EntityMinecartEmpty.java

package net.minecraft.entity.item;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.World;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.entity.minecart.MinecartInteractEvent;

public class EntityMinecartEmpty extends EntityMinecart
{
    public EntityMinecartEmpty(World par1World)
    {
        super(par1World);
    }

    public EntityMinecartEmpty(World par1, double par2, double par4, double par6)
    {
        super(par1, par2, par4, par6);
    }

    /**
     * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
     */
    public boolean interact(EntityPlayer par1EntityPlayer)
    {
        if(MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer))) 
        {
            return true;
        }
        if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != par1EntityPlayer)
        {
            return true;
        }
        else if (this.riddenByEntity != null && this.riddenByEntity != par1EntityPlayer)
        {
            return false;
        }
        else
        {
            if (!this.worldObj.isRemote)
            {
                par1EntityPlayer.mountEntity(this);
            }

            return true;
        }
    }

    public int getMinecartType()
    {
        return 0;
    }
}