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Support static field INSTANCE for JavaPlugin

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This commit is contained in:
Him188 2020-09-01 22:46:51 +08:00
parent fdc6ef8a35
commit c29b58d728
1 changed files with 10 additions and 3 deletions
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13
backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/internal/util/ServiceHelper.kt
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@ -12,7 +12,9 @@ package net.mamoe.mirai.console.internal.util
import net.mamoe.mirai.console.internal.data.cast
import net.mamoe.mirai.console.internal.data.createInstanceOrNull
import java.io.InputStream
import java.lang.reflect.Modifier
import kotlin.reflect.KClass
import java.lang.reflect.Member as JReflectionMember
@Suppress("unused")
internal class ServiceList<T>(
@ -37,13 +39,16 @@ internal object ServiceHelper {
fun <T : Any> ClassLoader.loadService(
classname: String
): T? {
@Suppress("UNCHECKED_CAST")
return kotlin.runCatching {
val clazz =
Class.forName(classname, true, this).cast<Class<out T>>()
@Suppress("UNCHECKED_CAST")
clazz.kotlin.objectInstance
?: kotlin.runCatching {
clazz.declaredFields.firstOrNull { it.isStatic() && it.name == "INSTANCE" }?.get(null)
}.getOrNull()
?: clazz.kotlin.createInstanceOrNull()
?: clazz.constructors.firstOrNull { it.parameterCount == 0 }?.newInstance() as T?
?: clazz.constructors.firstOrNull { it.parameterCount == 0 }?.newInstance()
?: error("Cannot find a no-arg constructor")
}.getOrElse {
throw ServiceLoadException("Could not load service ${classname}.", it)
@ -53,10 +58,12 @@ internal object ServiceHelper {
{ "Could not load PluginLoader ${pluginQualifiedName}." },
PluginLoadException("Could not load PluginLoader ${pluginQualifiedName}.", it)
)*/
}
} as T?
}
}
internal fun JReflectionMember.isStatic(): Boolean = this.modifiers.and(Modifier.STATIC) != 0
@Suppress("unused", "RedundantVisibilityModifier")
internal open class ServiceLoadException : RuntimeException {
public constructor() : super()