Utility methods to access Configurable properties

build.gradle.kts

@@ -1,12 +1,12 @@
 
 plugins {
-    val toolsVersion = "0.4.0-dev"
+    val toolsVersion = "0.4.0"
     id("scientifik.mpp") version toolsVersion apply false
     id("scientifik.jvm") version toolsVersion apply false
     id("scientifik.publish") version toolsVersion apply false
 }
 
-val dataforgeVersion by extra("0.1.5-dev-11")
+val dataforgeVersion by extra("0.1.5")
 
 val bintrayRepo by extra("dataforge")
 val githubProject by extra("dataforge-core")

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

@@ -67,6 +67,7 @@ fun ItemDescriptor.validateItem(item: MetaItem<*>?): Boolean {
  *
  * @author Alexander Nozik
  */
+@DFBuilder
 class NodeDescriptor : ItemDescriptor() {
 
     /**

dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/scheme/Configurable.kt

@@ -32,34 +32,37 @@ interface Configurable : Described {
     }
 
     override val descriptor: NodeDescriptor? get() = null
-}
 
     /**
      * Get a property with default
      */
-fun Configurable.getProperty(name: Name): MetaItem<*>? =
+    fun getProperty(name: Name): MetaItem<*>? =
         config[name] ?: getDefaultItem(name) ?: descriptor?.get(name)?.defaultItem()
 
-fun Configurable.getProperty(key: String) = getProperty(key.toName())
-
     /**
      * Set a configurable property
      */
-fun Configurable.setProperty(name: Name, item: MetaItem<*>?) {
+    fun setProperty(name: Name, item: MetaItem<*>?) {
         if (validateItem(name, item)) {
             config[name] = item
         } else {
             error("Validation failed for property $name with value $item")
         }
     }
+}
 
-fun Configurable.setProperty(name: Name, value: Value) = setProperty(name, MetaItem.ValueItem(value))
+fun Configurable.getProperty(key: String) = getProperty(key.toName())
-fun Configurable.setProperty(name: Name, meta: Meta) = setProperty(name, MetaItem.NodeItem(meta))
+
+fun Configurable.setProperty(name: Name, value: Value?) = setProperty(name, value?.let { MetaItem.ValueItem(value) })
+fun Configurable.setProperty(name: Name, meta: Meta?) = setProperty(name, meta?.let { MetaItem.NodeItem(meta) })
 
 fun Configurable.setProperty(key: String, item: MetaItem<*>?) {
     setProperty(key.toName(), item)
 }
 
+fun Configurable.setProperty(key: String, value: Value?) = setProperty(key, value?.let { MetaItem.ValueItem(value) })
+fun Configurable.setProperty(key: String, meta: Meta?) = setProperty(key, meta?.let { MetaItem.NodeItem(meta) })
+
 fun <T : Configurable> T.configure(meta: Meta): T = this.apply { config.update(meta) }
 
 inline fun <T : Configurable> T.configure(action: Config.() -> Unit): T = apply { config.apply(action) }

dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/scheme/ConfigurableDelegate.kt

@@ -206,8 +206,9 @@ fun Configurable.node(key: Name? = null): ReadWriteProperty<Any?, Meta?> = item(
     writer = { it?.let { MetaItem.NodeItem(it) } }
 )
 
-fun <T : Configurable> Configurable.spec(spec: Specification<T>, key: Name? = null): ReadWriteProperty<Any?, T?> =
+fun <T : Configurable> Configurable.spec(
-    object : ReadWriteProperty<Any?, T?> {
+    spec: Specification<T>, key: Name? = null
+): ReadWriteProperty<Any?, T?> = object : ReadWriteProperty<Any?, T?> {
     override fun getValue(thisRef: Any?, property: KProperty<*>): T? {
         val name = key ?: property.name.asName()
         return config[name].node?.let { spec.wrap(it) }
@@ -217,6 +218,19 @@ fun <T : Configurable> Configurable.spec(spec: Specification<T>, key: Name? = nu
         val name = key ?: property.name.asName()
         config[name] = value?.config
     }
-
+}
+
+fun <T : Configurable> Configurable.spec(
+    spec: Specification<T>, default: T, key: Name? = null
+): ReadWriteProperty<Any?, T> = object : ReadWriteProperty<Any?, T> {
+    override fun getValue(thisRef: Any?, property: KProperty<*>): T {
+        val name = key ?: property.name.asName()
+        return config[name].node?.let { spec.wrap(it) }?:default
+    }
+
+    override fun setValue(thisRef: Any?, property: KProperty<*>, value: T) {
+        val name = key ?: property.name.asName()
+        config[name] = value.config
+    }
 }
 

dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/scheme/Scheme.kt

@@ -18,11 +18,10 @@ open class Scheme() : Configurable, Described, MetaRepr {
     //constructor(config: Config, default: Meta) : this(config, { default[it] })
     constructor(config: Config) : this(config, { null })
 
-    final override var config: Config =
+    final override var config: Config = Config()
-        Config()
         internal set
 
-    lateinit var defaultProvider: (Name) -> MetaItem<*>?
+    var defaultProvider: (Name) -> MetaItem<*>? = { null }
         internal set
 
     final override var descriptor: NodeDescriptor? = null
@@ -53,9 +52,10 @@ open class Scheme() : Configurable, Described, MetaRepr {
                 token to item
             } ?: emptyMap()
     }
-
 }
 
+inline operator fun <T : Scheme> T.invoke(block: T.() -> Unit) = apply(block)
+
 /**
  * A specification for simplified generation of wrappers
  */