playerbean.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;

public abstract class PlayerBean implements EntityBean {

    private EntityContext context;

    // Access methods for persistent fields

    public abstract String getPlayerId();
    public abstract void setPlayerId(String id);
    
    public abstract String getName();
    public abstract void setName(String name);

    public abstract String getPosition();
    public abstract void setPosition(String position);

    public abstract double getSalary();
    public abstract void setSalary(double salary);

    // Access methods for relationship fields

    public abstract Collection getTeams();
    public abstract void setTeams(Collection teams);

    // Select methods

    public abstract Collection ejbSelectLeagues(LocalPlayer player)
        throws FinderException;

    public abstract Collection ejbSelectSports(LocalPlayer player)
        throws FinderException;

    // Business methods

    public Collection getLeagues() throws FinderException {

         LocalPlayer player = 
             (team.LocalPlayer)context.getEJBLocalObject();
         return ejbSelectLeagues(player);
    }

    public Collection getSports() throws FinderException {

         LocalPlayer player = 
             (team.LocalPlayer)context.getEJBLocalObject();
         return ejbSelectSports(player);
    }

    // EntityBean  methods

    public String ejbCreate (String id, String name, String position,
        double salary) throws CreateException {

        Debug.print("PlayerBean ejbCreate");
        setPlayerId(id);
        setName(name);
        setPosition(position);
        setSalary(salary);
        return null;
    }
         
    public void ejbPostCreate (String id, String name, String position,
        double salary) throws CreateException { }

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

} // PlayerBean class