Hot-fix for scheme initialization

build.gradle.kts

@@ -8,7 +8,7 @@ plugins {
 
 allprojects {
     group = "space.kscience"
-    version = "0.8.0"
+    version = "0.8.1"
 }
 
 subprojects {

dataforge-data/src/jvmTest/kotlin/space/kscience/dataforge/data/ActionsTest.kt

@@ -42,7 +42,7 @@ internal class ActionsTest {
             source.wrap(it.toString(), it)
         }
 
-        delay(10)
+        delay(20)
 
         source.close()
         result.awaitClose()

dataforge-meta/api/dataforge-meta.api

@@ -433,6 +433,7 @@ public final class space/kscience/dataforge/meta/MutableMetaDelegateKt {
 public final class space/kscience/dataforge/meta/MutableMetaKt {
 	public static final fun ObservableMutableMeta ()Lspace/kscience/dataforge/meta/ObservableMutableMeta;
 	public static final fun ObservableMutableMeta (Lkotlin/jvm/functions/Function1;)Lspace/kscience/dataforge/meta/ObservableMutableMeta;
+	public static final fun ObservableMutableMeta (Lspace/kscience/dataforge/meta/Meta;)Lspace/kscience/dataforge/meta/ObservableMutableMeta;
 	public static synthetic fun ObservableMutableMeta$default (Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lspace/kscience/dataforge/meta/ObservableMutableMeta;
 	public static final fun append (Lspace/kscience/dataforge/meta/MutableMeta;Ljava/lang/String;Lspace/kscience/dataforge/meta/Meta;)V
 	public static final fun append (Lspace/kscience/dataforge/meta/MutableMeta;Ljava/lang/String;Lspace/kscience/dataforge/meta/Value;)V
@@ -538,6 +539,8 @@ public final class space/kscience/dataforge/meta/RegexItemTransformationRule : s
 
 public class space/kscience/dataforge/meta/Scheme : space/kscience/dataforge/meta/Configurable, space/kscience/dataforge/meta/MetaRepr, space/kscience/dataforge/meta/MutableMetaProvider, space/kscience/dataforge/meta/descriptors/Described {
 	public fun <init> ()V
+	public fun <init> (Lspace/kscience/dataforge/meta/Meta;Lspace/kscience/dataforge/meta/descriptors/MetaDescriptor;)V
+	public synthetic fun <init> (Lspace/kscience/dataforge/meta/Meta;Lspace/kscience/dataforge/meta/descriptors/MetaDescriptor;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public synthetic fun get (Lspace/kscience/dataforge/names/Name;)Lspace/kscience/dataforge/meta/Meta;
 	public fun get (Lspace/kscience/dataforge/names/Name;)Lspace/kscience/dataforge/meta/MutableMeta;
 	public final fun getDescriptor ()Lspace/kscience/dataforge/meta/descriptors/MetaDescriptor;
@@ -555,6 +558,10 @@ public final class space/kscience/dataforge/meta/SchemeKt {
 	public static final fun copy (Lspace/kscience/dataforge/meta/Scheme;Lspace/kscience/dataforge/meta/SchemeSpec;Lkotlin/jvm/functions/Function1;)Lspace/kscience/dataforge/meta/Scheme;
 	public static synthetic fun copy$default (Lspace/kscience/dataforge/meta/Scheme;Lspace/kscience/dataforge/meta/SchemeSpec;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lspace/kscience/dataforge/meta/Scheme;
 	public static final fun invoke (Lspace/kscience/dataforge/meta/Scheme;Lkotlin/jvm/functions/Function1;)Lspace/kscience/dataforge/meta/Scheme;
+	public static final fun listOfScheme (Lspace/kscience/dataforge/meta/MutableMeta;Lspace/kscience/dataforge/meta/SchemeSpec;Lspace/kscience/dataforge/names/Name;)Lkotlin/properties/ReadWriteProperty;
+	public static final fun listOfScheme (Lspace/kscience/dataforge/meta/Scheme;Lspace/kscience/dataforge/meta/SchemeSpec;Lspace/kscience/dataforge/names/Name;)Lkotlin/properties/ReadWriteProperty;
+	public static synthetic fun listOfScheme$default (Lspace/kscience/dataforge/meta/MutableMeta;Lspace/kscience/dataforge/meta/SchemeSpec;Lspace/kscience/dataforge/names/Name;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
+	public static synthetic fun listOfScheme$default (Lspace/kscience/dataforge/meta/Scheme;Lspace/kscience/dataforge/meta/SchemeSpec;Lspace/kscience/dataforge/names/Name;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
 	public static final fun scheme (Lspace/kscience/dataforge/meta/MutableMeta;Lspace/kscience/dataforge/meta/SchemeSpec;Lspace/kscience/dataforge/names/Name;)Lkotlin/properties/ReadWriteProperty;
 	public static final fun scheme (Lspace/kscience/dataforge/meta/Scheme;Lspace/kscience/dataforge/meta/SchemeSpec;Lspace/kscience/dataforge/names/Name;)Lkotlin/properties/ReadWriteProperty;
 	public static synthetic fun scheme$default (Lspace/kscience/dataforge/meta/MutableMeta;Lspace/kscience/dataforge/meta/SchemeSpec;Lspace/kscience/dataforge/names/Name;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
@@ -837,7 +844,6 @@ public final class space/kscience/dataforge/meta/descriptors/MetaDescriptorBuild
 	public final fun getDefault ()Lspace/kscience/dataforge/meta/Value;
 	public final fun getDescription ()Ljava/lang/String;
 	public final fun getIndexKey ()Ljava/lang/String;
-	public final fun getInfo ()Ljava/lang/String;
 	public final fun getMultiple ()Z
 	public final fun getValueRestriction ()Lspace/kscience/dataforge/meta/descriptors/ValueRestriction;
 	public final fun getValueTypes ()Ljava/util/List;
@@ -847,7 +853,6 @@ public final class space/kscience/dataforge/meta/descriptors/MetaDescriptorBuild
 	public final fun setDefault (Lspace/kscience/dataforge/meta/Value;)V
 	public final fun setDescription (Ljava/lang/String;)V
 	public final fun setIndexKey (Ljava/lang/String;)V
-	public final fun setInfo (Ljava/lang/String;)V
 	public final fun setMultiple (Z)V
 	public final fun setValueRestriction (Lspace/kscience/dataforge/meta/descriptors/ValueRestriction;)V
 	public final fun setValueTypes (Ljava/util/List;)V

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

@@ -378,6 +378,11 @@ public fun Meta.asMutableMeta(): MutableMeta = (this as? MutableMeta) ?: toMutab
 @JsName("newObservableMutableMeta")
 public fun ObservableMutableMeta(): ObservableMutableMeta = MutableMetaImpl(null)
 
+/**
+ * Create a pre-filled [ObservableMutableMeta]
+ */
+public fun ObservableMutableMeta(content: Meta): ObservableMutableMeta = ObservableMutableMeta { update(content) }
+
 /**
  * Build a [MutableMeta] using given transformation
  */

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

@@ -13,32 +13,28 @@ import kotlin.reflect.KProperty1
 
 /**
  * A base for delegate-based or descriptor-based scheme. [Scheme] has an empty constructor to simplify usage from [MetaSpec].
- * Default item provider and [MetaDescriptor] are optional
+ *
+ * @param prototype default values provided by this scheme
  */
-public open class Scheme : Described, MetaRepr, MutableMetaProvider, Configurable {
+public open class Scheme(
+    private var prototype: Meta? = null,
+    descriptor: MetaDescriptor? = null
+) : Described, MetaRepr, MutableMetaProvider, Configurable {
 
     /**
      * Meta to be mutated by this scheme
      */
-    private var target: MutableMeta? = null
+    internal var target: MutableMeta = MutableMeta()
-        get() {
-            // automatic initialization of target if it is missing
-            if (field == null) {
-                field = MutableMeta()
-            }
-            return field
-        }
 
     /**
-     * Default values provided by this scheme
+     * A descriptor of this scheme
      */
-    private var prototype: Meta? = null
+    final override var descriptor: MetaDescriptor? = descriptor
+        private set
+
 
     final override val meta: ObservableMutableMeta = SchemeMeta(Name.EMPTY)
 
-    final override var descriptor: MetaDescriptor? = null
-        private set
-
     /**
      * This method must be called before the scheme could be used
      */
@@ -90,7 +86,7 @@ public open class Scheme : Described, MetaRepr, MutableMetaProvider, Configurabl
                 ?: descriptor?.get(pathName)?.defaultValue
             set(value) {
                 val oldValue = target[pathName]?.value
-                target!![pathName] = value
+                target[pathName] = value
                 if (oldValue != value) {
                     invalidate(Name.EMPTY)
                 }
@@ -126,7 +122,7 @@ public open class Scheme : Described, MetaRepr, MutableMetaProvider, Configurabl
         override fun hashCode(): Int = Meta.hashCode(this)
 
         override fun set(name: Name, node: Meta?) {
-            target!![name] = node
+            target[name] = node
             invalidate(name)
         }
 
@@ -176,15 +172,19 @@ public open class SchemeSpec<T : Scheme>(
         it.initialize(MutableMeta(), source, descriptor)
     }
 
+    /**
+     * Write changes made to the [Scheme] to target [MutableMeta]. If the empty [Scheme] contains any data it is copied to the target.
+     */
     public fun write(target: MutableMeta): T = empty().also {
+        target.update(it.meta)
         it.initialize(target, Meta.EMPTY, descriptor)
     }
 
     /**
-     * Generate an empty object
+     * Generate a blank object. The object could contain some elements if they are defined in a constructor
      */
     public fun empty(): T = builder().also {
-        it.initialize(MutableMeta(), Meta.EMPTY, descriptor)
+        it.initialize(MutableMeta(), it.target, descriptor)
     }
 
     override fun convert(obj: T): Meta  = obj.meta
@@ -269,7 +269,6 @@ public fun <T : Scheme> Scheme.schemeOrNull(
  * If children are mutable, the changes in list elements are reflected on them.
  * The list is a snapshot of children state, so change in structure is not reflected on its composition.
  */
-@DFExperimental
 public fun <T : Scheme> MutableMeta.listOfScheme(
     spec: SchemeSpec<T>,
     key: Name? = null,
@@ -286,7 +285,6 @@ public fun <T : Scheme> MutableMeta.listOfScheme(
 }
 
 
-@DFExperimental
 public fun <T : Scheme> Scheme.listOfScheme(
     spec: SchemeSpec<T>,
     key: Name? = null,

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

@@ -11,9 +11,6 @@ import kotlin.collections.set
 public class MetaDescriptorBuilder @PublishedApi internal constructor() {
     public var description: String? = null
 
-    @Deprecated("Replace by description", ReplaceWith("description"))
-    public var info: String? by ::description
-
     public var children: MutableMap<String, MetaDescriptorBuilder> = linkedMapOf()
     public var multiple: Boolean = false
     public var valueRestriction: ValueRestriction = ValueRestriction.NONE

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

@@ -3,11 +3,12 @@ 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
+/**
+ * Add a value item to a [MetaDescriptor] inferring some of its properties from the type
+ */
 public inline fun <S : Scheme, reified T> MetaDescriptorBuilder.value(
     property: KProperty1<S, T>,
     noinline block: MetaDescriptorBuilder.() -> Unit = {},
@@ -39,7 +40,9 @@ public inline fun <S : Scheme, reified T> MetaDescriptorBuilder.value(
     else -> node(property.name, block)
 }
 
-@DFExperimental
+/**
+ * Add a schem-based branch to a [MetaDescriptor]
+ */
 public inline fun <S : Scheme, reified T : Scheme> MetaDescriptorBuilder.scheme(
     property: KProperty1<S, T>,
     spec: SchemeSpec<T>,

dataforge-meta/src/commonTest/kotlin/space/kscience/dataforge/meta/SchemeTest.kt

@@ -5,7 +5,18 @@ import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertNotNull
 
-@DFExperimental
+
+private class SchemeWithInit: Scheme(){
+    init {
+        set("initial", "initialValue")
+    }
+
+    var initial by string()
+    companion object: SchemeSpec<SchemeWithInit>(::SchemeWithInit)
+}
+
+
+
 class SchemeTest {
     @Test
     fun testSchemeWrappingBeforeEdit() {
@@ -15,6 +26,7 @@ class SchemeTest {
         assertEquals(29, config["a"].int)
     }
 
+    @OptIn(DFExperimental::class)
     @Test
     fun testSchemeWrappingAfterEdit() {
         val scheme = TestScheme.empty()
@@ -46,4 +58,13 @@ class SchemeTest {
         scheme.v = ListValue(1.0, 2.0, 3.0)
         assertNotNull(value)
     }
+
+
+    @Test
+    fun testSchemeWithInit(){
+        val scheme = SchemeWithInit()
+        assertEquals("initialValue", scheme.initial)
+        scheme.initial = "none"
+        assertEquals("none", scheme.initial)
+    }
 }