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Remove KClass from dataforge-data

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This commit is contained in:
Alexander Nozik 2021-02-07 19:36:41 +03:00
parent 1970243785
commit 7d3df24568
1 changed files with 6 additions and 34 deletions
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40
dataforge-data/src/jvmMain/kotlin/hep/dataforge/data/select.kt
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@ -12,44 +12,15 @@ import kotlin.reflect.full.isSubtypeOf
import kotlin.reflect.typeOf import kotlin.reflect.typeOf
/**
* Check if data could be safely cast to given class
*/
private fun <R : Any> Data<*>.canCast(type: KType): Boolean = this.type.isSubtypeOf(type)
/** /**
* Cast the node to given type if the cast is possible or return null * Cast the node to given type if the cast is possible or return null
*/ */
@Suppress("UNCHECKED_CAST") @Suppress("UNCHECKED_CAST")
private fun <R : Any> Data<*>.castOrNull(type: KType): Data<R>? = private fun <R : Any> Data<*>.castOrNull(type: KType): Data<R>? =
if (!canCast<R>(type)) null else object : Data<R> by (this as Data<R>) { if (!this.type.isSubtypeOf(type)) null else object : Data<R> by (this as Data<R>) {
override val type: KType = type override val type: KType = type
} }
/**
* Unsafe cast of data node
*/
private fun <R : Any> Data<*>.cast(type: KType): Data<R> =
castOrNull(type) ?: error("Can't cast ${this.type} to $type")
private inline fun <reified R : Any> Data<*>.cast(): Data<R> = cast(typeOf<R>())
@Suppress("UNCHECKED_CAST")
private fun <R : Any> DataSet<*>.castOrNull(type: KType): DataSet<R>? =
if (!canCast<R>(type)) null else object : DataSet<R> by (this as DataSet<R>) {
override val dataType: KType = type
}
private fun <R : Any> DataSet<*>.cast(type: KType): DataSet<R> =
castOrNull(type) ?: error("Can't cast ${this.dataType} to $type")
/**
* Check that node is compatible with given type meaning that each element could be cast to the type
*/
private fun <R : Any> DataSet<*>.canCast(type: KType): Boolean =
type.isSubtypeOf(this.dataType)
/** /**
* Select all data matching given type and filters. Does not modify paths * Select all data matching given type and filters. Does not modify paths
*/ */
@ -61,10 +32,11 @@ internal fun <R : Any> DataSet<*>.select(
): ActiveDataSet<R> = object : ActiveDataSet<R> { ): ActiveDataSet<R> = object : ActiveDataSet<R> {
override val dataType = type override val dataType = type
@Suppress("UNCHECKED_CAST")
override fun flow(): Flow<NamedData<R>> = this@select.flow().filter { override fun flow(): Flow<NamedData<R>> = this@select.flow().filter { datum ->
it.type.isSubtypeOf(type) && (namePattern == null || it.name.matches(namePattern)) datum.type.isSubtypeOf(type) && (namePattern == null || datum.name.matches(namePattern))
}.map { }.map {
@Suppress("UNCHECKED_CAST")
it as NamedData<R> it as NamedData<R>
} }
@ -72,7 +44,7 @@ internal fun <R : Any> DataSet<*>.select(
override val updates: Flow<Name> = this@select.updates.filter { override val updates: Flow<Name> = this@select.updates.filter {
val datum = this@select.getData(it) val datum = this@select.getData(it)
datum?.canCast<R>(type) ?: false datum?.type?.isSubtypeOf(type) ?: false
} }
} }