spawner

package me.rabrg.mobspawner;

import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.craftbukkit.v1_7_R1.block.CraftCreatureSpawner;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityExplodeEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

public final class Plugin extends JavaPlugin implements Listener {

    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
    }

    @SuppressWarnings("deprecation")
    @EventHandler(priority = EventPriority.MONITOR)
    public void onEntityExplodeEvent(final EntityExplodeEvent event) {
        if (event.getEntityType() == EntityType.PRIMED_TNT) {
            for (final Block block : event.blockList()) {
                if (block.getType() == Material.MOB_SPAWNER) {
                    for(final Entity entity: event.getEntity().getNearbyEntities(50, 50, 50)) {
                        if (entity instanceof Player) {
                            if (((Player) entity).hasPermission("silkspawners.silkdrop.*")) {
                                block.getWorld().dropItemNaturally(block.getLocation(), new ItemStack(Material.MOB_SPAWNER, 1, (short) ((CraftCreatureSpawner) block.getState()).getSpawnedType().getTypeId()));
                            }
                        }
                    }
                }
            }
        }
    }

}