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MetaTransformation update

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This commit is contained in:
Alexander Nozik 2019-06-01 20:21:19 +03:00
parent d08e1ee57d
commit 846ad4582f
1 changed files with 24 additions and 8 deletions
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32
dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MetaTransformation.kt
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@ -1,7 +1,6 @@
package hep.dataforge.meta package hep.dataforge.meta
import hep.dataforge.names.Name import hep.dataforge.names.Name
import hep.dataforge.names.startsWith
/** /**
* A transformation for meta item or a group of items * A transformation for meta item or a group of items
@ -63,9 +62,9 @@ data class SingleItemTransformationRule(
} }
} }
data class RegexpItemTransformationRule( data class RegexItemTransformationRule(
val from: Regex, val from: Regex,
val transform: MutableMeta<*>.(MatchResult, MetaItem<*>?) -> Unit val transform: MutableMeta<*>.(name: Name, MatchResult, MetaItem<*>?) -> Unit
) : TransformationRule { ) : TransformationRule {
override fun matches(name: Name, item: MetaItem<*>?): Boolean { override fun matches(name: Name, item: MetaItem<*>?): Boolean {
return from.matches(name.toString()) return from.matches(name.toString())
@ -74,7 +73,7 @@ data class RegexpItemTransformationRule(
override fun <M : MutableMeta<M>> transformItem(name: Name, item: MetaItem<*>?, target: M) { override fun <M : MutableMeta<M>> transformItem(name: Name, item: MetaItem<*>?, target: M) {
val match = from.matchEntire(name.toString()) val match = from.matchEntire(name.toString())
if (match != null) { if (match != null) {
target.transform(match, item) target.transform(name, match, item)
} }
} }
@ -122,7 +121,8 @@ inline class MetaTransformation(val transformations: Collection<TransformationRu
} }
companion object { companion object {
fun make(block: MetaTransformationBuilder.() -> Unit): MetaTransformation =
MetaTransformationBuilder().apply(block).build()
} }
} }
@ -143,12 +143,28 @@ class MetaTransformationBuilder {
* Keep specific item (including its descendants) * Keep specific item (including its descendants)
*/ */
fun keep(name: Name) { fun keep(name: Name) {
keep{it == name} keep { it == name }
} }
fun move(from: Name, to: Name){ /**
* Keep nodes by regex
*/
fun keep(regex: String) {
transformations.add(RegexItemTransformationRule(regex.toRegex()) { name, _, metaItem ->
setItem(name, metaItem)
})
}
/**
* Move an item from [from] to [to], optionally applying [operation] it defined
*/
fun move(from: Name, to: Name, operation: (MetaItem<*>?) -> Any? = { it }) {
transformations.add( transformations.add(
SingleItemTransformationRule(from){ _, item -> setItem(to, item)} SingleItemTransformationRule(from) { _, item ->
set(to, operation(item))
}
) )
} }
fun build() = MetaTransformation(transformations)
} }