Fix naming conventions in names

CHANGELOG.md

@@ -26,6 +26,7 @@
 - Separate interfaces for `IOReader` and `IOWriter`
 
 ### Deprecated
+- Context.fetch -> Context.request
 
 ### Removed
 

dataforge-context/src/commonMain/kotlin/space/kscience/dataforge/context/AbstractPlugin.kt

@@ -11,6 +11,8 @@ public abstract class AbstractPlugin(override val meta: Meta = Meta.EMPTY) : Plu
     private var _context: Context? = null
     private val dependencies = HashMap<PluginFactory<*>, Meta>()
 
+    override val isAttached: Boolean = _context != null
+
     override val context: Context
         get() = _context ?: error("Plugin $tag is not attached")
 
@@ -27,7 +29,10 @@ public abstract class AbstractPlugin(override val meta: Meta = Meta.EMPTY) : Plu
     /**
      * Register plugin dependency and return a delegate which provides lazily initialized reference to dependent plugin
      */
-    protected fun <P : Plugin> require(factory: PluginFactory<P>, meta: Meta = Meta.EMPTY): ReadOnlyProperty<AbstractPlugin, P> {
+    protected fun <P : Plugin> require(
+        factory: PluginFactory<P>,
+        meta: Meta = Meta.EMPTY,
+    ): ReadOnlyProperty<AbstractPlugin, P> {
         dependencies[factory] = meta
         return PluginDependencyDelegate(factory.type)
     }
@@ -37,6 +42,7 @@ public fun <T : Named> Collection<T>.toMap(): Map<Name, T> = associate { it.name
 
 private class PluginDependencyDelegate<P : Plugin>(val type: KClass<out P>) : ReadOnlyProperty<AbstractPlugin, P> {
     override fun getValue(thisRef: AbstractPlugin, property: KProperty<*>): P {
+        if (!thisRef.isAttached) error("Plugin dependency must not be called eagerly during initialization.")
         return thisRef.context.plugins[type] ?: error("Plugin with type $type not found")
     }
 }

dataforge-context/src/commonMain/kotlin/space/kscience/dataforge/context/Plugin.kt

@@ -53,6 +53,8 @@ public interface Plugin : Named, ContextAware, Provider, MetaRepr {
      */
     public fun detach()
 
+    public val isAttached: Boolean
+
     override fun toMeta(): Meta = Meta {
         "context" put context.name.toString()
         "type" to this::class.simpleName

dataforge-context/src/commonMain/kotlin/space/kscience/dataforge/context/PluginManager.kt

@@ -13,7 +13,7 @@ import kotlin.reflect.KClass
  */
 public class PluginManager internal constructor(
     override val context: Context,
-    private val plugins: Set<Plugin>
+    private val plugins: Set<Plugin>,
 ) : ContextAware, Iterable<Plugin> {
 
     init {
@@ -81,12 +81,16 @@ public class PluginManager internal constructor(
  * Fetch a plugin with given meta from the context. If the plugin (with given meta) is already registered, it is returned.
  * Otherwise, new child context with the plugin is created. In the later case the context could be retrieved from the plugin.
  */
-public inline fun <reified T : Plugin> Context.fetch(factory: PluginFactory<T>, meta: Meta = Meta.EMPTY): T {
+public inline fun <reified T : Plugin> Context.request(factory: PluginFactory<T>, meta: Meta = Meta.EMPTY): T {
     val existing = plugins[factory]
     return if (existing != null && existing.meta == meta) existing
     else {
-        buildContext(name = this@fetch.name + factory.tag.name) {
+        buildContext(name = this@request.name + factory.tag.name) {
             plugin(factory, meta)
         }.plugins[factory]!!
     }
 }
+
+@Deprecated("Replace with request", ReplaceWith("request(factory, meta)"))
+public inline fun <reified T : Plugin> Context.fetch(factory: PluginFactory<T>, meta: Meta = Meta.EMPTY): T =
+    request(factory, meta)

dataforge-context/src/commonTest/kotlin/space/kscience/dataforge/context/ContextTest.kt

@@ -1,7 +1,7 @@
 package space.kscience.dataforge.context
 
 import space.kscience.dataforge.names.Name
-import space.kscience.dataforge.names.appendLeft
+import space.kscience.dataforge.names.appendFirst
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
@@ -26,7 +26,7 @@ class ContextTest {
         val members = context.gather<Name>("test")
         assertEquals(3, members.count())
         members.forEach {
-            assertEquals(it.key, it.value.appendLeft("test"))
+            assertEquals(it.key, it.value.appendFirst("test"))
         }
     }
 

dataforge-data/src/commonMain/kotlin/space/kscience/dataforge/data/Data.kt

@@ -73,7 +73,7 @@ private class LazyData<T : Any>(
     override val type: KType,
     override val meta: Meta = Meta.EMPTY,
     additionalContext: CoroutineContext = EmptyCoroutineContext,
-    dependencies: Collection<Data<*>> = emptyList(),
+    dependencies: Collection<Goal<*>> = emptyList(),
     block: suspend () -> T,
 ) : Data<T>, LazyGoal<T>(additionalContext, dependencies, block)
 
@@ -93,7 +93,7 @@ public fun <T : Any> Data(
     type: KType,
     meta: Meta = Meta.EMPTY,
     context: CoroutineContext = EmptyCoroutineContext,
-    dependencies: Collection<Data<*>> = emptyList(),
+    dependencies: Collection<Goal<*>> = emptyList(),
     block: suspend () -> T,
 ): Data<T> = LazyData(type, meta, context, dependencies, block)
 
@@ -102,6 +102,6 @@ public fun <T : Any> Data(
 public inline fun <reified T : Any> Data(
     meta: Meta = Meta.EMPTY,
     context: CoroutineContext = EmptyCoroutineContext,
-    dependencies: Collection<Data<*>> = emptyList(),
+    dependencies: Collection<Goal<*>> = emptyList(),
     noinline block: suspend () -> T,
 ): Data<T> = Data(typeOf<T>(), meta, context, dependencies, block)

dataforge-data/src/commonMain/kotlin/space/kscience/dataforge/data/dataFilter.kt

@@ -67,7 +67,7 @@ public fun <T : Any> DataSet<T>.withNamePrefix(prefix: Name): DataSet<T> = if (p
     }
 
     override fun get(name: Name): Data<T>? =
-        name.removeHeadOrNull(name)?.let { this@withNamePrefix.get(it) }
+        name.removeFirstOrNull(name)?.let { this@withNamePrefix.get(it) }
 
     override val updates: Flow<Name> get() = this@withNamePrefix.updates.map { prefix + it }
 }
@@ -87,7 +87,7 @@ public fun <T : Any> DataSet<T>.branch(branchName: Name): DataSet<T> = if (branc
 
     override fun iterator(): Iterator<NamedData<T>> = iterator {
         for (d in this@branch) {
-            d.name.removeHeadOrNull(branchName)?.let { name ->
+            d.name.removeFirstOrNull(branchName)?.let { name ->
                 yield(d.data.named(name))
             }
         }
@@ -95,7 +95,7 @@ public fun <T : Any> DataSet<T>.branch(branchName: Name): DataSet<T> = if (branc
 
     override fun get(name: Name): Data<T>? = this@branch.get(branchName + name)
 
-    override val updates: Flow<Name> get() = this@branch.updates.mapNotNull { it.removeHeadOrNull(branchName) }
+    override val updates: Flow<Name> get() = this@branch.updates.mapNotNull { it.removeFirstOrNull(branchName) }
 }
 
 public fun <T : Any> DataSet<T>.branch(branchName: String): DataSet<T> = this@branch.branch(branchName.parseAsName())

dataforge-io/src/commonMain/kotlin/space/kscience/dataforge/io/Envelope.kt

@@ -36,6 +36,8 @@ public interface Envelope {
 
 public class SimpleEnvelope(override val meta: Meta, override val data: Binary?) : Envelope
 
+public fun Envelope(meta: Meta, data: Binary?): Envelope = SimpleEnvelope(meta, data)
+
 /**
  * The purpose of the envelope
  *

dataforge-io/src/commonMain/kotlin/space/kscience/dataforge/io/IOPlugin.kt

@@ -7,8 +7,11 @@ import space.kscience.dataforge.io.MetaFormatFactory.Companion.META_FORMAT_TYPE
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.get
 import space.kscience.dataforge.meta.string
+import space.kscience.dataforge.misc.DFInternal
 import space.kscience.dataforge.names.Name
 import kotlin.reflect.KClass
+import kotlin.reflect.KType
+import kotlin.reflect.typeOf
 
 public class IOPlugin(meta: Meta) : AbstractPlugin(meta) {
     override val tag: PluginTag get() = Companion.tag
@@ -17,15 +20,15 @@ public class IOPlugin(meta: Meta) : AbstractPlugin(meta) {
         context.gather<IOFormatFactory<*>>(IO_FORMAT_TYPE).values
     }
 
-    public fun <T : Any> resolveIOFormat(item: Meta, type: KClass<out T>): IOFormat<T>? {
-        val key = item.string ?: item[IOFormatFactory.NAME_KEY]?.string ?: error("Format name not defined")
-        val name = Name.parse(key)
-        return ioFormatFactories.find { it.name == name }?.let {
-            @Suppress("UNCHECKED_CAST")
-            if (it.type != type) error("Format type ${it.type} is not the same as requested type $type")
-            else it.build(context, item[IOFormatFactory.META_KEY] ?: Meta.EMPTY) as IOFormat<T>
-        }
-    }
+    @Suppress("UNCHECKED_CAST")
+    @DFInternal
+    public fun <T : Any> resolveIOFormat(type: KType, meta: Meta): IOFormat<T>? =
+        ioFormatFactories.singleOrNull { it.type == type }?.build(context, meta) as? IOFormat<T>
+
+    @OptIn(DFInternal::class)
+    public inline fun <reified T : Any> resolveIOFormat(meta: Meta = Meta.EMPTY): IOFormat<T>? =
+        resolveIOFormat(typeOf<T>(), meta)
+
 
     public val metaFormatFactories: Collection<MetaFormatFactory> by lazy {
         context.gather<MetaFormatFactory>(META_FORMAT_TYPE).values
@@ -79,7 +82,7 @@ internal val ioContext = Context("IO") {
 
 public val Context.io: IOPlugin
     get() = if (this == Global) {
-        ioContext.fetch(IOPlugin)
+        ioContext.request(IOPlugin)
     } else {
-        fetch(IOPlugin)
+        request(IOPlugin)
     }

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

@@ -25,7 +25,7 @@ private class ObservableMetaWrapper(
         listeners.add(
             MetaListener(Pair(owner, absoluteName)) { name ->
                 if (name.startsWith(absoluteName)) {
-                    (this[absoluteName] ?: Meta.EMPTY).callback(name.removeHeadOrNull(absoluteName)!!)
+                    (this[absoluteName] ?: Meta.EMPTY).callback(name.removeFirstOrNull(absoluteName)!!)
                 }
             }
         )

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

@@ -96,7 +96,7 @@ public open class Scheme : Described, MetaRepr, MutableMetaProvider, Configurabl
         override fun onChange(owner: Any?, callback: Meta.(name: Name) -> Unit) {
             listeners.add(MetaListener(owner) { changedName ->
                 if (changedName.startsWith(pathName)) {
-                    this@Scheme.meta.callback(changedName.removeHeadOrNull(pathName)!!)
+                    this@Scheme.meta.callback(changedName.removeFirstOrNull(pathName)!!)
                 }
             })
         }

dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/names/Name.kt

@@ -159,8 +159,14 @@ public operator fun Name.plus(other: String): Name = this + Name.parse(other)
 
 public operator fun Name.plus(other: NameToken): Name = Name(tokens + other)
 
+@Deprecated(
+    "Use appendFirst instead",
+    ReplaceWith("appendFirst(other)")
+)
 public fun Name.appendLeft(other: String): Name = NameToken(other) + this
 
+public fun Name.appendFirst(other: String): Name = NameToken(other) + this
+
 public fun NameToken.asName(): Name = Name(listOf(this))
 
 public fun Name.isEmpty(): Boolean = this.length == 0
@@ -202,12 +208,26 @@ public fun Name.endsWith(name: Name): Boolean =
 /**
  * if [this] starts with given [head] name, returns the reminder of the name (could be empty). Otherwise, returns null
  */
+@Deprecated(
+    "Use removeFirstOrNull instead",
+    ReplaceWith("removeFirstOrNull(head)")
+)
 public fun Name.removeHeadOrNull(head: Name): Name? = if (startsWith(head)) {
     Name(tokens.subList(head.length, length))
 } else {
     null
 }
 
+/**
+ * if [this] starts with given [first] name, returns the reminder of the name (could be empty). Otherwise, returns null
+ */
+public fun Name.removeFirstOrNull(first: Name): Name? = if (startsWith(first)) {
+    Name(tokens.subList(first.length, length))
+} else {
+    null
+}
+
+
 @ThreadLocal
 private val nameCache = HashMap<String, Name>()
 

dataforge-workspace/src/commonMain/kotlin/space/kscience/dataforge/workspace/Task.kt

@@ -25,7 +25,7 @@ public interface Task<out T : Any> : Described {
     /**
      * A task identification string used to compare tasks and check task body for change
      */
-    public val fingerprint: String get() = hashCode().toString()
+    public val fingerprint: String get() = hashCode().toString(radix = 16)
 
     /**
      * Compute a [TaskResult] using given meta. In general, the result is lazy and represents both computation model

dataforge-workspace/src/commonMain/kotlin/space/kscience/dataforge/workspace/TaskData.kt

@@ -42,6 +42,6 @@ private class TaskDataImpl<out T : Any>(
 //    }
 }
 
-public fun <T : Any> Workspace.wrapData(data: Data<T>, name: Name, taskName: Name, stageMeta: Meta): TaskData<T> =
-    TaskDataImpl(this, data, name, taskName, stageMeta)
+public fun <T : Any> Workspace.wrapData(data: Data<T>, name: Name, taskName: Name, taskMeta: Meta): TaskData<T> =
+    TaskDataImpl(this, data, name, taskName, taskMeta)
 

dataforge-workspace/src/commonMain/kotlin/space/kscience/dataforge/workspace/TaskResult.kt

@@ -25,14 +25,15 @@ public interface TaskResult<out T : Any> : DataSet<T> {
     public val taskMeta: Meta
 
     override fun iterator(): Iterator<TaskData<T>>
+
     override fun get(name: Name): TaskData<T>?
 }
 
 private class TaskResultImpl<out T : Any>(
     override val workspace: Workspace,
-    val dataSet: DataSet<T>,
     override val taskName: Name,
     override val taskMeta: Meta,
+    val dataSet: DataSet<T>,
 ) : TaskResult<T>, DataSet<T> by dataSet {
 
     override fun iterator(): Iterator<TaskData<T>> = iterator {
@@ -41,7 +42,7 @@ private class TaskResultImpl<out T : Any>(
         }
     }
 
-    override fun get(name: Name): TaskData<T>? = dataSet.get(name)?.let {
+    override fun get(name: Name): TaskData<T>? = dataSet[name]?.let {
         workspace.wrapData(it, name, taskName, taskMeta)
     }
 }
@@ -50,4 +51,4 @@ private class TaskResultImpl<out T : Any>(
  * Wrap data into [TaskResult]
  */
 public fun <T : Any> Workspace.wrapResult(dataSet: DataSet<T>, taskName: Name, taskMeta: Meta): TaskResult<T> =
-    TaskResultImpl(this, dataSet, taskName, taskMeta)
+    TaskResultImpl(this, taskName, taskMeta, dataSet)

gradle.properties

@@ -5,4 +5,4 @@ kotlin.code.style=official
 kotlin.mpp.stability.nowarn=true
 kotlin.incremental.js.ir=true
 
-toolsVersion=0.13.0-kotlin-1.7.20-Beta
+toolsVersion=0.13.3-kotlin-1.7.20