to you under the Apache License, Version 2.0 (the\n// \"License\"); you may not use this file except in compliance\n// with the License. You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing,\n// software distributed under the License is distributed on an\n// \"AS IS\" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\n// KIND, either express or implied. See the License for the\n// specific language governing permissions and limitations\n// under the License.\n\nimport { Data } from './data';\nimport { Field } from './schema';\nimport { DataType } from './type';\nimport { Vector } from './vector';\nimport { Clonable, Sliceable, Applicative } from './vector';\nimport { VectorCtorArgs, VectorType as V } from './interfaces';\nimport { Chunked, SearchContinuation } from './vector/chunked';\n\nexport interface Column<T extends DataType = any> {\n typeId: T['TType'];\n concat(...others: Vector<T>[]): Column<T>;\n slice(begin?: number, end?: number): Column<T>;\n clone(chunks?: Vector<T>[], offsets?: Uint32Array): Column<T>;\n}\n\nexport class Column<T extends DataType = any>\n extends Chunked<T>\n implements Clonable<Column<T>>,\n Sliceable<Column<T>>,\n Applicative<T, Column<T>> {\n\n public static new<T extends DataType>(field: string | Field<T>, ...chunks: (Vector<T> | Vector<T>[])[]): Column<T>;\n public static new<T extends DataType>(field: string | Field<T>, data: Data<T>, ...args: VectorCtorArgs<V<T>>): Column<T>;\n /** @nocollapse */\n public static new<T extends DataType = any>(field: string | Field<T>, data: Data<T> | Vector<T> | (Data<T> | Vector<T>)[], ...rest: any[]) {\n\n const chunks = Chunked.flatten<T>(\n Array.isArray(data) ? [...data, ...rest] :\n data instanceof Vector ? [data, ...rest] :\n [Vector.new(data, ...rest)]\n );\n\n if (typeof field === 'string') {\n const type = chunks[0].data.type;\n field = new Field(field, type, true);\n } else if (!field.nullable && chunks.some(({ nullCount }) => nullCount > 0)) {\n field = field.clone({ nullable: true });\n }\n return new Column(field, chunks);\n }\n\n constructor(field: Field<T>, vectors: Vector<T>[] = [], offsets?: Uint32Array) {\n vectors = Chunked.flatten<T>(...vectors);\n super(field.type, vectors, offsets);\n this._field = field;\n if (vectors.length === 1 && !(this instanceof SingleChunkColumn)) {\n return new SingleChunkColumn(field, vectors[0], this._chunkOffsets);\n }\n }\n\n protected _field: Field<T>;\n protected _children?: Column[];\n\n public get field() { return this._field; }\n public get name() { return this._field.name; }\n public get nullable() { return this._field.nullable; }\n public get metadata() { return this._field.metadata; }\n\n public clone(chunks = this._chunks) {\n return new Column(this._field, chunks);\n }\n\n public getChildAt<R extends DataType = any>(index: number): Column<R> | null {\n\n if (index < 0 || index >= this.numChildren) { return null; }\n\n let columns = this._children || (this._children = []);\n let column: Column<R>, field: Field<R>, chunks: Vector<R>[];\n\n if (column = columns[index]) { return column; }\n if (field = ((this.type.children || [])[index] as Field<R>)) {\n chunks = this._chunks\n .map((vector) => vector.getChildAt<R>(index))\n .filter((vec): vec is Vector<R> => vec != null);\n if (chunks.length > 0) {\n return (columns[index] = new Column<R>(field, chunks));\n }\n }\n\n return null;\n }\n}\n\n/** @ignore */\nclass SingleChunkColumn<T extends DataType = any> extends Column<T> {\n protected _chunk: Vector<T>;\n constructor(field: Field<T>, vector: Vector<T>, offsets?: Uint32Array) {\n super(field, [vector], offsets);\n this._chunk = vector;\n }\n public search(index: number): [number, number] | null;\n public search<N extends SearchContinuation<Chunked<T>>>(index: number, then?: N): ReturnType<N>;\n public search<N extends SearchContinuation<Chunked<T>>>(index: number, then?: N) {\n return then ? then(this, 0, index) : [0, index];\n }\n public isValid(index: number): boolean {\n return this._chunk.isValid(index);\n }\n public get(index: number): T['TValue'] | null {\n return this._chunk.get(index);\n }\n public set(index: number, value: T['TValue'] | null): void {\n this._chunk.set(index, value);\n }\n public indexOf(element: T['TValue'], offset?: number): number {\n return this._chunk.indexOf(element, offset);\n }\n}\n"]} |