import IE.Iona.Orbix2.CORBA.SystemException;
import IE.Iona.Orbix2._CORBA;
import java.util.Vector;

/**
 * @author Martin Andrews@
 * @version 4.0 August 12th, 1997@
 */
public class AccountImp implements _AccountOperations
{
    private String id;      // ID number of the account
    private Vector refs;    // list of object referencing this Account

    /**
     * Constructor for the Account class
     *
     * @param anId@
     * @param aRef@
     */
    public AccountImp(String anId, _CheckableRef aRef)
    {
        id = anId;
        refs = new Vector(1, 1);
        refs.addElement(aRef);
    }

    /**
     * Returns the id of the Account
     *
     * @return Account ID number@
     */
    public String getId()
    {
        return id;
    }

    /**
     * Checks all referencing objects to see if they are still alive.  Any
     * one still being alive will result in a true return value.
     *
     * @return true if an object is referencing this Account, otherwise false@
     */
    public boolean gcCheck()
    {
        int count = 0;
        boolean check = false;
        do
        {
            try
            {
                check = ((_CheckableRef)refs.elementAt(count)).stillLive();
            }
            catch (SystemException se)
            {
                check = false;      // assume object dead if it can't be reached
            }
        }
        while (count < refs.size() && !check);
        return check;
    }

    /**
     * Adds an object to the list of objects already referencing this Account
     *
     * @param aRef@
     * @return true if aRef was added successfully, otherwise false@
     */
    public boolean attach(_CheckableRef aRef)
    {
        refs.addElement(aRef);
        return true;
    }

    /**
     * Removes an object from the list of objects referencing this Account
     *
     * @param aRef@
     * @return true if aRef was removed successfully, otherwise false@
     */
    public boolean detach(_CheckableRef aRef)
    {
        return (refs.removeElement(aRef));
    }

    /**
     * Displays a string upon finalization of the Account (just before garbage collection)
     */
    protected void finalize()
    {
        System.out.println("*********************************************");
        System.out.println("***          Finalizing Account           ***");
        System.out.println("*********************************************");
    }
}