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Code Issues Releases Wiki Activity

Add a Transformation class that replaces java.util.function use

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This commit is contained in:
Danila Fedorin
2017-09-24 00:29:43 -07:00
parent 0511c58b13
commit 378ff946d9
6 changed files with 33 additions and 13 deletions
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3
core/src/main/kotlin/org/nwapw/abacus/number/promotion/NumberUtils.kt
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@@ -3,7 +3,6 @@ package org.nwapw.abacus.number.promotion
import org.nwapw.abacus.number.NumberInterface
typealias PromotionFunction = java.util.function.Function<NumberInterface, NumberInterface>
typealias PromotionPath = List<PromotionFunction>
typealias NumberClass = Class<NumberInterface>
@@ -14,5 +13,5 @@ typealias NumberClass = Class<NumberInterface>
* @param from the number to start from.
*/
fun PromotionPath.promote(from: NumberInterface): NumberInterface {
return fold(from, { current, function -> function.apply(current) })
return fold(from, { current, function -> function.promote(current) })
}

20
core/src/main/kotlin/org/nwapw/abacus/number/promotion/PromotionFunction.kt Normal file
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@@ -0,0 +1,20 @@
package org.nwapw.abacus.number.promotion
import org.nwapw.abacus.number.NumberInterface
/**
* Function that is used to promote a number from one type to another.
*
* A promotion function is used in the promotion system as a mean to
* actually "travel" down the promotion path.
*/
interface PromotionFunction {
/**
* Promotes the given [number] into another type.
* @param number the number to promote from.
* @return the new number with the same value.
*/
fun promote(number: NumberInterface): NumberInterface
}

7
core/src/main/kotlin/org/nwapw/abacus/number/promotion/PromotionManager.kt
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@@ -6,7 +6,6 @@ import org.nwapw.abacus.number.NumberInterface
import org.nwapw.abacus.plugin.NumberImplementation
import org.nwapw.abacus.plugin.PluginListener
import org.nwapw.abacus.plugin.PluginManager
import java.util.function.Function
/**
* A class that handles promotions based on priority and the
@@ -32,7 +31,11 @@ class PromotionManager(val abacus: Abacus) : PluginListener {
val fromName = abacus.pluginManager.interfaceImplementationNameFor(from.implementation)
val toName = abacus.pluginManager.interfaceImplementationNameFor(to.implementation)
if(fromName == toName) return listOf(Function { it })
if(fromName == toName) return listOf(object : PromotionFunction {
override fun promote(number: NumberInterface): NumberInterface {
return number
}
})
if(from.promotionPaths.containsKey(toName))
return listOf(from.promotionPaths[toName] ?: return null)