import java.lang.reflect.Field;
import java.util.Map;

import net.minecraft.server.v1_9_R1.Entity;
import net.minecraft.server.v1_9_R1.EntityTNTPrimed;

public enum EntityTypes
{
    CUSTOM_TNT("PrimedTnt", 20, TNTPrimed_1_7.class);
	private String n;
	private int i;
	private Class<?> c;
    private EntityTypes(String name, int id, Class<? extends Entity> custom)
    {
    	this.n = name;
    	this.i = id;
    	this.c = custom;
    }
    public static void register(EntityTypes en){
        addToMaps(en.c, en.n, en.i);
    }
	@SuppressWarnings({ "unchecked", "rawtypes" })
	private static void addToMaps(Class<?> clazz, String name, int id)
    {
        //getPrivateField is the method from above.
        //Remove the lines with // in front of them if you want to override default entities (You'd have to remove the default entity from the map first though).
        ((Map)getPrivateField("c", net.minecraft.server.v1_9_R1.EntityTypes.class, null)).put(name, clazz);
        ((Map)getPrivateField("d", net.minecraft.server.v1_9_R1.EntityTypes.class, null)).put(clazz, name);
        ((Map)getPrivateField("e", net.minecraft.server.v1_9_R1.EntityTypes.class, null)).put(Integer.valueOf(id), clazz);
        ((Map)getPrivateField("f", net.minecraft.server.v1_9_R1.EntityTypes.class, null)).put(clazz, Integer.valueOf(id));
        ((Map)getPrivateField("g", net.minecraft.server.v1_9_R1.EntityTypes.class, null)).put(name, Integer.valueOf(id));
    }
    private static Object getPrivateField(String fieldName, Class<?> clazz, Object object)
    {
        Field field;
        Object o = null;
        try
        {
            field = clazz.getDeclaredField(fieldName);
            field.setAccessible(true);
            o = field.get(object);
        }
        catch(NoSuchFieldException e)
        {
            e.printStackTrace();
        }
        catch(IllegalAccessException e)
        {
            e.printStackTrace();
        }
        return o;
    }
}