teambean.java

卡内基梅隆大学软件工程课件,很全面

/*
 *
 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 *
 */

package team;

import java.util.*;
import javax.ejb.*;
import javax.naming.*;
import util.Debug;
import util.PlayerDetails;

public abstract class TeamBean implements EntityBean {

    private EntityContext context;

    // Access methods for persistent fields

    public abstract String getTeamId();
    public abstract void setTeamId(String id);
    
    public abstract String getName();
    public abstract void setName(String name);

    public abstract String getCity();
    public abstract void setCity(String city);


    // Access methods for relationship fields

    public abstract Collection getPlayers();
    public abstract void setPlayers(Collection players);

    public abstract LocalLeague getLeague();
    public abstract void setLeague(LocalLeague league);

    // Business methods

    public ArrayList getCopyOfPlayers() {

        Debug.print("TeamBean getCopyOfPlayers");
        ArrayList playerList = new ArrayList();
        Collection players = getPlayers();

        Iterator i = players.iterator();
        while (i.hasNext()) {
            LocalPlayer player = (LocalPlayer) i.next();
            PlayerDetails details = new PlayerDetails(player.getPlayerId(),
                player.getName(), player.getPosition(), 0.00);
            playerList.add(details);
        }

        return playerList;
    }

    public void addPlayer(LocalPlayer player) {

        Debug.print("TeamBean addPlayer");
        try {
            Collection players = getPlayers();
            players.add(player);
        } catch (Exception ex) {
            throw new EJBException(ex.getMessage());
        }
    }

    public void dropPlayer(LocalPlayer player) {

        Debug.print("TeamBean dropPlayer");
        try {
            Collection players = getPlayers();
            players.remove(player);
        } catch (Exception ex) {
            throw new EJBException(ex.getMessage());
        }
    }

    // EntityBean  methods

    public String ejbCreate (String id, String name, String city)
        throws CreateException {

        Debug.print("TeamBean ejbCreate");
        setTeamId(id);
        setName(name);
        setCity(city);
        return null;
    }
         
    public void ejbPostCreate (String id, String name, String city)
        throws CreateException { }

    public void setEntityContext(EntityContext ctx) {
        context = ctx;
    }
    
    public void unsetEntityContext() {
        context = null;
    }
    
    public void ejbRemove() {
        Debug.print("TeamBean ejbRemove");
    }
    
    public void ejbLoad() {
        Debug.print("TeamBean ejbLoad");
    }
    
    public void ejbStore() {
        Debug.print("TeamBean ejbStore");
    }
    
    public void ejbPassivate() { }
    public void ejbActivate() { }


} // TeamBean class