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Minor fix to multipart envelope

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This commit is contained in:
Alexander Nozik 2019-11-05 21:42:29 +03:00
parent 5265c0e5ab
commit ff59c14c17
1 changed files with 8 additions and 2 deletions
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10
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/EnvelopeParts.kt
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@ -17,6 +17,9 @@ object EnvelopeParts {
const val PARTS_DATA_TYPE = "envelope.parts"
}
/**
* Append multiple serialized envelopes to the data block. Previous data is erased if it was present
*/
fun EnvelopeBuilder.parts(formatFactory: EnvelopeFormatFactory, envelopes: Collection<Envelope>) {
dataType = PARTS_DATA_TYPE
meta {
@ -36,7 +39,10 @@ fun EnvelopeBuilder.parts(formatFactory: EnvelopeFormatFactory, envelopes: Colle
fun EnvelopeBuilder.parts(formatFactory: EnvelopeFormatFactory, builder: suspend SequenceScope<Envelope>.() -> Unit) =
parts(formatFactory, sequence(builder).toList())
fun Envelope.parts(io: IOPlugin = Global.plugins.fetch(IOPlugin)): Sequence<Envelope> {
/**
* If given envelope supports multipart data, return a sequence of those parts (could be empty). Otherwise return null.
*/
fun Envelope.parts(io: IOPlugin = Global.plugins.fetch(IOPlugin)): Sequence<Envelope>? {
return when (dataType) {
PARTS_DATA_TYPE -> {
val size = meta[SIZE_KEY].int ?: error("Unsized parts not supported yet")
@ -55,6 +61,6 @@ fun Envelope.parts(io: IOPlugin = Global.plugins.fetch(IOPlugin)): Sequence<Enve
} ?: emptySequence()
}
}
else -> emptySequence()
else -> null
}
}