LuggageDropHandler.java

package openblocks.common;

import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import net.minecraft.entity.Entity;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.item.ItemStack;
import net.minecraftforge.event.entity.EntityJoinWorldEvent;
import net.minecraftforge.event.entity.item.ItemExpireEvent;
import openblocks.common.item.ItemLuggage;
import openmods.utils.EntityUtils;

public class LuggageDropHandler {

	private static boolean shouldPreventDespawn(EntityItem entity) {
		ItemStack stack = entity.getEntityItem();

		if (stack == null) return false;
		return stack.getItem() instanceof ItemLuggage && stack.hasTagCompound();
	}

	@SubscribeEvent
	public void onItemDrop(EntityJoinWorldEvent evt) {
		final Entity entity = evt.entity;
		if (entity instanceof EntityItem && shouldPreventDespawn((EntityItem)entity)) {
			EntityUtils.setEntityInvulnerable(entity, true);
		}
	}

	@SubscribeEvent
	public void onItemExpire(ItemExpireEvent evt) {
		if (shouldPreventDespawn(evt.entityItem)) {
			evt.extraLife += 0x12F58BF;
			evt.setCanceled(true);
		}
	}
}