Meta subtyping and get by empty name.
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@ -66,8 +66,14 @@ interface Meta : MetaRepr {
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/* Get operations*/
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/**
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* Perform recursive item search using given [name]. Each [NameToken] is treated as a name in [Meta.items] of a parent node.
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*
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* If [name] is empty reture current [Meta] as a [NodeItem]
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*/
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operator fun Meta?.get(name: Name): MetaItem<*>? {
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if (this == null) return null
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if (name.isEmpty()) return NodeItem(this)
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return name.first()?.let { token ->
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val tail = name.cutFirst()
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when (tail.length) {
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@ -78,6 +84,9 @@ operator fun Meta?.get(name: Name): MetaItem<*>? {
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}
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operator fun Meta?.get(token: NameToken): MetaItem<*>? = this?.items?.get(token)
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/**
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* Parse [Name] from [key] using full name notation and pass it to [Meta.get]
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*/
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operator fun Meta?.get(key: String): MetaItem<*>? = get(key.toName())
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/**
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@ -113,12 +122,16 @@ operator fun Meta.iterator(): Iterator<Pair<Name, MetaItem<*>>> = sequence().ite
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/**
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* A meta node that ensures that all of its descendants has at least the same type
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*/
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interface MetaNode<M : MetaNode<M>> : Meta {
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interface MetaNode<out M : MetaNode<M>> : Meta {
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override val items: Map<NameToken, MetaItem<M>>
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}
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operator fun <M : MetaNode<M>> MetaNode<M>?.get(name: Name): MetaItem<M>? {
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/**
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* The same as [Meta.get], but with specific node type
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*/
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operator fun <M : MetaNode<M>> M?.get(name: Name): MetaItem<M>? {
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if (this == null) return null
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if (name.isEmpty()) return NodeItem(this)
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return name.first()?.let { token ->
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val tail = name.cutFirst()
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when (tail.length) {
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@ -128,17 +141,9 @@ operator fun <M : MetaNode<M>> MetaNode<M>?.get(name: Name): MetaItem<M>? {
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}
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}
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operator fun <M : MetaNode<M>> MetaNode<M>?.get(key: String): MetaItem<M>? = if (this == null) {
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null
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} else {
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this[key.toName()]
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}
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operator fun <M : MetaNode<M>> M?.get(key: String): MetaItem<M>? = this[key.toName()]
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operator fun <M : MetaNode<M>> MetaNode<M>?.get(key: NameToken): MetaItem<M>? = if (this == null) {
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null
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} else {
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this[key.asName()]
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}
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operator fun <M : MetaNode<M>> M?.get(key: NameToken): MetaItem<M>? = this[key.asName()]
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/**
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* Equals, hashcode and to string for any meta
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@ -3,7 +3,7 @@ package hep.dataforge.meta
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import hep.dataforge.names.*
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import hep.dataforge.values.Value
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interface MutableMeta<M : MutableMeta<M>> : MetaNode<M> {
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interface MutableMeta<out M : MutableMeta<M>> : MetaNode<M> {
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override val items: Map<NameToken, MetaItem<M>>
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operator fun set(name: Name, item: MetaItem<*>?)
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// fun onChange(owner: Any? = null, action: (Name, MetaItem<*>?, MetaItem<*>?) -> Unit)
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@ -54,13 +54,14 @@ abstract class AbstractMutableMeta<M : MutableMeta<M>> : AbstractMetaNode<M>(),
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0 -> error("Can't setValue meta item for empty name")
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1 -> {
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val token = name.first()!!
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replaceItem(token, get(name), wrapItem(item))
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@Suppress("UNCHECKED_CAST") val oldItem: MetaItem<M>? = get(name) as? MetaItem<M>
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replaceItem(token, oldItem, wrapItem(item))
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}
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else -> {
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val token = name.first()!!
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//get existing or create new node. Query is ignored for new node
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if(items[token] == null){
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replaceItem(token,null, MetaItem.NodeItem(empty()))
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if (items[token] == null) {
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replaceItem(token, null, MetaItem.NodeItem(empty()))
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}
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items[token]?.node!![name.cutFirst()] = item
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}
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@ -71,6 +72,7 @@ abstract class AbstractMutableMeta<M : MutableMeta<M>> : AbstractMetaNode<M>(),
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@Suppress("NOTHING_TO_INLINE")
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inline fun MutableMeta<*>.remove(name: Name) = set(name, null)
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@Suppress("NOTHING_TO_INLINE")
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inline fun MutableMeta<*>.remove(name: String) = remove(name.toName())
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