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1 | // Licensed to the Apache Software Foundation (ASF) under one |
2 | // or more contributor license agreements. See the NOTICE file | |
3 | // distributed with this work for additional information | |
4 | // regarding copyright ownership. The ASF licenses this file | |
5 | // to you under the Apache License, Version 2.0 (the | |
6 | // "License"); you may not use this file except in compliance | |
7 | // with the License. You may obtain a copy of the License at | |
8 | // | |
9 | // http://www.apache.org/licenses/LICENSE-2.0 | |
10 | // | |
11 | // Unless required by applicable law or agreed to in writing, | |
12 | // software distributed under the License is distributed on an | |
13 | // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
14 | // KIND, either express or implied. See the License for the | |
15 | // specific language governing permissions and limitations | |
16 | // under the License. | |
17 | ||
18 | import { MapRow } from './row'; | |
19 | import { Field } from '../schema'; | |
20 | import { Vector } from '../vector'; | |
21 | import { BaseVector } from './base'; | |
22 | import { DataType, Map_, Struct, List } from '../type'; | |
23 | ||
24 | /** @ignore */ | |
25 | export class MapVector<K extends DataType = any, V extends DataType = any> extends BaseVector<Map_<K, V>> { | |
26 | public asList() { | |
27 | const child = this.type.children[0] as Field<Struct<{ key: K; value: V }>>; | |
28 | return Vector.new(this.data.clone(new List<Struct<{ key: K; value: V }>>(child))); | |
29 | } | |
30 | public bind(index: number): Map_<K, V>['TValue'] { | |
31 | const child = this.getChildAt<Struct<{ key: K; value: V }>>(0)!; | |
32 | const { [index]: begin, [index + 1]: end } = this.valueOffsets; | |
33 | return new MapRow(child.slice(begin, end)); | |
34 | } | |
35 | } |