CHANGELOG.md

@@ -9,6 +9,7 @@
 
 ### Changed
 - Descriptor `children` renamed to `nodes`
+- `MetaConverter` now inherits `MetaSpec` (former `Specifiction`). So `MetaConverter` could be used more universally.
 
 ### Deprecated
 - `node(key,converter)` in favor of `serializable` delegate

dataforge-context/src/commonMain/kotlin/space/kscience/dataforge/properties/Property.kt

@@ -1,6 +1,5 @@
 package space.kscience.dataforge.properties
 
-import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import space.kscience.dataforge.misc.DFExperimental
@@ -14,7 +13,6 @@ public interface Property<T> {
 }
 
 @DFExperimental
-@OptIn(ExperimentalCoroutinesApi::class)
 public fun <T> Property<T>.toFlow(): StateFlow<T> = MutableStateFlow(value).also { stateFlow ->
     onChange {
         stateFlow.value = it

dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/MetaConverter.kt

@@ -183,7 +183,6 @@ public interface MetaConverter<T>: MetaSpec<T> {
     }
 }
 
-public fun <T : Any> MetaConverter<T>.readNullable(item: Meta?): T? = item?.let { read(it) }
 public fun <T : Any> MetaConverter<T>.convertNullable(obj: T?): Meta? = obj?.let { convert(it) }
 
-public fun <T> MetaConverter<T>.readValue(value: Value): T? = read(Meta(value))
+

dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/MetaDelegate.kt

@@ -13,13 +13,13 @@ public fun MetaProvider.node(key: Name? = null): ReadOnlyProperty<Any?, Meta?> =
 }
 
 /**
- * Use [converter] to read the Meta node
+ * Use [metaSpec] to read the Meta node
  */
-public fun <T> MetaProvider.convertable(
-    converter: MetaConverter<T>,
+public fun <T> MetaProvider.spec(
+    metaSpec: MetaSpec<T>,
     key: Name? = null,
 ): ReadOnlyProperty<Any?, T?> = ReadOnlyProperty { _, property ->
-    get(key ?: property.name.asName())?.let { converter.read(it) }
+    get(key ?: property.name.asName())?.let { metaSpec.read(it) }
 }
 
 /**
@@ -29,19 +29,19 @@ public fun <T> MetaProvider.convertable(
 public inline fun <reified T> MetaProvider.serializable(
     descriptor: MetaDescriptor? = null,
     key: Name? = null,
-): ReadOnlyProperty<Any?, T?> = convertable(MetaConverter.serializable(descriptor), key)
+): ReadOnlyProperty<Any?, T?> = spec(MetaConverter.serializable(descriptor), key)
 
 @Deprecated("Use convertable", ReplaceWith("convertable(converter, key)"))
 public fun <T> MetaProvider.node(
     key: Name? = null,
-    converter: MetaConverter<T>,
-): ReadOnlyProperty<Any?, T?> = convertable(converter, key)
+    converter: MetaSpec<T>,
+): ReadOnlyProperty<Any?, T?> = spec(converter, key)
 
 /**
  * Use [converter] to convert a list of same name siblings meta to object
  */
-public fun <T> Meta.listOfConvertable(
-    converter: MetaConverter<T>,
+public fun <T> Meta.listOfSpec(
+    converter: MetaSpec<T>,
     key: Name? = null,
 ): ReadOnlyProperty<Any?, List<T>> = ReadOnlyProperty{_, property ->
     val name = key ?: property.name.asName()
@@ -52,7 +52,7 @@ public fun <T> Meta.listOfConvertable(
 public inline fun <reified T> Meta.listOfSerializable(
     descriptor: MetaDescriptor? = null,
     key: Name? = null,
-): ReadOnlyProperty<Any?, List<T>> = listOfConvertable(MetaConverter.serializable(descriptor), key)
+): ReadOnlyProperty<Any?, List<T>> = listOfSpec(MetaConverter.serializable(descriptor), key)
 
 /**
  * A property delegate that uses custom key

dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/MetaSpec.kt

@@ -16,3 +16,6 @@ public interface MetaSpec<out T> : Described {
     public fun read(source: Meta): T = readOrNull(source) ?: error("Meta $source could not be interpreted by $this")
 }
 
+
+public fun <T : Any> MetaSpec<T>.readNullable(item: Meta?): T? = item?.let { read(it) }
+public fun <T> MetaSpec<T>.readValue(value: Value): T? = read(Meta(value))

dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/ObservableMeta.kt

@@ -1,8 +1,10 @@
 package space.kscience.dataforge.meta
 
 import space.kscience.dataforge.misc.ThreadSafe
-import space.kscience.dataforge.names.*
-import kotlin.reflect.KProperty1
+import space.kscience.dataforge.names.Name
+import space.kscience.dataforge.names.cutFirst
+import space.kscience.dataforge.names.firstOrNull
+import space.kscience.dataforge.names.isEmpty
 
 
 internal data class MetaListener(
@@ -67,24 +69,4 @@ internal abstract class AbstractObservableMeta : ObservableMeta {
     override fun toString(): String = Meta.toString(this)
     override fun equals(other: Any?): Boolean = Meta.equals(this, other as? Meta)
     override fun hashCode(): Int = Meta.hashCode(this)
-}
-
-/**
- * Use the value of the property in a [callBack].
- * The callback is called once immediately after subscription to pass the initial value.
- *
- * Optional [owner] property is used for
- */
-public fun <S : Scheme, T> S.useProperty(
-    property: KProperty1<S, T>,
-    owner: Any? = null,
-    callBack: S.(T) -> Unit,
-) {
-    //Pass initial value.
-    callBack(property.get(this))
-    meta.onChange(owner) { name ->
-        if (name.startsWith(property.name.asName())) {
-            callBack(property.get(this@useProperty))
-        }
-    }
 }

dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/Scheme.kt

@@ -9,6 +9,7 @@ import space.kscience.dataforge.misc.ThreadSafe
 import space.kscience.dataforge.names.*
 import kotlin.properties.ReadWriteProperty
 import kotlin.reflect.KProperty
+import kotlin.reflect.KProperty1
 
 /**
  * A base for delegate-based or descriptor-based scheme. [Scheme] has an empty constructor to simplify usage from [MetaSpec].
@@ -288,3 +289,24 @@ public fun <T : Scheme> Scheme.listOfScheme(
     spec: SchemeSpec<T>,
     key: Name? = null,
 ): ReadWriteProperty<Any?, List<T>> = meta.listOfScheme(spec, key)
+
+
+/**
+ * Use the value of the property in a [callBack].
+ * The callback is called once immediately after subscription to pass the initial value.
+ *
+ * Optional [owner] property is used for
+ */
+public fun <S : Scheme, T> S.useProperty(
+    property: KProperty1<S, T>,
+    owner: Any? = null,
+    callBack: S.(T) -> Unit,
+) {
+    //Pass initial value.
+    callBack(property.get(this))
+    meta.onChange(owner) { name ->
+        if (name.startsWith(property.name.asName())) {
+            callBack(property.get(this@useProperty))
+        }
+    }
+}

dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/descriptors/schemeDescriptor.kt

@@ -3,9 +3,11 @@ package space.kscience.dataforge.meta.descriptors
 import space.kscience.dataforge.meta.Scheme
 import space.kscience.dataforge.meta.SchemeSpec
 import space.kscience.dataforge.meta.ValueType
+import space.kscience.dataforge.misc.DFExperimental
 import kotlin.reflect.KProperty1
 import kotlin.reflect.typeOf
 
+@DFExperimental
 public inline fun <S : Scheme, reified T> MetaDescriptorBuilder.value(
     property: KProperty1<S, T>,
     noinline block: MetaDescriptorBuilder.() -> Unit = {},
@@ -37,6 +39,7 @@ public inline fun <S : Scheme, reified T> MetaDescriptorBuilder.value(
     else -> node(property.name, block)
 }
 
+@DFExperimental
 public inline fun <S : Scheme, reified T : Scheme> MetaDescriptorBuilder.scheme(
     property: KProperty1<S, T>,
     spec: SchemeSpec<T>,