-
Notifications
You must be signed in to change notification settings - Fork 93
/
DataConverter.scala
68 lines (60 loc) · 2.11 KB
/
DataConverter.scala
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
/*
* Copyright 2019 ABSA Group Limited
*
* Licensed 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.
*/
package za.co.absa.spline.harvester.converter
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.util.{ArrayData, MapData}
import org.apache.spark.sql.types.{ArrayType, DataType, MapType, StructType}
import za.co.absa.spline.commons.lang.Converter
import za.co.absa.spline.commons.lang.extensions.TraversableExtension._
class DataConverter
extends Converter {
override type From = (Any, DataType)
override type To = Any
private val renderer = ValueDecomposer.addHandler(recursion => {
case (row: InternalRow, rowType: StructType) =>
val rowItems = row.toSeq(rowType)
assert(rowItems.length == rowType.length)
rowItems
.zip(rowType)
.map({ case (item, field) => recursion(item, field.dataType).orNull })
.toNonEmptyOption
case (md: MapData, MapType(keyType, valueType, _)) =>
val keys = md
.keyArray
.toArray[Any](keyType)
.map(_.toString)
val values = md
.valueArray
.toArray[Any](valueType)
.map(recursion(_, valueType).orNull)
keys
.zip(values)
.toMap
.toNonEmptyOption
case (ad: ArrayData, ArrayType(elemType, _)) =>
ad
.toArray[Any](elemType)
.map(elem => {
val maybeValue = recursion(elem, elemType)
maybeValue.orNull
})
.toSeq
.toNonEmptyOption
})
override def convert(internalDataWithType: From): To = internalDataWithType match {
case (v, t) => renderer.decompose(v, t).orNull
}
}