kscience/dataforge-core
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Major rework of IO

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This commit is contained in:
Alexander Nozik 2019-08-09 20:53:08 +03:00
parent 5921556254
commit 56679cff23
12 changed files with 119 additions and 99 deletions
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8
dataforge-data/src/jvmMain/kotlin/hep/dataforge/data/_data.kt
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@ -1,8 +0,0 @@
package hep.dataforge.data
import kotlinx.coroutines.runBlocking
/**
* Block the thread and get data content
*/
fun <T : Any> Data<T>.get(): T = runBlocking { await() }

6
dataforge-data/src/jvmMain/kotlin/hep/dataforge/data/checkType.kt → dataforge-data/src/jvmMain/kotlin/hep/dataforge/data/dataJVM.kt
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@ -1,8 +1,14 @@
package hep.dataforge.data
import kotlinx.coroutines.runBlocking
import kotlin.reflect.KClass
import kotlin.reflect.full.isSuperclassOf
/**
* Block the thread and get data content
*/
fun <T : Any> Data<T>.get(): T = runBlocking { await() }
/**
* Check that node is compatible with given type meaning that each element could be cast to the type
*/

2
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/BinaryMetaFormat.kt
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@ -80,7 +80,7 @@ object BinaryMetaFormat : MetaFormat {
writeValue(item.value)
}
is MetaItem.NodeItem -> {
writeObject(item.node)
writeThis(item.node)
}
}
}

18
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/Envelope.kt
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@ -1,6 +1,8 @@
package hep.dataforge.io
import hep.dataforge.context.Named
import hep.dataforge.io.EnvelopeFormat.Companion.ENVELOPE_FORMAT_TYPE
import hep.dataforge.io.IOPlugin.Companion.defaultMetaFormats
import hep.dataforge.meta.Meta
import hep.dataforge.meta.get
import hep.dataforge.meta.string
@ -49,15 +51,23 @@ val Envelope.dataType: String? get() = meta[Envelope.ENVELOPE_DATA_TYPE_KEY].str
*/
val Envelope.description: String? get() = meta[Envelope.ENVELOPE_DESCRIPTION_KEY].string
/**
* A partially read envelope with meta, but without data
*/
@ExperimentalUnsignedTypes
data class PartialEnvelope(val meta: Meta, val dataOffset: UInt, val dataSize: ULong?)
@Type(ENVELOPE_FORMAT_TYPE)
interface EnvelopeFormat : IOFormat<Envelope>{
fun readPartial(input: Input): PartialEnvelope
interface EnvelopeFormat : IOFormat<Envelope>, Named {
fun Input.readPartial(formats: Collection<MetaFormat> = defaultMetaFormats): PartialEnvelope
fun Output.writeEnvelope(envelope: Envelope, format: MetaFormat)
fun Input.readEnvelope(formats: Collection<MetaFormat> = defaultMetaFormats): Envelope
override fun Output.writeObject(obj: Envelope) = writeEnvelope(obj, JsonMetaFormat)
override fun Input.readThis(): Envelope = readEnvelope()
fun Output.writeEnvelope(envelope: Envelope, format: MetaFormat = JsonMetaFormat)
override fun Output.writeThis(obj: Envelope) = writeEnvelope(obj)
companion object {
const val ENVELOPE_FORMAT_TYPE = "envelopeFormat"

8
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/IOFormat.kt
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@ -6,9 +6,9 @@ import kotlinx.io.core.*
* And interface for serialization facilities
*/
interface IOFormat<T : Any> {
fun Output.writeObject(obj: T)
fun Input.readObject(): T
fun Output.writeThis(obj: T)
fun Input.readThis(): T
}
fun <T : Any> IOFormat<T>.writePacket(obj: T): ByteReadPacket = buildPacket { writeObject(obj) }
fun <T : Any> IOFormat<T>.writeBytes(obj: T): ByteArray = buildPacket { writeObject(obj) }.readBytes()
fun <T : Any> IOFormat<T>.writePacket(obj: T): ByteReadPacket = buildPacket { writeThis(obj) }
fun <T : Any> IOFormat<T>.writeBytes(obj: T): ByteArray = buildPacket { writeThis(obj) }.readBytes()

10
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/IOPlugin.kt
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@ -6,7 +6,6 @@ import hep.dataforge.context.PluginTag
import hep.dataforge.context.content
import hep.dataforge.meta.Meta
import hep.dataforge.names.Name
import hep.dataforge.names.asName
import kotlin.reflect.KClass
class IOPlugin(meta: Meta) : AbstractPlugin(meta) {
@ -21,16 +20,15 @@ class IOPlugin(meta: Meta) : AbstractPlugin(meta) {
override fun provideTop(target: String): Map<Name, Any> {
return when (target) {
MetaFormat.META_FORMAT_TYPE -> internalMetaFormats
EnvelopeFormat.ENVELOPE_FORMAT_TYPE -> mapOf(
TaggedEnvelopeFormat.VERSION.asName() to TaggedEnvelopeFormat(metaFormats)
)
MetaFormat.META_FORMAT_TYPE -> defaultMetaFormats.toMap()
EnvelopeFormat.ENVELOPE_FORMAT_TYPE -> defaultEnvelopeFormats.toMap()
else -> super.provideTop(target)
}
}
companion object : PluginFactory<IOPlugin> {
private val internalMetaFormats = listOf(JsonMetaFormat, BinaryMetaFormat).toMap()
val defaultMetaFormats: List<MetaFormat> = listOf(JsonMetaFormat, BinaryMetaFormat)
val defaultEnvelopeFormats = listOf(TaggedEnvelopeFormat)
override val tag: PluginTag = PluginTag("io", group = PluginTag.DATAFORGE_GROUP)
override val type: KClass<out IOPlugin> = IOPlugin::class

5
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/JsonMetaFormat.kt
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@ -56,15 +56,16 @@ fun Value.toJson(descriptor: ValueDescriptor? = null): JsonElement {
//Use theese methods to customize JSON key mapping
private fun NameToken.toJsonKey(descriptor: ItemDescriptor?) = toString()
private fun NodeDescriptor?.getDescriptor(key: String) = this?.items?.get(key)
fun Meta.toJson(descriptor: NodeDescriptor? = null): JsonObject {
//TODO search for same name siblings and arrange them into arrays
val map = this.items.entries.associate {(name,item)->
val map = this.items.entries.associate { (name, item) ->
val itemDescriptor = descriptor?.items?.get(name.body)
val key = name.toJsonKey(itemDescriptor)
val value = when (item) {
val value = when (item) {
is MetaItem.ValueItem -> {
item.value.toJson(itemDescriptor as? ValueDescriptor)
}

12
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/MetaFormat.kt
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@ -15,11 +15,11 @@ interface MetaFormat : IOFormat<Meta>, Named {
override val name: String
val key: Short
override fun Output.writeObject(obj: Meta) {
override fun Output.writeThis(obj: Meta) {
writeMeta(obj, null)
}
override fun Input.readObject(): Meta = readMeta(null)
override fun Input.readThis(): Meta = readMeta(null)
fun Output.writeMeta(meta: Meta, descriptor: NodeDescriptor? = null)
fun Input.readMeta(descriptor: NodeDescriptor? = null): Meta
@ -30,20 +30,20 @@ interface MetaFormat : IOFormat<Meta>, Named {
}
fun Meta.toString(format: MetaFormat = JsonMetaFormat): String = buildPacket {
format.run { writeObject(this@toString) }
format.run { writeThis(this@toString) }
}.readText()
fun Meta.toBytes(format: MetaFormat = JsonMetaFormat): ByteReadPacket = buildPacket {
format.run { writeObject(this@toBytes) }
format.run { writeThis(this@toBytes) }
}
fun MetaFormat.parse(str: String): Meta {
return ByteReadPacket(str.toByteArray()).readObject()
return ByteReadPacket(str.toByteArray()).readThis()
}
fun MetaFormat.fromBytes(packet: ByteReadPacket): Meta {
return packet.readObject()
return packet.readThis()
}

124
dataforge-io/src/commonMain/kotlin/hep/dataforge/io/TaggedEnvelopeFormat.kt
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@ -2,21 +2,75 @@ package hep.dataforge.io
import kotlinx.io.core.*
class TaggedEnvelopeFormat(val metaFormats: Collection<MetaFormat>) : EnvelopeFormat {
@ExperimentalUnsignedTypes
object TaggedEnvelopeFormat : EnvelopeFormat {
const val VERSION = "DF03"
private const val START_SEQUENCE = "#~"
private const val END_SEQUENCE = "~#\r\n"
private const val TAG_SIZE = 26u
override val name: String get() = VERSION
private fun Tag.toBytes(): ByteReadPacket = buildPacket(24) {
writeText(START_SEQUENCE)
writeText(VERSION)
writeShort(metaFormatKey)
writeUInt(metaSize)
writeULong(dataSize)
writeText(END_SEQUENCE)
}
private fun Input.readTag(): Tag {
val start = readTextExactBytes(2)
if (start != START_SEQUENCE) error("The input is not an envelope")
val version = readTextExactBytes(4)
if (version != VERSION) error("Wrong version of DataForge: expected $VERSION but found $version")
val metaFormatKey = readShort()
val metaLength = readUInt()
val dataLength = readULong()
return Tag(metaFormatKey, metaLength, dataLength)
}
override fun Output.writeEnvelope(envelope: Envelope, format: MetaFormat) {
write(this, envelope, format)
val metaBytes = format.writeBytes(envelope.meta)
val tag = Tag(format.key, metaBytes.size.toUInt(), envelope.data?.size ?: 0.toULong())
writePacket(tag.toBytes())
writeFully(metaBytes)
envelope.data?.read { copyTo(this@writeEnvelope) }
}
/**
* Read an envelope from input into memory
*
* @param input an input to read from
* @param metaFormats a collection of meta formats to resolve
* @param formats a collection of meta formats to resolve
*/
override fun Input.readObject(): Envelope = read(this, metaFormats)
override fun Input.readEnvelope(formats: Collection<MetaFormat>): Envelope {
val tag = readTag()
override fun readPartial(input: Input): PartialEnvelope = Companion.readPartial(input, metaFormats)
val metaFormat = formats.find { it.key == tag.metaFormatKey }
?: error("Meta format with key ${tag.metaFormatKey} not found")
val metaPacket = ByteReadPacket(readBytes(tag.metaSize.toInt()))
val meta = metaFormat.run { metaPacket.readThis() }
val dataBytes = readBytes(tag.dataSize.toInt())
return SimpleEnvelope(meta, ArrayBinary(dataBytes))
}
override fun Input.readPartial(formats: Collection<MetaFormat>): PartialEnvelope {
val tag = readTag()
val metaFormat = formats.find { it.key == tag.metaFormatKey }
?: error("Meta format with key ${tag.metaFormatKey} not found")
val metaPacket = ByteReadPacket(readBytes(tag.metaSize.toInt()))
val meta = metaFormat.run { metaPacket.readThis() }
return PartialEnvelope(meta, TAG_SIZE + tag.metaSize, tag.dataSize)
}
private data class Tag(
val metaFormatKey: Short,
@ -24,64 +78,4 @@ class TaggedEnvelopeFormat(val metaFormats: Collection<MetaFormat>) : EnvelopeFo
val dataSize: ULong
)
companion object {
const val VERSION = "DF03"
private const val START_SEQUENCE = "#~"
private const val END_SEQUENCE = "~#\r\n"
private const val TAG_SIZE = 26u
private fun Tag.toBytes(): ByteReadPacket = buildPacket(24) {
writeText(START_SEQUENCE)
writeText(VERSION)
writeShort(metaFormatKey)
writeUInt(metaSize)
writeULong(dataSize)
writeText(END_SEQUENCE)
}
private fun Input.readTag(): Tag {
val start = readTextExactBytes(2)
if (start != START_SEQUENCE) error("The input is not an envelope")
val version = readTextExactBytes(4)
if (version != VERSION) error("Wrong version of DataForge: expected $VERSION but found $version")
val metaFormatKey = readShort()
val metaLength = readUInt()
val dataLength = readULong()
return Tag(metaFormatKey, metaLength, dataLength)
}
fun read(input: Input, metaFormats: Collection<MetaFormat>): Envelope {
val tag = input.readTag()
val metaFormat = metaFormats.find { it.key == tag.metaFormatKey }
?: error("Meta format with key ${tag.metaFormatKey} not found")
val metaPacket = ByteReadPacket(input.readBytes(tag.metaSize.toInt()))
val meta = metaFormat.run { metaPacket.readObject() }
val dataBytes = input.readBytes(tag.dataSize.toInt())
return SimpleEnvelope(meta, ArrayBinary(dataBytes))
}
fun readPartial(input: Input, metaFormats: Collection<MetaFormat>): PartialEnvelope {
val tag = input.readTag()
val metaFormat = metaFormats.find { it.key == tag.metaFormatKey }
?: error("Meta format with key ${tag.metaFormatKey} not found")
val metaPacket = ByteReadPacket(input.readBytes(tag.metaSize.toInt()))
val meta = metaFormat.run { metaPacket.readObject() }
return PartialEnvelope(meta, TAG_SIZE + tag.metaSize, tag.dataSize)
}
fun write(out: Output, envelope: Envelope, metaFormat: MetaFormat) {
val metaBytes = metaFormat.writeBytes(envelope.meta)
val tag = Tag(metaFormat.key, metaBytes.size.toUInt(), envelope.data?.size ?: 0.toULong())
out.writePacket(tag.toBytes())
out.writeFully(metaBytes)
envelope.data?.read { copyTo(out) }
}
}
}

1
dataforge-io/src/jvmMain/kotlin/hep/dataforge/io/FileBinary.kt
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@ -7,6 +7,7 @@ import java.nio.file.Files
import java.nio.file.Path
import java.nio.file.StandardOpenOption
@ExperimentalUnsignedTypes
class FileBinary(val path: Path, private val offset: UInt = 0u, size: ULong? = null) : RandomAccessBinary {
override val size: ULong = size ?: (Files.size(path).toULong() - offset).toULong()

22
dataforge-io/src/jvmMain/kotlin/hep/dataforge/io/FileEnvelope.kt
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@ -2,6 +2,7 @@ package hep.dataforge.io
import hep.dataforge.meta.Meta
import kotlinx.io.nio.asInput
import kotlinx.io.nio.asOutput
import java.nio.file.Files
import java.nio.file.Path
import java.nio.file.StandardOpenOption
@ -13,7 +14,7 @@ class FileEnvelope internal constructor(val path: Path, val format: EnvelopeForm
init {
val input = Files.newByteChannel(path, StandardOpenOption.READ).asInput()
partialEnvelope = format.readPartial(input)
partialEnvelope = format.run { input.readPartial() }
}
override val meta: Meta get() = partialEnvelope.meta
@ -21,4 +22,21 @@ class FileEnvelope internal constructor(val path: Path, val format: EnvelopeForm
override val data: Binary? = FileBinary(path, partialEnvelope.dataOffset, partialEnvelope.dataSize)
}
fun Path.readEnvelope(format: EnvelopeFormat) = FileEnvelope(this,format)
fun Path.readEnvelope(format: EnvelopeFormat) = FileEnvelope(this, format)
fun Path.writeEnvelope(
envelope: Envelope,
format: EnvelopeFormat = TaggedEnvelopeFormat,
metaFormat: MetaFormat = JsonMetaFormat
) {
val output = Files.newByteChannel(
this,
StandardOpenOption.WRITE,
StandardOpenOption.CREATE,
StandardOpenOption.TRUNCATE_EXISTING
).asOutput()
with(format) {
output.writeEnvelope(envelope, metaFormat)
}
}

2
dataforge-workspace/src/jvmMain/kotlin/hep/dataforge/workspace/fileData.kt
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@ -62,7 +62,7 @@ suspend fun <T : Any> Context.readData(
format.run {
Files.newByteChannel(path, StandardOpenOption.READ)
.asInput()
.readObject()
.readThis()
}
}
}