Object EventBusSubscriber registration (#34)

* Object EventBusSubscriber registration

* Register from construction and handle companion objects

* Rename construction event listener

* Syntax changes

* Add test mod
This commit is contained in:
gegy1000 2018-05-21 15:36:15 +02:00 committed by Shadowfacts
parent 68c718fe57
commit 438c604d52
3 changed files with 108 additions and 1 deletions

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@ -1,6 +1,10 @@
package net.shadowfacts.forgelin
import net.minecraftforge.fml.common.FMLCommonHandler
import net.minecraftforge.fml.common.Loader
import net.minecraftforge.fml.common.Mod
import net.minecraftforge.fml.common.Mod.EventHandler
import net.minecraftforge.fml.common.event.FMLConstructionEvent
/**
* @author shadowfacts
@ -12,4 +16,10 @@ object Forgelin {
const val NAME = "Forgelin"
const val VERSION = "@VERSION@"
}
@EventHandler
fun onConstruction(event: FMLConstructionEvent) {
Loader.instance().modList.forEach {
ForgelinAutomaticEventSubscriber.subscribeAutomatic(it, event.asmHarvestedData, FMLCommonHandler.instance().side)
}
}
}

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@ -0,0 +1,78 @@
package net.shadowfacts.forgelin
import net.minecraftforge.common.MinecraftForge
import net.minecraftforge.fml.common.Loader
import net.minecraftforge.fml.common.LoaderException
import net.minecraftforge.fml.common.Mod
import net.minecraftforge.fml.common.ModContainer
import net.minecraftforge.fml.common.discovery.ASMDataTable
import net.minecraftforge.fml.common.discovery.ASMDataTable.ASMData
import net.minecraftforge.fml.common.discovery.asm.ModAnnotation.EnumHolder
import net.minecraftforge.fml.relauncher.Side
import org.apache.logging.log4j.LogManager
import java.util.EnumSet
import kotlin.reflect.full.companionObjectInstance
object ForgelinAutomaticEventSubscriber {
private val DEFAULT_SUBSCRIPTION_SIDES = EnumSet.allOf(Side::class.java)
private val LOGGER = LogManager.getLogger(ForgelinAutomaticEventSubscriber::class.java)
fun subscribeAutomatic(mod: ModContainer, asm: ASMDataTable, currentSide: Side) {
LOGGER.debug("Attempting to register Kotlin @EventBusSubscriber objects for {}", mod.modId)
val modAnnotations = asm.getAnnotationsFor(mod) ?: return
val containedMods = modAnnotations.get(Mod::class.java.name)
val subscribers = modAnnotations.get(Mod.EventBusSubscriber::class.java.name)
.filter { parseTargetSides(it).contains(currentSide) }
val loader = Loader.instance().modClassLoader
for (subscriber in subscribers) {
try {
val ownerModId = parseModId(containedMods, subscriber)
if (ownerModId.isNullOrEmpty()) {
LOGGER.warn("Could not determine owning mod for @EventBusSubscriber on {} for mod {}", subscriber.className, mod.modId)
continue
}
if (mod.modId != ownerModId) {
LOGGER.debug("Skipping @EventBusSubscriber injection for {} since it is not for mod {}", subscriber.className, mod.modId)
continue
}
LOGGER.debug("Registering @EventBusSubscriber object for {} for mod {}", subscriber.className, mod.modId)
val subscriberClass = Class.forName(subscriber.className, false, loader)?.kotlin ?: continue
val subscriberInstance = subscriberClass.objectInstance ?: subscriberClass.companionObjectInstance ?: continue
MinecraftForge.EVENT_BUS.register(subscriberInstance)
LOGGER.debug("Registered @EventBusSubscriber object {}", subscriber.className)
} catch (e: Throwable) {
LOGGER.error("An error occurred trying to load an @EventBusSubscriber object {} for modid {}", mod.modId, e)
throw LoaderException(e)
}
}
}
private fun parseModId(containedMods: MutableSet<ASMData>, subscriber: ASMData): String? {
val parsedModId: String? = subscriber.annotationInfo["modid"] as? String
if (parsedModId.isNullOrEmpty()) {
return parsedModId
}
return ASMDataTable.getOwnerModID(containedMods, subscriber)
}
private fun parseTargetSides(subscriber: ASMData): EnumSet<Side> {
val parsedSides: List<EnumHolder>? = subscriber.annotationInfo["value"] as? List<EnumHolder>
if (parsedSides != null) {
val targetSides = EnumSet.noneOf(Side::class.java)
for (parsed in parsedSides) {
targetSides.add(Side.valueOf(parsed.value))
}
return targetSides
}
return DEFAULT_SUBSCRIPTION_SIDES
}
}

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@ -0,0 +1,19 @@
package net.shadowfacts.forgelin
import net.minecraftforge.event.entity.player.PlayerInteractEvent.RightClickBlock
import net.minecraftforge.fml.common.Mod
import net.minecraftforge.fml.common.Mod.EventBusSubscriber
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent
@Mod(modid = AutomaticKtSubscriberTest.MODID, modLanguageAdapter = "net.shadowfacts.forgelin.KotlinAdapter")
object AutomaticKtSubscriberTest {
const val MODID = "ktsubtest"
@EventBusSubscriber(modid = AutomaticKtSubscriberTest.MODID)
object EventSubscriber {
@SubscribeEvent
fun onRightClickBlock(event: RightClickBlock) {
println("Automatic KT subscriber: Right click ${event.pos}")
}
}
}