Implement custom bukkit's entity for modded projectiles

Fix #150

patches/net/minecraft/util/EntityDamageSourceIndirect.java.patch

@@ -1,6 +1,17 @@
 --- ../src-base/minecraft/net/minecraft/util/EntityDamageSourceIndirect.java
 +++ ../src-work/minecraft/net/minecraft/util/EntityDamageSourceIndirect.java
-@@ -33,4 +33,11 @@
+@@ -13,6 +13,10 @@
+     {
+         super(p_i1568_1_, p_i1568_2_);
+         this.indirectEntity = p_i1568_3_;
++        // KCauldron start - pass projectlie source
++        if (damageSourceEntity != null && damageSourceEntity.getBukkitEntity() instanceof org.bukkit.entity.Projectile && indirectEntity.getBukkitEntity() instanceof org.bukkit.projectiles.ProjectileSource)
++            ((org.bukkit.entity.Projectile) damageSourceEntity.getBukkitEntity()).setShooter((org.bukkit.projectiles.ProjectileSource) indirectEntity.getBukkitEntity());
++        // KCauldron end
+     }
+ 
+     public Entity getSourceOfDamage()
+@@ -33,4 +37,11 @@
          String s1 = s + ".item";
          return itemstack != null && itemstack.hasDisplayName() && StatCollector.canTranslate(s1) ? new ChatComponentTranslation(s1, new Object[] {p_151519_1_.func_145748_c_(), ichatcomponent, itemstack.func_151000_E()}): new ChatComponentTranslation(s, new Object[] {p_151519_1_.func_145748_c_(), ichatcomponent});
      }

src/main/java/kcauldron/entity/CustomProjectileEntity.java

@@ -0,0 +1,48 @@
+package kcauldron.entity;
+
+import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Projectile;
+import org.bukkit.projectiles.ProjectileSource;
+
+import net.minecraft.entity.Entity;
+import net.minecraftforge.cauldron.entity.CraftCustomEntity;
+
+public class CustomProjectileEntity extends CraftCustomEntity implements Projectile {
+    private ProjectileSource shooter;
+    private boolean doesBounce;
+
+    public CustomProjectileEntity(CraftServer server, Entity entity) {
+        super(server, entity);
+    }
+
+    @Override
+    public LivingEntity _INVALID_getShooter() {
+        throw new IllegalStateException("Not implemented!");
+    }
+
+    @Override
+    public ProjectileSource getShooter() {
+        return shooter;
+    }
+
+    @Override
+    public void _INVALID_setShooter(LivingEntity shooter) {
+        throw new IllegalStateException("Not implemented!");
+    }
+
+    @Override
+    public void setShooter(ProjectileSource shooter) {
+        this.shooter = shooter;
+    }
+
+    @Override
+    public boolean doesBounce() {
+        return doesBounce;
+    }
+
+    @Override
+    public void setBounce(boolean doesBounce) {
+        this.doesBounce = doesBounce;
+    }
+}

src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java

@@ -172,7 +172,9 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         else if (entity instanceof net.minecraft.entity.item.EntityTNTPrimed) { return new CraftTNTPrimed(server, (net.minecraft.entity.item.EntityTNTPrimed) entity); }
         else if (entity instanceof net.minecraft.entity.item.EntityFireworkRocket) { return new CraftFirework(server, (net.minecraft.entity.item.EntityFireworkRocket) entity); }
         // Cauldron - used for custom entities that extend Entity directly
-        else if (entity instanceof net.minecraft.entity.Entity) { return new CraftCustomEntity(server, (net.minecraft.entity.Entity) entity); }
+        else if (entity instanceof net.minecraft.entity.Entity) {
+            if (entity instanceof net.minecraft.entity.IProjectile) return new kcauldron.entity.CustomProjectileEntity(server, entity); // KCauldron
+            return new CraftCustomEntity(server, (net.minecraft.entity.Entity) entity); }
 
         throw new AssertionError("Unknown entity " + entity == null ? null : entity.getClass() + ": " + entity); // Cauldron - show the entity that caused exception
     }