1 files changed, 57 insertions, 0 deletions
diff --git a/src/main/kotlin/me/bush/illnamethislater/Util.kt b/src/main/kotlin/me/bush/illnamethislater/Util.kt
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+++ b/src/main/kotlin/me/bush/illnamethislater/Util.kt
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+package me.bush.illnamethislater
+
+import java.lang.reflect.Modifier
+import java.util.concurrent.atomic.AtomicInteger
+import java.util.concurrent.atomic.AtomicLong
+import kotlin.reflect.KCallable
+import kotlin.reflect.KClass
+import kotlin.reflect.KProperty
+import kotlin.reflect.full.allSuperclasses
+import kotlin.reflect.full.declaredMembers
+import kotlin.reflect.full.starProjectedType
+import kotlin.reflect.jvm.javaField
+import kotlin.reflect.jvm.javaGetter
+
+// @author bush
+// @since 3/13/2022
+
+/**
+ * Using [KClass.members] only returns public members, and
+ * using [KClass.declaredMembers] doesn't return inherited
+ * members. This returns all members, private and inherited.
+ */
+internal val <T : Any> KClass<T>.allMembers
+    get() = declaredMembers + allSuperclasses.flatMap { it.declaredMembers }
+
+/**
+ * Checks if a [KCallable] is static on the jvm, and handles invocation accordingly.
+ *
+ * I am not aware of a better alternative that works with `object` classes.
+ */
+internal fun <R> KCallable<R>.handleCall(receiver: Any) = if (static) call() else call(receiver)
+
+/**
+ * Checks if the calling [KCallable] is a static java field.
+ *
+ * Because kotlin likes to be funny, properties belonging to
+ * `object` classes are static, but their getters are not.
+ *
+ * If there is a getter (the property is not private),
+ * we will be accessing it through that, so we can stop checking.
+ *
+ * Otherwise, we check if the field is static with java reflection.
+ */
+internal val KCallable<*>.static
+    get() = if (this !is KProperty<*> || javaGetter != null) false
+    else javaField?.let { Modifier.isStatic(it.modifiers) } ?: false
+
+@Suppress("UNCHECKED_CAST") // This cannot fail
+internal inline fun <reified T : Any> List<KCallable<*>>.filterReturnType() =
+    filter { it.returnType == T::class.starProjectedType } as List<KCallable<T>>
+
+/**
+ * A simple class returned as a "key" for listeners that are not
+ * members of a class, just to make its intentions clearer. This
+ * can be used in [EventBus.unsubscribe] to remove the listener.
+ */
+internal class ListenerKey
+\ No newline at end of file