Allow to check spawner block entity in events (#7941)

src/test/java/net/minecraftforge/debug/entity/CheckSpawnEventTest.java

@@ -0,0 +1,42 @@
+package net.minecraftforge.debug.entity;
+
+import net.minecraft.world.entity.vehicle.MinecartSpawner;
+import net.minecraft.world.level.block.entity.SpawnerBlockEntity;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.event.entity.living.LivingSpawnEvent;
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
+import net.minecraftforge.fml.common.Mod;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Mod("check_spawn_event_test")
+public class CheckSpawnEventTest
+{
+    public static final boolean ENABLE = true;
+    public static final Logger LOGGER = LogManager.getLogger();
+
+    public CheckSpawnEventTest()
+    {
+        if (ENABLE)
+            MinecraftForge.EVENT_BUS.register(this);
+    }
+
+    @SubscribeEvent
+    public void checkSpawn(LivingSpawnEvent.CheckSpawn event)
+    {
+        if (event.isSpawner())
+        {
+            if (event.getSpawner().getSpawnerBlockEntity() instanceof SpawnerBlockEntity)
+            {
+                LOGGER.info("Stopped {} from spawning from Spawner Block Entity : {}", event.getEntity(), event.getSpawner().getSpawnerBlockEntity());
+                event.setResult(Event.Result.DENY);
+            }
+            if (event.getSpawner().getSpawnerEntity() instanceof MinecartSpawner)
+            {
+                LOGGER.info("Stopped {} from spawning from Minecart Spawner : {}", event.getEntity(), event.getSpawner().getSpawnerEntity());
+                event.setResult(Event.Result.DENY);
+            }
+        }
+    }
+}