visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/Vision.kt

@@ -62,6 +62,7 @@ public interface Vision : Described {
      * Flow of property invalidation events. It does not contain property values after invalidation since it is not clear
      * if it should include inherited properties etc.
      */
+    @OptIn(ExperimentalCoroutinesApi::class)
     public val propertyChanges: Flow<Name> get() = callbackFlow<Name> {
         coroutineScope {
             onPropertyChange(this) {

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/VisionChange.kt

@@ -66,12 +66,7 @@ public class VisionChange(
     public val vision: Vision? = null,
     @Serializable(MetaSerializer::class) public val properties: Meta? = null,
     public val children: Map<Name, VisionChange>? = null,
-) {
+)
-    init {
-        (vision as? VisionGroup)?.attachChildren()
-    }
-
-}
 
 public inline fun VisionChange(manager: VisionManager, block: VisionChangeBuilder.() -> Unit): VisionChange =
     VisionChangeBuilder().apply(block).isolate(manager)

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/VisionGroup.kt

@@ -45,16 +45,6 @@ public interface VisionGroup : Provider, Vision, VisionContainer<Vision> {
         }
     }
 
-    /**
-     * A fix for serialization bug that writes all proper parents inside the tree after deserialization
-     */
-    public fun attachChildren() {
-        children.values.forEach {
-            it.parent = this
-            (it as? VisionGroup)?.attachChildren()
-        }
-    }
-
     public companion object {
         public const val STYLE_TARGET: String = "style"
     }

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/VisionGroupBase.kt

@@ -11,23 +11,26 @@ import kotlinx.serialization.Transient
 
 /**
  * Abstract implementation of mutable group of [Vision]
+ *
+ * @param childrenInternal Internal mutable container for group children
  */
 @Serializable
 @SerialName("vision.group")
-public open class VisionGroupBase : VisionBase(), MutableVisionGroup {
+public open class VisionGroupBase(
-
+    @SerialName("children") internal val childrenInternal: MutableMap<NameToken, Vision> = LinkedHashMap(),
-    /**
+) : VisionBase(), MutableVisionGroup {
-     * Internal mutable container for group children
-     * TODO made protected due to [https://github.com/Kotlin/kotlinx.serialization/issues/1200]
-     */
-    @SerialName("children")
-    protected val childrenInternal: MutableMap<NameToken, Vision> = LinkedHashMap()
 
     /**
      * A map of top level named children
      */
     override val children: Map<NameToken, Vision> get() = childrenInternal
 
+    init {
+        childrenInternal.values.forEach {
+            it.parent = this
+        }
+    }
+
     override suspend fun notifyPropertyChanged(propertyName: Name) {
         super.notifyPropertyChanged(propertyName)
         for (obj in this) {

visionforge-core/src/commonMain/kotlin/hep/dataforge/vision/VisionManager.kt

@@ -30,16 +30,11 @@ public class VisionManager(meta: Meta) : AbstractPlugin(meta) {
             serializersModule = this@VisionManager.serializersModule
         }
 
-    public fun decodeFromString(string: String): Vision = jsonFormat.decodeFromString(visionSerializer, string).also {
+    public fun decodeFromString(string: String): Vision = jsonFormat.decodeFromString(visionSerializer, string)
-        (it as? VisionGroup)?.attachChildren()
-    }
 
     public fun encodeToString(vision: Vision): String = jsonFormat.encodeToString(visionSerializer, vision)
 
-    public fun decodeFromJson(json: JsonElement): Vision =
+    public fun decodeFromJson(json: JsonElement): Vision = jsonFormat.decodeFromJsonElement(visionSerializer, json)
-        jsonFormat.decodeFromJsonElement(visionSerializer, json).also {
-            (it as? VisionGroup)?.attachChildren()
-        }
 
     public fun encodeToJsonElement(vision: Vision): JsonElement =
         jsonFormat.encodeToJsonElement(visionSerializer, vision)

visionforge-solid/src/commonMain/kotlin/hep/dataforge/vision/solid/SolidGroup.kt

@@ -23,21 +23,17 @@ public interface PrototypeHolder {
 
 /**
  * Represents 3-dimensional Visual Group
+ * @param prototypes A container for templates visible inside this group
  */
 @Serializable
 @SerialName("group.solid")
-public class SolidGroup : VisionGroupBase(), Solid, PrototypeHolder {
+public class SolidGroup(
+    @Serializable(Prototypes.Companion::class) @SerialName("prototypes") private var prototypes: MutableVisionGroup? = null,
+) : VisionGroupBase(), Solid, PrototypeHolder {
 
     override val descriptor: NodeDescriptor get() = Solid.descriptor
 
 
-    /**
-     * A container for templates visible inside this group
-     */
-    @Serializable(Prototypes.Companion::class)
-    @SerialName("prototypes")
-    internal var prototypes: MutableVisionGroup? = null
-
     /**
      * Ger a prototype redirecting the request to the parent if prototype is not found
      */
@@ -60,13 +56,6 @@ public class SolidGroup : VisionGroupBase(), Solid, PrototypeHolder {
 
     override var scale: Point3D? = null
 
-    override fun attachChildren() {
-        prototypes?.parent = this
-        prototypes?.attachChildren()
-        super.attachChildren()
-    }
-
-
 //    /**
 //     * TODO add special static group to hold statics without propagation
 //     */
@@ -108,16 +97,11 @@ public fun VisionContainerBuilder<Vision>.group(name: String, action: SolidGroup
 @Serializable(Prototypes.Companion::class)
 internal class Prototypes(
     children: Map<NameToken, Vision> = emptyMap(),
-) : VisionGroupBase(), PrototypeHolder {
+) : VisionGroupBase(children as? MutableMap<NameToken, Vision> ?: children.toMutableMap()), PrototypeHolder {
 
     init {
-        childrenInternal.putAll(children)
-    }
-
-    override fun attachChildren() {
         children.values.forEach {
             it.parent = parent
-            (it as? VisionGroup)?.attachChildren()
         }
     }
 

visionforge-solid/src/commonMain/kotlin/hep/dataforge/vision/solid/SolidManager.kt

@@ -7,7 +7,10 @@ import hep.dataforge.context.PluginTag
 import hep.dataforge.meta.Meta
 import hep.dataforge.names.Name
 import hep.dataforge.names.toName
-import hep.dataforge.vision.*
+import hep.dataforge.vision.Vision
+import hep.dataforge.vision.VisionBase
+import hep.dataforge.vision.VisionGroupBase
+import hep.dataforge.vision.VisionManager
 import hep.dataforge.vision.VisionManager.Companion.VISION_SERIALIZER_MODULE_TARGET
 import kotlinx.serialization.PolymorphicSerializer
 import kotlinx.serialization.json.Json
@@ -67,10 +70,6 @@ public class SolidManager(meta: Meta) : AbstractPlugin(meta) {
 
         public fun encodeToString(solid: Solid): String = jsonForSolids.encodeToString(PolymorphicSerializer(Vision::class), solid)
 
-        fun decodeFromString(str: String): Solid = jsonForSolids.decodeFromString(PolymorphicSerializer(Solid::class), str).also {
+        public fun decodeFromString(str: String): Solid = jsonForSolids.decodeFromString(PolymorphicSerializer(Solid::class), str)
-            if(it is VisionGroup){
-                it.attachChildren()
-            }
-        }
     }
 }

visionforge-solid/src/commonMain/kotlin/hep/dataforge/vision/solid/SolidReference.kt

@@ -82,10 +82,6 @@ public class SolidReferenceGroup(
         includeDefaults: Boolean,
     ): MetaItem<*>? = getRefProperty(name, inherit, includeStyles, includeDefaults)
 
-    override fun attachChildren() {
-        //do nothing
-    }
-
     override val descriptor: NodeDescriptor get() = prototype.descriptor
 
 
@@ -142,10 +138,6 @@ public class SolidReferenceGroup(
             TODO("Not yet implemented")
         }
 
-        override fun attachChildren() {
-            //do nothing
-        }
-
         override val descriptor: NodeDescriptor get() = prototype.descriptor
 
     }

visionforge-solid/src/commonMain/kotlin/hep/dataforge/vision/solid/transform/UnRef.kt

@@ -26,7 +26,9 @@ internal object UnRef : VisualTreeTransform<SolidGroup>() {
     }
 
     private fun MutableVisionGroup.unref(name: Name) {
-        (this as? SolidGroup)?.prototypes?.set(name, null)
+        (this as? SolidGroup)?.prototypes{
+            set(name, null)
+        }
         children.filter { (it.value as? SolidReferenceGroup)?.templateName == name }.forEach { (key, value) ->
             val reference = value as SolidReferenceGroup
             val newChild = mergeChild(reference, reference.prototype)