classbean.java

精通Jboss——Ejb和Web Services开发精解的随书源代码

/*
 * Created on 2003-7-21
 */
package com.liuyang.ejb.cmp.Class;



import java.util.Collection;

import javax.ejb.CreateException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;

import com.liuyang.ejb.cmp.Classroom.ClassroomLocal;
import com.liuyang.ejb.cmp.Teacher.TeacherLocal;

/**
 * @author
 * <a href="mailto:[e-mail]">刘洋</a>
 */
public abstract class ClassBean implements EntityBean {
    
  protected EntityContext ctx;

  public abstract String getClassId();
  public abstract void setClassId(String classId);

  // relationship
  public abstract TeacherLocal getTeacher();
  public abstract void setTeacher(TeacherLocal teacher);

  public abstract Collection getStudents();
  public abstract void  setStudents(Collection students);

  public abstract ClassroomLocal getClassroom();
  public abstract void setClassroom(ClassroomLocal room);

  public String ejbCreate(String classId)
    throws CreateException {
    if (classId == null) {
      throw new CreateException("class id is null");
    }
    setClassId(classId);
    return null;
  }

  public void ejbPostCreate(String classId) {
  }

  public void setEntityContext(EntityContext ctx) {
    this.ctx = ctx;
  }
  public void unsetEntityContext() {
    ctx = null;
  }
  public void ejbActivate() {
  }
  public void ejbPassivate() {
  }
  public void ejbLoad() {
  }
  public void ejbStore() {
  }
  public void ejbRemove() {
  }

}