Implement MetaRef mechanics and tests
This commit is contained in:
parent
5196d85da1
commit
3807960cda
@ -0,0 +1,202 @@
|
||||
package space.kscience.dataforge.meta
|
||||
|
||||
import kotlinx.serialization.json.Json
|
||||
import space.kscience.dataforge.meta.descriptors.Described
|
||||
import space.kscience.dataforge.meta.descriptors.MetaDescriptor
|
||||
import space.kscience.dataforge.meta.descriptors.MetaDescriptorBuilder
|
||||
import space.kscience.dataforge.misc.DFExperimental
|
||||
import space.kscience.dataforge.names.Name
|
||||
import space.kscience.dataforge.names.asName
|
||||
import kotlin.properties.PropertyDelegateProvider
|
||||
import kotlin.properties.ReadOnlyProperty
|
||||
|
||||
|
||||
/**
|
||||
* A reference to a read-only value of type [T] inside [MetaProvider] or writable value in [MutableMetaProvider]
|
||||
*/
|
||||
@DFExperimental
|
||||
public data class MetaRef<T>(
|
||||
public val name: Name,
|
||||
public val converter: MetaConverter<T>,
|
||||
override val descriptor: MetaDescriptor? = converter.descriptor,
|
||||
) : Described
|
||||
|
||||
/**
|
||||
* Get a value from provider by [ref] or return null if node with given name is missing
|
||||
*/
|
||||
@DFExperimental
|
||||
public operator fun <T> MetaProvider.get(ref: MetaRef<T>): T? = get(ref.name)?.let { ref.converter.readOrNull(it) }
|
||||
|
||||
/**
|
||||
* Set a value in a mutable provider by [ref]
|
||||
*/
|
||||
@DFExperimental
|
||||
public operator fun <T> MutableMetaProvider.set(ref: MetaRef<T>, value: T) {
|
||||
set(ref.name, ref.converter.convert(value))
|
||||
}
|
||||
|
||||
/**
|
||||
* Remove a node corresponding to [ref] from a mutable provider if it exists
|
||||
*/
|
||||
@DFExperimental
|
||||
public fun MutableMetaProvider.remove(ref: MetaRef<*>) {
|
||||
remove(ref.name)
|
||||
}
|
||||
|
||||
/**
|
||||
* Base storage of [MetaRef]
|
||||
*/
|
||||
@OptIn(DFExperimental::class)
|
||||
public interface MetaRefStore : Described {
|
||||
public val refs: List<MetaRef<*>>
|
||||
}
|
||||
|
||||
/**
|
||||
* A base class for [Meta] specification that stores references to meta nodes.
|
||||
*/
|
||||
@DFExperimental
|
||||
public abstract class MetaSpec : MetaRefStore {
|
||||
private val _refs: MutableList<MetaRef<*>> = mutableListOf()
|
||||
override val refs: List<MetaRef<*>> get() = _refs
|
||||
|
||||
/**
|
||||
* Register a ref in this specification
|
||||
*/
|
||||
protected fun registerRef(ref: MetaRef<*>) {
|
||||
_refs.add(ref)
|
||||
}
|
||||
|
||||
/**
|
||||
* Create and register a ref by property name and provided converter.
|
||||
* By default, uses descriptor from the converter
|
||||
*/
|
||||
public fun <T> item(
|
||||
converter: MetaConverter<T>,
|
||||
key: Name? = null,
|
||||
descriptor: MetaDescriptor? = converter.descriptor,
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<T>>> =
|
||||
PropertyDelegateProvider { _, property ->
|
||||
val ref = MetaRef(key ?: property.name.asName(), converter, descriptor)
|
||||
registerRef(ref)
|
||||
ReadOnlyProperty { _, _ ->
|
||||
ref
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Override to provide custom [MetaDescriptor]
|
||||
*/
|
||||
protected open fun MetaDescriptorBuilder.buildDescriptor(): Unit = Unit
|
||||
|
||||
override val descriptor: MetaDescriptor by lazy {
|
||||
MetaDescriptor {
|
||||
refs.forEach { ref ->
|
||||
ref.descriptor?.let {
|
||||
node(ref.name, ref.descriptor)
|
||||
}
|
||||
}
|
||||
buildDescriptor()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Register an item using a [descriptorBuilder] to customize descriptor
|
||||
*/
|
||||
@DFExperimental
|
||||
public fun <T> MetaSpec.item(
|
||||
converter: MetaConverter<T>,
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<T>>> = item(converter, key, MetaDescriptor {
|
||||
converter.descriptor?.let { from(it) }
|
||||
descriptorBuilder()
|
||||
})
|
||||
|
||||
//utility methods to add different nodes
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.metaItem(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<Meta>>> =
|
||||
item(MetaConverter.meta, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.string(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<String>>> =
|
||||
item(MetaConverter.string, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.boolean(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<Boolean>>> =
|
||||
item(MetaConverter.boolean, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.stringList(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<List<String>>>> =
|
||||
item(MetaConverter.stringList, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.float(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<Float>>> =
|
||||
item(MetaConverter.float, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.double(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<Double>>> =
|
||||
item(MetaConverter.double, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.int(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<Int>>> =
|
||||
item(MetaConverter.int, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.long(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<Long>>> =
|
||||
item(MetaConverter.long, key, descriptorBuilder)
|
||||
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.doubleArray(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<DoubleArray>>> =
|
||||
item(MetaConverter.doubleArray, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public fun MetaSpec.byteArray(
|
||||
key: Name? = null,
|
||||
descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<ByteArray>>> =
|
||||
item(MetaConverter.byteArray, key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public inline fun <reified E : Enum<E>> MetaSpec.enum(
|
||||
key: Name? = null,
|
||||
noinline descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<E>>> =
|
||||
item(MetaConverter.enum(), key, descriptorBuilder)
|
||||
|
||||
@DFExperimental
|
||||
public inline fun <reified T> MetaSpec.serializable(
|
||||
key: Name? = null,
|
||||
jsonEncoder: Json = Json,
|
||||
noinline descriptorBuilder: MetaDescriptorBuilder.() -> Unit = {},
|
||||
): PropertyDelegateProvider<MetaSpec, ReadOnlyProperty<MetaSpec, MetaRef<T>>> =
|
||||
item(MetaConverter.serializable(jsonEncoder = jsonEncoder), key, descriptorBuilder)
|
@ -0,0 +1,35 @@
|
||||
package space.kscience.dataforge.meta
|
||||
|
||||
import kotlinx.serialization.Serializable
|
||||
import space.kscience.dataforge.misc.DFExperimental
|
||||
import kotlin.test.Test
|
||||
import kotlin.test.assertEquals
|
||||
|
||||
@DFExperimental
|
||||
internal class MetaRefTest {
|
||||
|
||||
@Serializable
|
||||
data class XY(val x: Double, val y: Double)
|
||||
|
||||
object TestMetaSpec : MetaSpec() {
|
||||
val integer by int { description = "Integer value" }
|
||||
val string by string { description = "String value" }
|
||||
val custom by item(MetaConverter.serializable<XY>()) { description = "custom value" }
|
||||
}
|
||||
|
||||
@Test
|
||||
fun specWriteRead() = with(TestMetaSpec){
|
||||
val meta = MutableMeta()
|
||||
|
||||
meta[integer] = 22
|
||||
meta[string] = "33"
|
||||
val xy = XY(33.0, -33.0)
|
||||
meta[custom] = xy
|
||||
|
||||
val sealed = meta.seal()
|
||||
|
||||
assertEquals(22, sealed[integer])
|
||||
assertEquals("33", sealed[string])
|
||||
assertEquals(xy, sealed[custom])
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue
Block a user