/
get.ts
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/
get.ts
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
import { Data } from '../data';
import { BN } from '../util/bn';
import { Visitor } from '../visitor';
import { decodeUtf8 } from '../util/utf8';
import { VectorType } from '../interfaces';
import { uint16ToFloat64 } from '../util/math';
import { Type, UnionMode, Precision, DateUnit, TimeUnit, IntervalUnit } from '../enum';
import {
DataType, Dictionary,
Bool, Null, Utf8, Binary, Decimal, FixedSizeBinary, List, FixedSizeList, Map_, Struct,
Float, Float16, Float32, Float64,
Int, Uint8, Uint16, Uint32, Uint64, Int8, Int16, Int32, Int64,
Date_, DateDay, DateMillisecond,
Interval, IntervalDayTime, IntervalYearMonth,
Time, TimeSecond, TimeMillisecond, TimeMicrosecond, TimeNanosecond,
Timestamp, TimestampSecond, TimestampMillisecond, TimestampMicrosecond, TimestampNanosecond,
Union, DenseUnion, SparseUnion,
} from '../type';
/** @ignore */
export interface GetVisitor extends Visitor {
visit<T extends VectorType> (node: T, index: number): T['TValue'];
visitMany<T extends VectorType> (nodes: T[], indices: number[]): T['TValue'][];
getVisitFn<T extends Type> (node: T): (vector: VectorType<T>, index: number) => VectorType<T>['TValue'];
getVisitFn<T extends DataType>(node: VectorType<T> | Data<T> | T): (vector: VectorType<T>, index: number) => VectorType<T>['TValue'];
visitNull <T extends Null> (vector: VectorType<T>, index: number): T['TValue'];
visitBool <T extends Bool> (vector: VectorType<T>, index: number): T['TValue'];
visitInt <T extends Int> (vector: VectorType<T>, index: number): T['TValue'];
visitInt8 <T extends Int8> (vector: VectorType<T>, index: number): T['TValue'];
visitInt16 <T extends Int16> (vector: VectorType<T>, index: number): T['TValue'];
visitInt32 <T extends Int32> (vector: VectorType<T>, index: number): T['TValue'];
visitInt64 <T extends Int64> (vector: VectorType<T>, index: number): T['TValue'];
visitUint8 <T extends Uint8> (vector: VectorType<T>, index: number): T['TValue'];
visitUint16 <T extends Uint16> (vector: VectorType<T>, index: number): T['TValue'];
visitUint32 <T extends Uint32> (vector: VectorType<T>, index: number): T['TValue'];
visitUint64 <T extends Uint64> (vector: VectorType<T>, index: number): T['TValue'];
visitFloat <T extends Float> (vector: VectorType<T>, index: number): T['TValue'];
visitFloat16 <T extends Float16> (vector: VectorType<T>, index: number): T['TValue'];
visitFloat32 <T extends Float32> (vector: VectorType<T>, index: number): T['TValue'];
visitFloat64 <T extends Float64> (vector: VectorType<T>, index: number): T['TValue'];
visitUtf8 <T extends Utf8> (vector: VectorType<T>, index: number): T['TValue'];
visitBinary <T extends Binary> (vector: VectorType<T>, index: number): T['TValue'];
visitFixedSizeBinary <T extends FixedSizeBinary> (vector: VectorType<T>, index: number): T['TValue'];
visitDate <T extends Date_> (vector: VectorType<T>, index: number): T['TValue'];
visitDateDay <T extends DateDay> (vector: VectorType<T>, index: number): T['TValue'];
visitDateMillisecond <T extends DateMillisecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTimestamp <T extends Timestamp> (vector: VectorType<T>, index: number): T['TValue'];
visitTimestampSecond <T extends TimestampSecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTimestampMillisecond <T extends TimestampMillisecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTimestampMicrosecond <T extends TimestampMicrosecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTimestampNanosecond <T extends TimestampNanosecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTime <T extends Time> (vector: VectorType<T>, index: number): T['TValue'];
visitTimeSecond <T extends TimeSecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTimeMillisecond <T extends TimeMillisecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTimeMicrosecond <T extends TimeMicrosecond> (vector: VectorType<T>, index: number): T['TValue'];
visitTimeNanosecond <T extends TimeNanosecond> (vector: VectorType<T>, index: number): T['TValue'];
visitDecimal <T extends Decimal> (vector: VectorType<T>, index: number): T['TValue'];
visitList <T extends List> (vector: VectorType<T>, index: number): T['TValue'];
visitStruct <T extends Struct> (vector: VectorType<T>, index: number): T['TValue'];
visitUnion <T extends Union> (vector: VectorType<T>, index: number): T['TValue'];
visitDenseUnion <T extends DenseUnion> (vector: VectorType<T>, index: number): T['TValue'];
visitSparseUnion <T extends SparseUnion> (vector: VectorType<T>, index: number): T['TValue'];
visitDictionary <T extends Dictionary> (vector: VectorType<T>, index: number): T['TValue'];
visitInterval <T extends Interval> (vector: VectorType<T>, index: number): T['TValue'];
visitIntervalDayTime <T extends IntervalDayTime> (vector: VectorType<T>, index: number): T['TValue'];
visitIntervalYearMonth <T extends IntervalYearMonth> (vector: VectorType<T>, index: number): T['TValue'];
visitFixedSizeList <T extends FixedSizeList> (vector: VectorType<T>, index: number): T['TValue'];
visitMap <T extends Map_> (vector: VectorType<T>, index: number): T['TValue'];
}
/** @ignore */
export class GetVisitor extends Visitor {}
/** @ignore */const epochDaysToMs = (data: Int32Array, index: number) => 86400000 * data[index];
/** @ignore */const epochMillisecondsLongToMs = (data: Int32Array, index: number) => 4294967296 * (data[index + 1]) + (data[index] >>> 0);
/** @ignore */const epochMicrosecondsLongToMs = (data: Int32Array, index: number) => 4294967296 * (data[index + 1] / 1000) + ((data[index] >>> 0) / 1000);
/** @ignore */const epochNanosecondsLongToMs = (data: Int32Array, index: number) => 4294967296 * (data[index + 1] / 1000000) + ((data[index] >>> 0) / 1000000);
/** @ignore */const epochMillisecondsToDate = (epochMs: number) => new Date(epochMs);
/** @ignore */const epochDaysToDate = (data: Int32Array, index: number) => epochMillisecondsToDate(epochDaysToMs(data, index));
/** @ignore */const epochMillisecondsLongToDate = (data: Int32Array, index: number) => epochMillisecondsToDate(epochMillisecondsLongToMs(data, index));
/** @ignore */
const getNull = <T extends Null>(_vector: VectorType<T>, _index: number): T['TValue'] => null;
/** @ignore */
const getVariableWidthBytes = (values: Uint8Array, valueOffsets: Int32Array, index: number) => {
const { [index]: x, [index + 1]: y } = valueOffsets;
return x != null && y != null ? values.subarray(x, y) : null as any;
};
/** @ignore */
const getBool = <T extends Bool>({ offset, values }: VectorType<T>, index: number): T['TValue'] => {
const idx = offset + index;
const byte = values[idx >> 3];
return (byte & 1 << (idx % 8)) !== 0;
};
/** @ignore */
type Numeric1X = Int8 | Int16 | Int32 | Uint8 | Uint16 | Uint32 | Float32 | Float64;
/** @ignore */
type Numeric2X = Int64 | Uint64;
/** @ignore */
const getDateDay = <T extends DateDay> ({ values }: VectorType<T>, index: number): T['TValue'] => epochDaysToDate(values, index);
/** @ignore */
const getDateMillisecond = <T extends DateMillisecond>({ values }: VectorType<T>, index: number): T['TValue'] => epochMillisecondsLongToDate(values, index * 2);
/** @ignore */
const getNumeric = <T extends Numeric1X> ({ stride, values }: VectorType<T>, index: number): T['TValue'] => values[stride * index];
/** @ignore */
const getFloat16 = <T extends Float16> ({ stride, values }: VectorType<T>, index: number): T['TValue'] => uint16ToFloat64(values[stride * index]);
/** @ignore */
const getBigInts = <T extends Numeric2X>({ stride, values, type }: VectorType<T>, index: number): T['TValue'] => <any> BN.new(values.subarray(stride * index, stride * (index + 1)), type.isSigned);
/** @ignore */
const getFixedSizeBinary = <T extends FixedSizeBinary>({ stride, values }: VectorType<T>, index: number): T['TValue'] => values.subarray(stride * index, stride * (index + 1));
/** @ignore */
const getBinary = <T extends Binary>({ values, valueOffsets }: VectorType<T>, index: number): T['TValue'] => getVariableWidthBytes(values, valueOffsets, index);
/** @ignore */
const getUtf8 = <T extends Utf8>({ values, valueOffsets }: VectorType<T>, index: number): T['TValue'] => {
const bytes = getVariableWidthBytes(values, valueOffsets, index);
return bytes !== null ? decodeUtf8(bytes) : null as any;
};
/* istanbul ignore next */
/** @ignore */
const getInt = <T extends Int>(vector: VectorType<T>, index: number): T['TValue'] => (
vector.type.bitWidth < 64
? getNumeric(vector as VectorType<Numeric1X>, index)
: getBigInts(vector as VectorType<Numeric2X>, index)
);
/* istanbul ignore next */
/** @ignore */
const getFloat = <T extends Float> (vector: VectorType<T>, index: number): T['TValue'] => (
vector.type.precision !== Precision.HALF
? getNumeric(vector as VectorType<Numeric1X>, index)
: getFloat16(vector as VectorType<Float16>, index)
);
/* istanbul ignore next */
/** @ignore */
const getDate = <T extends Date_> (vector: VectorType<T>, index: number): T['TValue'] => (
vector.type.unit === DateUnit.DAY
? getDateDay(vector as VectorType<DateDay>, index)
: getDateMillisecond(vector as VectorType<DateMillisecond>, index)
);
/** @ignore */
const getTimestampSecond = <T extends TimestampSecond> ({ values }: VectorType<T>, index: number): T['TValue'] => 1000 * epochMillisecondsLongToMs(values, index * 2);
/** @ignore */
const getTimestampMillisecond = <T extends TimestampMillisecond>({ values }: VectorType<T>, index: number): T['TValue'] => epochMillisecondsLongToMs(values, index * 2);
/** @ignore */
const getTimestampMicrosecond = <T extends TimestampMicrosecond>({ values }: VectorType<T>, index: number): T['TValue'] => epochMicrosecondsLongToMs(values, index * 2);
/** @ignore */
const getTimestampNanosecond = <T extends TimestampNanosecond> ({ values }: VectorType<T>, index: number): T['TValue'] => epochNanosecondsLongToMs(values, index * 2);
/* istanbul ignore next */
/** @ignore */
const getTimestamp = <T extends Timestamp>(vector: VectorType<T>, index: number): T['TValue'] => {
switch (vector.type.unit) {
case TimeUnit.SECOND: return getTimestampSecond(vector as VectorType<TimestampSecond>, index);
case TimeUnit.MILLISECOND: return getTimestampMillisecond(vector as VectorType<TimestampMillisecond>, index);
case TimeUnit.MICROSECOND: return getTimestampMicrosecond(vector as VectorType<TimestampMicrosecond>, index);
case TimeUnit.NANOSECOND: return getTimestampNanosecond(vector as VectorType<TimestampNanosecond>, index);
}
};
/** @ignore */
const getTimeSecond = <T extends TimeSecond> ({ values, stride }: VectorType<T>, index: number): T['TValue'] => values[stride * index];
/** @ignore */
const getTimeMillisecond = <T extends TimeMillisecond>({ values, stride }: VectorType<T>, index: number): T['TValue'] => values[stride * index];
/** @ignore */
const getTimeMicrosecond = <T extends TimeMicrosecond>({ values }: VectorType<T>, index: number): T['TValue'] => BN.signed(values.subarray(2 * index, 2 * (index + 1)));
/** @ignore */
const getTimeNanosecond = <T extends TimeNanosecond> ({ values }: VectorType<T>, index: number): T['TValue'] => BN.signed(values.subarray(2 * index, 2 * (index + 1)));
/* istanbul ignore next */
/** @ignore */
const getTime = <T extends Time>(vector: VectorType<T>, index: number): T['TValue'] => {
switch (vector.type.unit) {
case TimeUnit.SECOND: return getTimeSecond(vector as VectorType<TimeSecond>, index);
case TimeUnit.MILLISECOND: return getTimeMillisecond(vector as VectorType<TimeMillisecond>, index);
case TimeUnit.MICROSECOND: return getTimeMicrosecond(vector as VectorType<TimeMicrosecond>, index);
case TimeUnit.NANOSECOND: return getTimeNanosecond(vector as VectorType<TimeNanosecond>, index);
}
};
/** @ignore */
const getDecimal = <T extends Decimal>({ values }: VectorType<T>, index: number): T['TValue'] => BN.decimal(values.subarray(4 * index, 4 * (index + 1)));
/** @ignore */
const getList = <T extends List>(vector: VectorType<T>, index: number): T['TValue'] => {
const child = vector.getChildAt(0)!, { valueOffsets, stride } = vector;
return child.slice(valueOffsets[index * stride], valueOffsets[(index * stride) + 1]) as T['TValue'];
};
/** @ignore */
const getMap = <T extends Map_>(vector: VectorType<T>, index: number): T['TValue'] => {
return vector.bind(index) as T['TValue'];
};
/** @ignore */
const getStruct = <T extends Struct>(vector: VectorType<T>, index: number): T['TValue'] => {
return vector.bind(index) as T['TValue'];
};
/* istanbul ignore next */
/** @ignore */
const getUnion = <
V extends VectorType<Union> | VectorType<DenseUnion> | VectorType<SparseUnion>
>(vector: V, index: number): V['TValue'] => {
return vector.type.mode === UnionMode.Dense ?
getDenseUnion(vector as VectorType<DenseUnion>, index) :
getSparseUnion(vector as VectorType<SparseUnion>, index);
};
/** @ignore */
const getDenseUnion = <T extends DenseUnion>(vector: VectorType<T>, index: number): T['TValue'] => {
const childIndex = vector.typeIdToChildIndex[vector.typeIds[index]];
const child = vector.getChildAt(childIndex);
return child ? child.get(vector.valueOffsets[index]) : null;
};
/** @ignore */
const getSparseUnion = <T extends SparseUnion>(vector: VectorType<T>, index: number): T['TValue'] => {
const childIndex = vector.typeIdToChildIndex[vector.typeIds[index]];
const child = vector.getChildAt(childIndex);
return child ? child.get(index) : null;
};
/** @ignore */
const getDictionary = <T extends Dictionary>(vector: VectorType<T>, index: number): T['TValue'] => {
return vector.getValue(vector.getKey(index)!);
};
/* istanbul ignore next */
/** @ignore */
const getInterval = <T extends Interval>(vector: VectorType<T>, index: number): T['TValue'] =>
(vector.type.unit === IntervalUnit.DAY_TIME)
? getIntervalDayTime(vector as VectorType<IntervalDayTime>, index)
: getIntervalYearMonth(vector as VectorType<IntervalYearMonth>, index);
/** @ignore */
const getIntervalDayTime = <T extends IntervalDayTime>({ values }: VectorType<T>, index: number): T['TValue'] => values.subarray(2 * index, 2 * (index + 1));
/** @ignore */
const getIntervalYearMonth = <T extends IntervalYearMonth>({ values }: VectorType<T>, index: number): T['TValue'] => {
const interval = values[index];
const int32s = new Int32Array(2);
int32s[0] = interval / 12 | 0; /* years */
int32s[1] = interval % 12 | 0; /* months */
return int32s;
};
/** @ignore */
const getFixedSizeList = <T extends FixedSizeList>(vector: VectorType<T>, index: number): T['TValue'] => {
const child = vector.getChildAt(0)!, { stride } = vector;
return child.slice(index * stride, (index + 1) * stride) as T['TValue'];
};
GetVisitor.prototype.visitNull = getNull;
GetVisitor.prototype.visitBool = getBool;
GetVisitor.prototype.visitInt = getInt;
GetVisitor.prototype.visitInt8 = getNumeric;
GetVisitor.prototype.visitInt16 = getNumeric;
GetVisitor.prototype.visitInt32 = getNumeric;
GetVisitor.prototype.visitInt64 = getBigInts;
GetVisitor.prototype.visitUint8 = getNumeric;
GetVisitor.prototype.visitUint16 = getNumeric;
GetVisitor.prototype.visitUint32 = getNumeric;
GetVisitor.prototype.visitUint64 = getBigInts;
GetVisitor.prototype.visitFloat = getFloat;
GetVisitor.prototype.visitFloat16 = getFloat16;
GetVisitor.prototype.visitFloat32 = getNumeric;
GetVisitor.prototype.visitFloat64 = getNumeric;
GetVisitor.prototype.visitUtf8 = getUtf8;
GetVisitor.prototype.visitBinary = getBinary;
GetVisitor.prototype.visitFixedSizeBinary = getFixedSizeBinary;
GetVisitor.prototype.visitDate = getDate;
GetVisitor.prototype.visitDateDay = getDateDay;
GetVisitor.prototype.visitDateMillisecond = getDateMillisecond;
GetVisitor.prototype.visitTimestamp = getTimestamp;
GetVisitor.prototype.visitTimestampSecond = getTimestampSecond;
GetVisitor.prototype.visitTimestampMillisecond = getTimestampMillisecond;
GetVisitor.prototype.visitTimestampMicrosecond = getTimestampMicrosecond;
GetVisitor.prototype.visitTimestampNanosecond = getTimestampNanosecond;
GetVisitor.prototype.visitTime = getTime;
GetVisitor.prototype.visitTimeSecond = getTimeSecond;
GetVisitor.prototype.visitTimeMillisecond = getTimeMillisecond;
GetVisitor.prototype.visitTimeMicrosecond = getTimeMicrosecond;
GetVisitor.prototype.visitTimeNanosecond = getTimeNanosecond;
GetVisitor.prototype.visitDecimal = getDecimal;
GetVisitor.prototype.visitList = getList;
GetVisitor.prototype.visitStruct = getStruct;
GetVisitor.prototype.visitUnion = getUnion;
GetVisitor.prototype.visitDenseUnion = getDenseUnion;
GetVisitor.prototype.visitSparseUnion = getSparseUnion;
GetVisitor.prototype.visitDictionary = getDictionary;
GetVisitor.prototype.visitInterval = getInterval;
GetVisitor.prototype.visitIntervalDayTime = getIntervalDayTime;
GetVisitor.prototype.visitIntervalYearMonth = getIntervalYearMonth;
GetVisitor.prototype.visitFixedSizeList = getFixedSizeList;
GetVisitor.prototype.visitMap = getMap;
/** @ignore */
export const instance = new GetVisitor();