docs: more code docs

Author: zambrovski

kotlin/src/main/kotlin/org/axonframework/extensions/kotlin/EventUpcaster.kt

@@ -24,6 +24,9 @@ import org.axonframework.serialization.upcasting.event.IntermediateEventRepresen
 import org.axonframework.serialization.upcasting.event.SingleEventUpcaster
 import kotlin.reflect.KClass
 
+/**
+ * Helpers for event upcaster.
+ */
 object EventUpcaster {
     /**
      * Creates a singleEventUpcaster for given type and revisions and calls [IntermediateEventRepresentation#upcastPayload] using the [converter].

kotlin/src/main/kotlin/org/axonframework/extensions/kotlin/GenericEventMessageExtensions.kt

@@ -21,6 +21,12 @@ package org.axonframework.extensions.kotlin
 
 import org.axonframework.eventhandling.GenericEventMessage
 
+/**
+ * Extensions for generic message handling.
+ */
 object GenericEventMessageExtensions {
+    /**
+     * Reified version of asEventMessage.
+     */
     inline fun <reified P> asEventMessage(event: Any) = GenericEventMessage.asEventMessage<P>(event)
 }

kotlin/src/main/kotlin/org/axonframework/extensions/kotlin/QueryGatewayExtensions.kt

@@ -25,18 +25,27 @@ import java.util.*
 import java.util.concurrent.CompletableFuture
 
 /**
- * Extensiond to access query gateway.
+ * Extensions to access query gateway.
  */
 object QueryGatewayExtensions {
 
+    /**
+     * Reified version of queryForMultiple.
+     */
     inline fun <reified R, reified Q> QueryGateway.queryForMultiple(queryName: String, query: Q): CompletableFuture<List<R>> {
         return this.query(queryName, query, ResponseTypes.multipleInstancesOf(R::class.java))
     }
 
+    /**
+     * Reified version of queryForSingle.
+     */
     inline fun <reified R, reified Q> QueryGateway.queryForSingle(queryName: String, query: Q): CompletableFuture<R> {
         return this.query(queryName, query, ResponseTypes.instanceOf(R::class.java))
     }
 
+    /**
+     * Reified version of queryForOptional.
+     */
     inline fun <reified R, reified Q> QueryGateway.queryForOptional(queryName: String, query: Q): CompletableFuture<Optional<R>> {
         return this.query(queryName, query, ResponseTypes.optionalInstanceOf(R::class.java))
     }