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Licensed to the Apache Software Foundation (ASF) under one\n// or more contributor license agreements. 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 { Column } from '../column';\nimport { Vector } from '../vector';\nimport { DataType } from '../type';\nimport { Chunked } from '../vector/chunked';\n\ntype RecordBatchCtor = typeof import('../recordbatch').RecordBatch;\n\nconst isArray = Array.isArray;\n\n/** @ignore */\nexport const selectArgs = <T>(Ctor: any, vals: any[]) => _selectArgs(Ctor, vals, [], 0) as T[];\n/** @ignore */\nexport const selectColumnArgs = <T extends { [key: string]: DataType }>(args: any[]) => {\n const [fields, values] = _selectFieldArgs<T>(args, [[], []]);\n return values.map((x, i) =>\n x instanceof Column ? Column.new(x.field.clone(fields[i]), x) :\n x instanceof Vector ? Column.new(fields[i], x) as Column<T[keyof T]> :\n Column.new(fields[i], [] as Vector<T[keyof T]>[]));\n};\n\n/** @ignore */\nexport const selectFieldArgs = <T extends { [key: string]: DataType }>(args: any[]) => _selectFieldArgs<T>(args, [[], []]);\n/** @ignore */\nexport const selectChunkArgs = <T>(Ctor: any, vals: any[]) => _selectChunkArgs(Ctor, vals, [], 0) as T[];\n/** @ignore */\nexport const selectVectorChildrenArgs = <T extends Vector>(Ctor: RecordBatchCtor, vals: any[]) => _selectVectorChildrenArgs(Ctor, vals, [], 0) as T[];\n/** @ignore */\nexport const selectColumnChildrenArgs = <T extends Column>(Ctor: RecordBatchCtor, vals: any[]) => _selectColumnChildrenArgs(Ctor, vals, [], 0) as T[];\n\n/** @ignore */\nfunction _selectArgs<T>(Ctor: any, vals: any[], res: T[], idx: number) {\n let value: any, j = idx;\n let i = -1, n = vals.length;\n while (++i < n) {\n if (isArray(value = vals[i])) {\n j = _selectArgs(Ctor, value, res, j).length;\n } else if (value instanceof Ctor) { res[j++] = value; }\n }\n return res;\n}\n\n/** @ignore */\nfunction _selectChunkArgs<T>(Ctor: any, vals: any[], res: T[], idx: number) {\n let value: any, j = idx;\n let i = -1, n = vals.length;\n while (++i < n) {\n if (isArray(value = vals[i])) {\n j = _selectChunkArgs(Ctor, value, res, j).length;\n } else if (value instanceof Chunked) {\n j = _selectChunkArgs(Ctor, value.chunks, res, j).length;\n } else if (value instanceof Ctor) { res[j++] = value; }\n }\n return res;\n}\n\n/** @ignore */\nfunction _selectVectorChildrenArgs<T extends Vector>(Ctor: RecordBatchCtor, vals: any[], res: T[], idx: number) {\n let value: any, j = idx;\n let i = -1, n = vals.length;\n while (++i < n) {\n if (isArray(value = vals[i])) {\n j = _selectVectorChildrenArgs(Ctor, value, res, j).length;\n } else if (value instanceof Ctor) {\n j = _selectArgs(Vector, value.schema.fields.map((_, i) => value.getChildAt(i)!), res, j).length;\n } else if (value instanceof Vector) { res[j++] = value as T; }\n }\n return res;\n}\n\n/** @ignore */\nfunction _selectColumnChildrenArgs<T extends Column>(Ctor: RecordBatchCtor, vals: any[], res: T[], idx: number) {\n let value: any, j = idx;\n let i = -1, n = vals.length;\n while (++i < n) {\n if (isArray(value = vals[i])) {\n j = _selectColumnChildrenArgs(Ctor, value, res, j).length;\n } else if (value instanceof Ctor) {\n j = _selectArgs(Column, value.schema.fields.map((f, i) => Column.new(f, value.getChildAt(i)!)), res, j).length;\n } else if (value instanceof Column) { res[j++] = value as T; }\n }\n return res;\n}\n\n/** @ignore */\nconst toKeysAndValues = (xs: [any[], any[]], [k, v]: [any, any], i: number) => (xs[0][i] = k, xs[1][i] = v, xs);\n\n/** @ignore */\nfunction _selectFieldArgs<T extends { [key: string]: DataType }>(vals: any[], ret: [Field<T[keyof T]>[], Vector<T[keyof T]>[]]): [Field<T[keyof T]>[], (T[keyof T] | Vector<T[keyof T]>)[]] {\n let keys: any[], n: number;\n switch (n = vals.length) {\n case 0: return ret;\n case 1:\n keys = ret[0];\n if (!(vals[0])) { return ret; }\n if (isArray(vals[0])) { return _selectFieldArgs(vals[0], ret); }\n if (!(vals[0] instanceof Data || vals[0] instanceof Vector || vals[0] instanceof DataType)) {\n [keys, vals] = Object.entries(vals[0]).reduce(toKeysAndValues, ret);\n }\n break;\n default:\n !isArray(keys = vals[n - 1])\n ? (vals = isArray(vals[0]) ? vals[0] : vals, keys = [])\n : (vals = isArray(vals[0]) ? vals[0] : vals.slice(0, n - 1));\n }\n\n let fieldIndex = -1;\n let valueIndex = -1;\n let idx = -1, len = vals.length;\n let field: number | string | Field<T[keyof T]>;\n let val: Vector<T[keyof T]> | Data<T[keyof T]>;\n let [fields, values] = ret as [Field<T[keyof T]>[], any[]];\n\n while (++idx < len) {\n val = vals[idx];\n if (val instanceof Column && (values[++valueIndex] = val)) {\n fields[++fieldIndex] = val.field.clone(keys[idx], val.type, true);\n } else {\n ({ [idx]: field = idx } = keys);\n if (val instanceof DataType && (values[++valueIndex] = val)) {\n fields[++fieldIndex] = Field.new(field, val as DataType, true) as Field<T[keyof T]>;\n } else if (val && val.type && (values[++valueIndex] = val)) {\n val instanceof Data && (values[valueIndex] = val = Vector.new(val) as Vector);\n fields[++fieldIndex] = Field.new(field, val.type, true) as Field<T[keyof T]>;\n }\n }\n }\n return ret;\n}\n"]} |