Json meta format fix

dataforge-meta-io/src/commonMain/kotlin/hep/dataforge/meta/io/JsonMetaFormat.kt

@@ -3,6 +3,7 @@ package hep.dataforge.meta.io
 import hep.dataforge.meta.Meta
 import hep.dataforge.meta.MetaItem
 import hep.dataforge.names.NameToken
+import hep.dataforge.names.toName
 import hep.dataforge.values.*
 import kotlinx.io.core.Input
 import kotlinx.io.core.Output
@@ -22,10 +23,10 @@ object JsonMetaFormat : MetaFormat {
         val str = input.readText()
         val json = Json.plain.parseJson(str)
 
-        if(json is JsonObject) {
+        if (json is JsonObject) {
             return json.toMeta()
         } else {
-            TODO("non-object root")
+            TODO("Non-object root not supported")
         }
     }
 }
@@ -51,34 +52,47 @@ fun Meta.toJson(): JsonObject {
 }
 
 
-fun JsonElement.toMetaItem() = when (this) {
-    is JsonPrimitive -> MetaItem.ValueItem<JsonMeta>(this.toValue())
-    is JsonObject -> MetaItem.NodeItem(this.toMeta())
-    is JsonArray -> {
-        if (this.all { it is JsonPrimitive }) {
-            val value = ListValue(this.map { (it as JsonPrimitive).toValue() })
-            MetaItem.ValueItem<JsonMeta>(value)
-        } else {
-            TODO("mixed nodes json")
-        }
-    }
-}
-
 fun JsonObject.toMeta() = JsonMeta(this)
 
-private fun JsonPrimitive.toValue(): Value {
-    return when (this) {
-        JsonNull -> Null
-        else -> this.content.parseValue() // Optimize number and boolean parsing
-    }
-}
-
 class JsonMeta(val json: JsonObject) : Meta {
-    override val items: Map<NameToken, MetaItem<out Meta>> by lazy {
+
-        json.mapKeys { NameToken(it.key) }.mapValues { entry ->
+    private fun JsonPrimitive.toValue(): Value {
-            entry.value.toMetaItem()
+        return when (this) {
+            JsonNull -> Null
+            else -> this.content.parseValue() // Optimize number and boolean parsing
         }
     }
+
+    private operator fun MutableMap<String, MetaItem<JsonMeta>>.set(key: String, value: JsonElement) = when (value) {
+        is JsonPrimitive -> this[key] = MetaItem.ValueItem(value.toValue())
+        is JsonObject -> this[key] = MetaItem.NodeItem(value.toMeta())
+        is JsonArray -> {
+            when {
+                value.all { it is JsonPrimitive } -> {
+                    val listValue = ListValue(
+                        value.map {
+                            //We already checked that all values are primitives
+                            (it as JsonPrimitive).toValue()
+                        }
+                    )
+                    this[key] = MetaItem.ValueItem(listValue)
+                }
+                else -> value.forEachIndexed { index, jsonElement ->
+                    when (jsonElement) {
+                        is JsonObject -> this["$key[$index]"] = MetaItem.NodeItem(JsonMeta(jsonElement))
+                        is JsonPrimitive -> this["$key[$index]"] = MetaItem.ValueItem(jsonElement.toValue())
+                        is JsonArray -> TODO("Nested arrays not supported")
+                    }
+                }
+            }
+        }
+    }
+
+    override val items: Map<NameToken, MetaItem<JsonMeta>> by lazy {
+        val map = HashMap<String, MetaItem<JsonMeta>>()
+        json.forEach { (key, value) -> map[key] = value }
+        map.mapKeys { it.key.toName().first()!! }
+    }
 }
 
 class JsonMetaFormatFactory : MetaFormatFactory {

dataforge-meta/src/commonMain/kotlin/hep/dataforge/descriptors/NodeDescriptor.kt

@@ -21,10 +21,8 @@
  */
 package hep.dataforge.descriptors
 
-import hep.dataforge.Named
 import hep.dataforge.meta.*
-import hep.dataforge.names.Name
+import hep.dataforge.names.toName
-import java.util.*
 
 /**
  * Descriptor for meta node. Could contain additional information for viewing
@@ -32,7 +30,14 @@ import java.util.*
  *
  * @author Alexander Nozik
  */
-open class NodeDescriptor(val meta: Meta) : MetaRepr {
+class NodeDescriptor(override val config: Config) : Specification {
+
+    /**
+     * The name of this node
+     *
+     * @return
+     */
+    var name: String by string { error("Anonymous descriptors are not allowed") }
 
     /**
      * True if multiple children with this nodes name are allowed. Anonymous
@@ -40,103 +45,47 @@ open class NodeDescriptor(val meta: Meta) : MetaRepr {
      *
      * @return
      */
-    val multiple: Boolean by meta.boolean(false)
+    var multiple: Boolean by boolean(false)
 
     /**
      * True if the node is required
      *
      * @return
      */
-    val required: Boolean by meta.boolean(false)
+    var required: Boolean by boolean(false)
 
     /**
      * The node description
      *
      * @return
      */
-    open val info: String by meta.string("")
+    var info: String? by string()
 
     /**
      * A list of tags for this node. Tags used to customize node usage
      *
      * @return
      */
-    val tags: List<String> by customValue(def = emptyList()) { it.list.map { it.string } }
+    var tags: List<String> by value().map { value ->
-
+        value?.list?.map { it.string } ?: emptyList()
-    /**
+    }
-     * The name of this node
-     *
-     * @return
-     */
-    override val name: String by stringValue(def = meta.name)
 
     /**
      * The list of value descriptors
-     *
-     * @return
      */
-    fun valueDescriptors(): Map<String, ValueDescriptor> {
+    val values: Map<String, ValueDescriptor>
-        val map = HashMap<String, ValueDescriptor>()
+        get() = config.getAll("value".toName()).entries.associate { (name, node) ->
-        if (meta.hasMeta("value")) {
+            name to ValueDescriptor.wrap(node.node ?: error("Value descriptor must be a node"))
-            for (valueNode in meta.getMetaList("value")) {
-                val vd = ValueDescriptor(valueNode)
-                map[vd.name] = vd
-            }
         }
-        return map
-    }
-
-    /**
-     * The child node descriptor for given name. Name syntax is supported.
-     *
-     * @param name
-     * @return
-     */
-    fun getNodeDescriptor(name: String): NodeDescriptor? {
-        return getNodeDescriptor(Name.of(name))
-    }
-
-    fun getNodeDescriptor(name: Name): NodeDescriptor? {
-        return if (name.length == 1) {
-            childrenDescriptors()[name.unescaped]
-        } else {
-            getNodeDescriptor(name.cutLast())?.getNodeDescriptor(name.last)
-        }
-    }
-
-    /**
-     * The value descriptor for given value name. Name syntax is supported.
-     *
-     * @param name
-     * @return
-     */
-    fun getValueDescriptor(name: String): ValueDescriptor? {
-        return getValueDescriptor(Name.of(name))
-    }
-
-    fun getValueDescriptor(name: Name): ValueDescriptor? {
-        return if (name.length == 1) {
-            valueDescriptors()[name.unescaped]
-        } else {
-            getNodeDescriptor(name.cutLast())?.getValueDescriptor(name.last)
-        }
-    }
 
     /**
      * The map of children node descriptors
-     *
-     * @return
      */
-    fun childrenDescriptors(): Map<String, NodeDescriptor> {
+    val nodes: Map<String, NodeDescriptor>
-        val map = HashMap<String, NodeDescriptor>()
+        get() = config.getAll("node".toName()).entries.associate { (name, node) ->
-        if (meta.hasMeta("node")) {
+            name to NodeDescriptor.wrap(node.node ?: error("Node descriptor must be a node"))
-            for (node in meta.getMetaList("node")) {
-                val nd = NodeDescriptor(node)
-                map[nd.name] = nd
-            }
         }
-        return map
+
-    }
 
     /**
      * Check if this node has default
@@ -173,15 +122,14 @@ open class NodeDescriptor(val meta: Meta) : MetaRepr {
      */
     val key: String by stringValue(def = "")
 
-    override fun toMeta(): Meta {
-        return meta
-    }
 
     fun builder(): DescriptorBuilder = DescriptorBuilder(this.name, Configuration(this.meta))
 
     //override val descriptor: NodeDescriptor =  empty("descriptor")
 
-    companion object {
+    companion object : SpecificationCompanion<NodeDescriptor> {
+
+        override fun wrap(config: Config): NodeDescriptor = NodeDescriptor(config)
 
         fun empty(nodeName: String): NodeDescriptor {
             return NodeDescriptor(Meta.buildEmpty(nodeName))

dataforge-meta/src/jsMain/kotlin/hep/dataforge/meta/jsMeta.kt

@@ -0,0 +1,21 @@
+package hep.dataforge.meta
+
+
+
+
+fun Meta.toDynamic(): dynamic {
+    fun MetaItem<*>.toDynamic(): dynamic = when (this) {
+        is MetaItem.ValueItem -> this.value.value.asDynamic()
+        is MetaItem.NodeItem -> this.node.toDynamic()
+    }
+
+    val res = js("{}")
+    this.items.entries.groupBy { it.key.body }.forEach { (key, value) ->
+        val list = value.map { it.value }
+        res[key] = when (list.size) {
+            1 -> list.first().toDynamic()
+            else -> list.map { it.toDynamic() }
+        }
+    }
+    return res
+}