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kotlinx.serialization.csv.encode.RootCsvEncoder.kt Maven / Gradle / Ivy
package kotlinx.serialization.csv.encode
import kotlinx.serialization.ExperimentalSerializationApi
import kotlinx.serialization.csv.Csv
import kotlinx.serialization.descriptors.SerialDescriptor
import kotlinx.serialization.descriptors.StructureKind
import kotlinx.serialization.encoding.CompositeEncoder
/**
* Initial entry point for encoding.
*
* This root encoder handles the case that the first level is a list
* (which is interpreted as multiple CSV records/lines). If this is the case, encoding continues in
* [RecordListCsvEncoder].
*/
@OptIn(ExperimentalSerializationApi::class)
internal class RootCsvEncoder(
csv: Csv,
writer: CsvWriter
) : CsvEncoder(csv, writer, null) {
internal constructor(csv: Csv, output: Appendable) :
this(csv, CsvWriter(output, csv.config))
override fun beginCollection(
descriptor: SerialDescriptor,
collectionSize: Int
): CompositeEncoder {
return if (descriptor.kind == StructureKind.LIST) {
RecordListCsvEncoder(csv, writer)
} else {
super.beginCollection(descriptor, collectionSize)
}
}
override fun beginStructure(
descriptor: SerialDescriptor
): CompositeEncoder {
if (config.hasHeaderRecord && writer.isFirstRecord) {
printHeaderRecord(descriptor)
}
writer.beginRecord()
return super.beginStructure(descriptor)
}
override fun endChildStructure(descriptor: SerialDescriptor) {
writer.endRecord()
}
override fun encodeColumn(value: String, isNumeric: Boolean, isNull: Boolean) {
writer.beginRecord()
super.encodeColumn(value, isNumeric, isNull)
writer.endRecord()
}
}
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