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Add a promotion manager to handle promotion.

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This commit is contained in:
Danila Fedorin 2017-09-01 17:15:14 -07:00
parent 453cd0ea77
commit ecb5139e70
1 changed files with 39 additions and 0 deletions
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39
core/src/main/kotlin/org/nwapw/abacus/number/PromotionManager.kt Normal file
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package org.nwapw.abacus.number
import org.nwapw.abacus.Abacus
import org.nwapw.abacus.plugin.NumberImplementation
import java.util.function.Function
class PromotionManager(val abacus: Abacus) {
val computePaths = mutableMapOf<Pair<NumberImplementation, NumberImplementation>, PromotionPath?>()
fun computePathBetween(from: NumberImplementation, to: NumberImplementation): PromotionPath? {
val fromName = abacus.pluginManager.interfaceImplementationNameFor(from.implementation)
val toName = abacus.pluginManager.interfaceImplementationNameFor(to.implementation)
if(fromName == toName) return listOf(Function { it })
if(from.promotionPaths.containsKey(toName))
return listOf(from.promotionPaths[toName] ?: return null)
return null
}
fun getPathBetween(from: NumberImplementation, to: NumberImplementation): PromotionPath? {
return computePaths.computeIfAbsent(from to to, {
computePathBetween(it.first, it.second)
})
}
fun promote(vararg numbers: NumberInterface): Array<NumberInterface>? {
val pluginManager = abacus.pluginManager
val implementations = numbers.map { pluginManager.interfaceImplementationFor(it.javaClass) }
val highestPriority = implementations.sortedBy { it.priority }.last()
return numbers.map {
if(it.javaClass == highestPriority.implementation) it
else getPathBetween(pluginManager.interfaceImplementationFor(it.javaClass), highestPriority)
?.promote(it) ?: return null
}.toTypedArray()
}
}