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184 lines (170 loc) · 10.2 KB
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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 { Vector } from '../vector.js';
import { Visitor } from '../visitor.js';
import { Type, Precision } from '../enum.js';
import { TypeToDataType } from '../interfaces.js';
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.js';
import { ChunkedIterator } from '../util/chunk.js';
/** @ignore */
export interface IteratorVisitor extends Visitor {
visit<T extends Vector>(node: T): IterableIterator<T['TValue'] | null>;
visitMany<T extends Vector>(nodes: T[]): IterableIterator<T['TValue'] | null>[];
getVisitFn<T extends DataType>(node: Vector<T> | T): (vector: Vector<T>) => IterableIterator<T['TValue'] | null>;
getVisitFn<T extends Type>(node: T): (vector: Vector<TypeToDataType<T>>) => IterableIterator<TypeToDataType<T>['TValue'] | null>;
visitNull<T extends Null>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitBool<T extends Bool>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitInt<T extends Int>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitInt8<T extends Int8>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitInt16<T extends Int16>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitInt32<T extends Int32>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitInt64<T extends Int64>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitUint8<T extends Uint8>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitUint16<T extends Uint16>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitUint32<T extends Uint32>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitUint64<T extends Uint64>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitFloat<T extends Float>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitFloat16<T extends Float16>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitFloat32<T extends Float32>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitFloat64<T extends Float64>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitUtf8<T extends Utf8>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitBinary<T extends Binary>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitFixedSizeBinary<T extends FixedSizeBinary>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitDate<T extends Date_>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitDateDay<T extends DateDay>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitDateMillisecond<T extends DateMillisecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimestamp<T extends Timestamp>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimestampSecond<T extends TimestampSecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimestampMillisecond<T extends TimestampMillisecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimestampMicrosecond<T extends TimestampMicrosecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimestampNanosecond<T extends TimestampNanosecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTime<T extends Time>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimeSecond<T extends TimeSecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimeMillisecond<T extends TimeMillisecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimeMicrosecond<T extends TimeMicrosecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitTimeNanosecond<T extends TimeNanosecond>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitDecimal<T extends Decimal>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitList<T extends List>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitStruct<T extends Struct>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitUnion<T extends Union>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitDenseUnion<T extends DenseUnion>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitSparseUnion<T extends SparseUnion>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitDictionary<T extends Dictionary>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitInterval<T extends Interval>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitIntervalDayTime<T extends IntervalDayTime>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitIntervalYearMonth<T extends IntervalYearMonth>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitFixedSizeList<T extends FixedSizeList>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
visitMap<T extends Map_>(vector: Vector<T>): IterableIterator<T['TValue'] | null>;
}
/** @ignore */
export class IteratorVisitor extends Visitor { }
/** @ignore */
function vectorIterator<T extends DataType>(vector: Vector<T>): IterableIterator<T['TValue'] | null> {
const { type } = vector;
// Fast case, defer to native iterators if possible
if (vector.nullCount === 0 && vector.stride === 1 && (
(type.typeId === Type.Timestamp) ||
(type instanceof Int && (type as Int).bitWidth !== 64) ||
(type instanceof Time && (type as Time).bitWidth !== 64) ||
(type instanceof Float && (type as Float).precision !== Precision.HALF)
)) {
return new ChunkedIterator(vector.data.length, (chunkIndex) => {
const data = vector.data[chunkIndex];
return data.values.subarray(0, data.length)[Symbol.iterator]();
});
}
// Otherwise, iterate manually
let offset = 0;
return new ChunkedIterator(vector.data.length, (chunkIndex) => {
const data = vector.data[chunkIndex];
const length = data.length;
const inner = vector.slice(offset, offset + length);
offset += length;
return new VectorIterator(inner);
});
}
/** @ignore */
class VectorIterator<T extends DataType> implements IterableIterator<T['TValue'] | null> {
private index = 0;
constructor(private vector: Vector<T>) { }
next(): IteratorResult<T['TValue'] | null> {
if (this.index < this.vector.length) {
return {
value: this.vector.get(this.index++)
};
}
return { done: true, value: null };
}
[Symbol.iterator]() {
return this;
}
}
IteratorVisitor.prototype.visitNull = vectorIterator;
IteratorVisitor.prototype.visitBool = vectorIterator;
IteratorVisitor.prototype.visitInt = vectorIterator;
IteratorVisitor.prototype.visitInt8 = vectorIterator;
IteratorVisitor.prototype.visitInt16 = vectorIterator;
IteratorVisitor.prototype.visitInt32 = vectorIterator;
IteratorVisitor.prototype.visitInt64 = vectorIterator;
IteratorVisitor.prototype.visitUint8 = vectorIterator;
IteratorVisitor.prototype.visitUint16 = vectorIterator;
IteratorVisitor.prototype.visitUint32 = vectorIterator;
IteratorVisitor.prototype.visitUint64 = vectorIterator;
IteratorVisitor.prototype.visitFloat = vectorIterator;
IteratorVisitor.prototype.visitFloat16 = vectorIterator;
IteratorVisitor.prototype.visitFloat32 = vectorIterator;
IteratorVisitor.prototype.visitFloat64 = vectorIterator;
IteratorVisitor.prototype.visitUtf8 = vectorIterator;
IteratorVisitor.prototype.visitBinary = vectorIterator;
IteratorVisitor.prototype.visitFixedSizeBinary = vectorIterator;
IteratorVisitor.prototype.visitDate = vectorIterator;
IteratorVisitor.prototype.visitDateDay = vectorIterator;
IteratorVisitor.prototype.visitDateMillisecond = vectorIterator;
IteratorVisitor.prototype.visitTimestamp = vectorIterator;
IteratorVisitor.prototype.visitTimestampSecond = vectorIterator;
IteratorVisitor.prototype.visitTimestampMillisecond = vectorIterator;
IteratorVisitor.prototype.visitTimestampMicrosecond = vectorIterator;
IteratorVisitor.prototype.visitTimestampNanosecond = vectorIterator;
IteratorVisitor.prototype.visitTime = vectorIterator;
IteratorVisitor.prototype.visitTimeSecond = vectorIterator;
IteratorVisitor.prototype.visitTimeMillisecond = vectorIterator;
IteratorVisitor.prototype.visitTimeMicrosecond = vectorIterator;
IteratorVisitor.prototype.visitTimeNanosecond = vectorIterator;
IteratorVisitor.prototype.visitDecimal = vectorIterator;
IteratorVisitor.prototype.visitList = vectorIterator;
IteratorVisitor.prototype.visitStruct = vectorIterator;
IteratorVisitor.prototype.visitUnion = vectorIterator;
IteratorVisitor.prototype.visitDenseUnion = vectorIterator;
IteratorVisitor.prototype.visitSparseUnion = vectorIterator;
IteratorVisitor.prototype.visitDictionary = vectorIterator;
IteratorVisitor.prototype.visitInterval = vectorIterator;
IteratorVisitor.prototype.visitIntervalDayTime = vectorIterator;
IteratorVisitor.prototype.visitIntervalYearMonth = vectorIterator;
IteratorVisitor.prototype.visitFixedSizeList = vectorIterator;
IteratorVisitor.prototype.visitMap = vectorIterator;
/** @ignore */
export const instance = new IteratorVisitor();