Mutable tables
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@ -2,10 +2,12 @@ package hep.dataforge.io
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import hep.dataforge.meta.Meta
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import kotlinx.io.Binary
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import kotlinx.io.ExperimentalIoApi
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import kotlinx.io.FileBinary
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import kotlinx.io.read
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import java.nio.file.Path
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@ExperimentalIoApi
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class FileEnvelope internal constructor(val path: Path, val format: EnvelopeFormat) : Envelope {
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//TODO do not like this constructor. Hope to replace it later
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@ -208,7 +208,7 @@ val MetaItem<*>?.int get() = number?.toInt()
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val MetaItem<*>?.long get() = number?.toLong()
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val MetaItem<*>?.short get() = number?.toShort()
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inline fun <reified E : Enum<E>> MetaItem<*>?.enum() = if (this is ValueItem && this.value is EnumValue<*>) {
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inline fun <reified E : Enum<E>> MetaItem<*>?.enum(): E? = if (this is ValueItem && this.value is EnumValue<*>) {
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this.value.value as E
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} else {
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string?.let { enumValueOf<E>(it) }
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@ -168,8 +168,8 @@ fun Configurable.float(default: Float, key: Name? = null): ReadWriteProperty<Any
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/**
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* Enum delegate
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*/
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inline fun <reified E : Enum<E>> Configurable.enum(default: E, key: Name? = null): ReadWriteProperty<Any?, E?> =
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item(default, key).transform { it.enum<E>() }
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inline fun <reified E : Enum<E>> Configurable.enum(default: E, key: Name? = null): ReadWriteProperty<Any?, E> =
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item(default, key).transform { it.enum<E>() ?: default }
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/*
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* Extra delegates for special cases
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@ -2,7 +2,16 @@ package hep.dataforge.tables
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import hep.dataforge.meta.scheme.Scheme
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import hep.dataforge.meta.scheme.SchemeSpec
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import hep.dataforge.meta.scheme.enum
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import hep.dataforge.meta.scheme.string
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import hep.dataforge.values.ValueType
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open class ColumnScheme : Scheme() {
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var title by string()
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class ColumnScheme : Scheme() {
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companion object : SchemeSpec<ColumnScheme>(::ColumnScheme)
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}
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class ValueColumnScheme : ColumnScheme() {
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var valueType by enum(ValueType.STRING)
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}
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@ -2,7 +2,7 @@ package hep.dataforge.tables
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import kotlin.reflect.KClass
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class MapRow(val values: Map<String, Any>) : Row {
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inline class MapRow(val values: Map<String, Any?>) : Row {
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override fun <T : Any> getValue(column: String, type: KClass<out T>): T? {
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val value = values[column]
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return type.cast(value)
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@ -1,11 +0,0 @@
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package hep.dataforge.tables
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import hep.dataforge.meta.scheme.Scheme
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import hep.dataforge.meta.scheme.SchemeSpec
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import hep.dataforge.meta.scheme.string
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class MetaQuery : Scheme() {
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var field by string()
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companion object : SchemeSpec<MetaQuery>(::MetaQuery)
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}
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@ -3,7 +3,10 @@ package hep.dataforge.tables
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import hep.dataforge.meta.Meta
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import kotlin.reflect.KClass
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class ColumnTableBuilder<C: Any>(val size: Int) : Table<C> {
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/**
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* Mutable table with a fixed size, but dynamic columns
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*/
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class MutableColumnTable<C: Any>(val size: Int) : Table<C> {
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private val _columns = ArrayList<Column<C>>()
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override val columns: List<Column<C>> get() = _columns
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@ -0,0 +1,43 @@
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package hep.dataforge.tables
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import hep.dataforge.meta.Meta
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import kotlin.reflect.KClass
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class SimpleColumnHeader<T : Any>(
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override val name: String,
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override val type: KClass<out T>,
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override val meta: Meta
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) : ColumnHeader<T>
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class MutableTable<C : Any>(
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override val rows: MutableList<Row>,
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override val header: MutableList<ColumnHeader<C>>
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) : RowTable<C, Row>(rows, header) {
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fun <T : C> column(name: String, type: KClass<out T>, meta: Meta): ColumnHeader<T> {
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val column = SimpleColumnHeader(name, type, meta)
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header.add(column)
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return column
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}
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inline fun <reified T : C> column(
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name: String,
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noinline columnMetaBuilder: ColumnScheme.() -> Unit
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): ColumnHeader<T> {
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return column(name, T::class, ColumnScheme(columnMetaBuilder).toMeta())
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}
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fun row(block: MutableMap<String, Any?>.() -> Unit): Row {
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val map = HashMap<String, Any?>().apply(block)
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val row = MapRow(map)
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rows.add(row)
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return row
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}
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operator fun <T : Any> MutableMap<String, Any?>.set(header: ColumnHeader<T>, value: T?) {
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set(header.name, value)
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}
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}
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fun <C : Any> Table<C>.edit(block: MutableTable<C>.() -> Unit): Table<C> {
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return MutableTable(rows.toMutableList(), header.toMutableList()).apply(block)
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}
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@ -1,23 +1,24 @@
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package hep.dataforge.tables
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import hep.dataforge.meta.Meta
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import kotlinx.coroutines.flow.toList
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import kotlin.reflect.KClass
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internal class RowTableColumn<C : Any, T : C>(val table: Table<C>, val header: ColumnHeader<T>) : Column<T> {
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override val name: String get() = header.name
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override val type: KClass<out T> get() = header.type
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override val meta: Meta get() = header.meta
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override val size: Int get() = table.rows.size
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class RowTable<C: Any, R : Row>(override val rows: List<R>, override val header: List<ColumnHeader<C>>) : Table<C> {
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override fun get(index: Int): T? = table.rows[index].getValue(name, type)
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}
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open class RowTable<C : Any, R : Row>(override val rows: List<R>, override val header: List<ColumnHeader<C>>) :
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Table<C> {
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override fun <T : Any> getValue(row: Int, column: String, type: KClass<out T>): T? =
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rows[row].getValue(column, type)
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override val columns: List<Column<C>> get() = header.map { RotTableColumn(it) }
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private inner class RotTableColumn<T : C>(val header: ColumnHeader<T>) : Column<T> {
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override val name: String get() = header.name
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override val type: KClass<out T> get() = header.type
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override val meta: Meta get() = header.meta
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override val size: Int get() = rows.size
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override fun get(index: Int): T? = rows[index].getValue(name, type)
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}
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override val columns: List<Column<C>> get() = header.map { RowTableColumn(this, it) }
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}
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suspend fun Rows.collect(): Table<*> = this as? Table<*> ?: RowTable(rowFlow().toList(), header)
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@ -1,6 +1,8 @@
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package hep.dataforge.tables
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import hep.dataforge.meta.Meta
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import kotlinx.coroutines.flow.Flow
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import kotlinx.coroutines.flow.asFlow
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import kotlin.reflect.KClass
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//TODO to be removed in 1.3.70
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@ -13,24 +15,34 @@ internal fun <T : Any> KClass<T>.cast(value: Any?): T? {
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}
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}
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typealias TableHeader = List<ColumnHeader<*>>
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typealias TableHeader<C> = List<ColumnHeader<C>>
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/**
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* Finite or infinite row set. Rows are produced in a lazy suspendable [Flow].
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* Each row must contain at least all the fields mentioned in [header].
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*/
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interface Rows {
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val header: TableHeader<*>
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fun rowFlow(): Flow<Row>
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}
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interface Table<out C: Any> {
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interface Table<out C : Any> : Rows {
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fun <T : Any> getValue(row: Int, column: String, type: KClass<out T>): T?
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val columns: Collection<Column<C>>
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val header: TableHeader get() = columns.toList()
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override val header: TableHeader<C> get() = columns.toList()
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val rows: List<Row>
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override fun rowFlow(): Flow<Row> = rows.asFlow()
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/**
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* Apply query to a table and return lazy Flow
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* Apply typed query to this table and return lazy [Flow] of resulting rows. The flow could be empty.
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*/
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//fun find(query: Any): Flow<Row>
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//fun select(query: Any): Flow<Row> = error("Query of type ${query::class} is not supported by this table")
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}
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operator fun Collection<Column<*>>.get(name: String): Column<*>? = find { it.name == name }
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inline operator fun <C: Any, reified T : C> Table<C>.get(row: Int, column: String): T? = getValue(row, column, T::class)
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inline operator fun <C : Any, reified T : C> Table<C>.get(row: Int, column: String): T? =
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getValue(row, column, T::class)
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interface ColumnHeader<out T : Any> {
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val name: String
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@ -38,7 +50,7 @@ interface ColumnHeader<out T : Any> {
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val meta: Meta
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}
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operator fun <C: Any, T : C> Table<C>.get(row: Int, column: Column<T>): T? = getValue(row, column.name, column.type)
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operator fun <C : Any, T : C> Table<C>.get(row: Int, column: Column<T>): T? = getValue(row, column.name, column.type)
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interface Column<out T : Any> : ColumnHeader<T> {
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val size: Int
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@ -58,4 +70,4 @@ interface Row {
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}
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inline operator fun <reified T : Any> Row.get(column: String): T? = getValue(column, T::class)
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operator fun <T : Any> Row.get(column: Column<T>): T? = getValue(column.name, column.type)
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operator fun <T : Any> Row.get(column: ColumnHeader<T>): T? = getValue(column.name, column.type)
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@ -0,0 +1,120 @@
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package hep.dataforge.tables.io
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import hep.dataforge.meta.get
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import hep.dataforge.meta.int
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import hep.dataforge.meta.string
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import hep.dataforge.tables.*
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import hep.dataforge.values.*
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import kotlinx.coroutines.flow.Flow
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import kotlinx.coroutines.flow.collect
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import kotlinx.coroutines.flow.flow
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import kotlinx.io.Binary
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import kotlinx.io.ExperimentalIoApi
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import kotlinx.io.Output
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import kotlinx.io.RandomAccessBinary
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import kotlinx.io.text.forEachUtf8Line
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import kotlinx.io.text.readUtf8Line
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import kotlinx.io.text.writeUtf8String
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import kotlin.reflect.KClass
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private fun readLine(header: List<ColumnHeader<Value>>, line: String): Row {
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val values = line.split("\\s+".toRegex()).map { it.parseValue() }
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if (values.size == header.size) {
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val map = header.map { it.name }.zip(values).toMap()
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return MapRow(map)
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} else {
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error("Can't read line $line. Expected ${header.size} values in a line, but found ${values.size}")
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}
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}
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@ExperimentalIoApi
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class TextRows(override val header: List<ColumnHeader<Value>>, val binary: Binary) : Rows {
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override fun rowFlow(): Flow<Row> = binary.read {
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flow {
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forEachUtf8Line { line ->
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if (line.isNotBlank()) {
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val row = readLine(header, line)
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emit(row)
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}
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}
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}
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}
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}
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@ExperimentalIoApi
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class TextTable(
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override val header: List<ColumnHeader<Value>>,
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val binary: RandomAccessBinary,
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val index: List<Int>
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) : Table<Value> {
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override val columns: Collection<Column<Value>> get() = header.map { RowTableColumn(this, it) }
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override val rows: List<Row> get() = index.map { readAt(it) }
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override fun rowFlow(): Flow<Row> = TextRows(header, binary).rowFlow()
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private fun readAt(offset: Int): Row {
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return binary.read(offset) {
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val line = readUtf8Line()
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return@read readLine(header, line)
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}
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}
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override fun <T : Any> getValue(row: Int, column: String, type: KClass<out T>): T? {
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val offset = index[row]
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return type.cast(readAt(offset)[column])
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}
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}
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fun Output.writeValue(value: Value, width: Int, left: Boolean = true) {
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require(width > 5) { "Width could not be less than 5" }
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val str: String = when (value.type) {
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ValueType.NUMBER -> value.number.toString() //TODO apply decimal format
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ValueType.STRING -> value.string.take(width)
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ValueType.BOOLEAN -> if (value.boolean) {
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"true"
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} else {
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"false"
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}
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ValueType.NULL -> "@null"
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}
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val padded = if (left) {
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str.padEnd(width)
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} else {
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str.padStart(width)
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}
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writeUtf8String(padded)
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}
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val ColumnHeader<Value>.valueType: ValueType? get() = meta["valueType"].string?.let { ValueType.valueOf(it) }
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private val ColumnHeader<Value>.width: Int
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get() = meta["columnWidth"].int ?: when (valueType) {
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ValueType.NUMBER -> 8
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ValueType.STRING -> 16
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ValueType.BOOLEAN -> 5
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ValueType.NULL -> 5
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null -> 16
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}
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/**
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* Write rows without header to the output
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*/
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suspend fun Output.writeRows(rows: Rows) {
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@Suppress("UNCHECKED_CAST") val header = rows.header.map {
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if (it.type != Value::class) error("Expected Value column, but found ${it.type}") else (it as ColumnHeader<Value>)
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}
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val widths: List<Int> = header.map {
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it.width
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}
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rows.rowFlow().collect { row ->
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header.forEachIndexed { index, columnHeader ->
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writeValue(row[columnHeader] ?: Null, widths[index])
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}
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}
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}
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@ -0,0 +1,6 @@
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package hep.dataforge.tables.io
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class TextRowsTest{
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}
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