wip: Modify CompositeEvent for generation

Author: gabizou

build.gradle.kts

@@ -137,6 +137,7 @@ tasks {
 
         outputFactory = "org.spongepowered.api.event.SpongeEventFactory"
         include("org/spongepowered/api/event/*/**/*")
+        include("org/spongepowered/api/event/CompositeEvent.java")
         exclude("org/spongepowered/api/event/action/InteractEvent.java")
         exclude("org/spongepowered/api/event/cause/")
         exclude("org/spongepowered/api/event/entity/AffectEntityEvent.java")

src/main/java/org/spongepowered/api/event/CompositeEvent.java

@@ -1,6 +1,11 @@
 package org.spongepowered.api.event;
 
+import org.spongepowered.api.event.impl.AbstractCompositeEvent;
+import org.spongepowered.api.event.impl.entity.AbstractDamageEntityEvent;
+import org.spongepowered.api.util.annotation.eventgen.GenerateFactoryMethod;
+import org.spongepowered.api.util.annotation.eventgen.ImplementedBy;
 import org.spongepowered.api.util.annotation.eventgen.NoFactoryMethod;
+import org.spongepowered.api.util.annotation.eventgen.PropertySettings;
 
 import java.util.List;
 import java.util.function.Consumer;
@@ -16,7 +21,8 @@
  * <p>Using {@link #setCancelled(boolean)} will perform a best effort cancellation
  * on each of the children events.
  */
-@NoFactoryMethod
+@GenerateFactoryMethod
+@ImplementedBy(AbstractCompositeEvent.class)
 public interface CompositeEvent<E extends Event> extends Event, Cancellable {
 
     E baseEvent();
@@ -46,6 +52,7 @@ default <E extends Event> void applyTo(Class<E> type, Consumer<? super E> consum
      *
      * @param cancel The new cancelled state
      */
+    @PropertySettings(generateMethods = false)
     @Override
     void setCancelled(boolean cancel);
 }

src/main/java/org/spongepowered/api/event/block/InteractBlockEvent.java

@@ -29,18 +29,14 @@
 import org.spongepowered.api.block.BlockTypes;
 import org.spongepowered.api.entity.living.player.Player;
 import org.spongepowered.api.event.Cancellable;
-import org.spongepowered.api.event.CompositeEvent;
 import org.spongepowered.api.event.action.InteractEvent;
-import org.spongepowered.api.event.entity.SpawnEntityEvent;
-import org.spongepowered.api.event.item.inventory.ChangeInventoryEvent;
 import org.spongepowered.api.item.inventory.ItemStack;
 import org.spongepowered.api.util.Direction;
 import org.spongepowered.api.util.Tristate;
+import org.spongepowered.api.util.annotation.eventgen.GenerateFactoryMethod;
 import org.spongepowered.api.world.server.ServerLocation;
 import org.spongepowered.math.vector.Vector3d;
 
-import java.util.Optional;
-
 /**
  * Base event for all interactions involving a {@link BlockSnapshot} at a
  * {@link ServerLocation}.
@@ -106,6 +102,7 @@ interface Finish extends Primary, Cancellable {
      *
      * <p>This is usually right-click.</p>
      */
+    @GenerateFactoryMethod
     interface Secondary extends InteractBlockEvent {
 
         Tristate originalUseItemResult();

src/main/java/org/spongepowered/api/event/impl/AbstractCompositeEvent.java

@@ -0,0 +1,32 @@
+package org.spongepowered.api.event.impl;
+
+import org.spongepowered.api.event.Cancellable;
+import org.spongepowered.api.event.CompositeEvent;
+import org.spongepowered.api.event.Event;
+import org.spongepowered.api.util.annotation.eventgen.UseField;
+
+import java.util.Collections;
+import java.util.List;
+
+public abstract class AbstractCompositeEvent<E extends Event> extends AbstractEvent implements CompositeEvent<E> {
+
+    @UseField(overrideToString = true)
+    protected List<Event> children;
+
+    @UseField
+    protected boolean cancelled;
+
+    public final void postInit() {
+        this.children = Collections.unmodifiableList(this.children);
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+        this.children().forEach(event -> {
+            if (event instanceof Cancellable cancellable) {
+                cancellable.setCancelled(cancel);
+            }
+        });
+    }
+}