apache-arrow
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Apache Arrow columnar in-memory format
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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 * as type from '../type';\nimport { Visitor } from '../visitor';\nimport { ArrowType, Precision, DateUnit, TimeUnit, IntervalUnit, UnionMode } from '../enum';\n\n/** @ignore */\nexport interface JSONTypeAssembler extends Visitor {\n visit<T extends type.DataType>(node: T): object | undefined;\n}\n\n/** @ignore */\nexport class JSONTypeAssembler extends Visitor {\n public visit<T extends type.DataType>(node: T): object | undefined {\n return node == null ? undefined : super.visit(node);\n }\n public visitNull<T extends type.Null>({ typeId }: T) {\n return { 'name': ArrowType[typeId].toLowerCase() };\n }\n public visitInt<T extends type.Int>({ typeId, bitWidth, isSigned }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'bitWidth': bitWidth, 'isSigned': isSigned };\n }\n public visitFloat<T extends type.Float>({ typeId, precision }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'precision': Precision[precision] };\n }\n public visitBinary<T extends type.Binary>({ typeId }: T) {\n return { 'name': ArrowType[typeId].toLowerCase() };\n }\n public visitBool<T extends type.Bool>({ typeId }: T) {\n return { 'name': ArrowType[typeId].toLowerCase() };\n }\n public visitUtf8<T extends type.Utf8>({ typeId }: T) {\n return { 'name': ArrowType[typeId].toLowerCase() };\n }\n public visitDecimal<T extends type.Decimal>({ typeId, scale, precision }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'scale': scale, 'precision': precision };\n }\n public visitDate<T extends type.Date_>({ typeId, unit }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'unit': DateUnit[unit] };\n }\n public visitTime<T extends type.Time>({ typeId, unit, bitWidth }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'unit': TimeUnit[unit], bitWidth };\n }\n public visitTimestamp<T extends type.Timestamp>({ typeId, timezone, unit }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'unit': TimeUnit[unit], timezone };\n }\n public visitInterval<T extends type.Interval>({ typeId, unit }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'unit': IntervalUnit[unit] };\n }\n public visitList<T extends type.List>({ typeId }: T) {\n return { 'name': ArrowType[typeId].toLowerCase() };\n }\n public visitStruct<T extends type.Struct>({ typeId }: T) {\n return { 'name': ArrowType[typeId].toLowerCase() };\n }\n public visitUnion<T extends type.Union>({ typeId, mode, typeIds }: T) {\n return {\n 'name': ArrowType[typeId].toLowerCase(),\n 'mode': UnionMode[mode],\n 'typeIds': [...typeIds]\n };\n }\n public visitDictionary<T extends type.Dictionary>(node: T) {\n return this.visit(node.dictionary);\n }\n public visitFixedSizeBinary<T extends type.FixedSizeBinary>({ typeId, byteWidth }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'byteWidth': byteWidth };\n }\n public visitFixedSizeList<T extends type.FixedSizeList>({ typeId, listSize }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'listSize': listSize };\n }\n public visitMap<T extends type.Map_>({ typeId, keysSorted }: T) {\n return { 'name': ArrowType[typeId].toLowerCase(), 'keysSorted': keysSorted };\n }\n}\n"]}