package com.kuaff.ejb3.composite;

import java.io.Serializable;

import javax.ejb.AccessType;

import javax.ejb.DependentObject;

@DependentObject(access = AccessType.PROPERTY)

public class Name implements java.io.Serializable

{

   private String first;

   private String last;

   public Name()

   {

   }

   public Name(String first, String last)

   {

      this.first = first;

      this.last = last;

   }

   public String getFirst()

   {

      return first;

   }

   public void setFirst(String first)

   {

      this.first = first;

   }

   public String getLast()

   {

      return last;

   }

   public void setLast(String last)

   {

      this.last = last;

   }

   public int hashCode()

   {

      return (first+last).hashCode();

   }

   public boolean equals(Object object)

   {

       if (this == object) return true;

       if (object == null) return false;

       if (! (object instanceof Name)) return false;

       Name name = (Name)object;

       if ((name.first.equals(first)) && (name.last.equals(last)))

       return true;

       else

           return false;

   }

}

package com.kuaff.ejb3.composite;

import javax.ejb.Dependent;

import javax.ejb.DependentAttribute;

import javax.ejb.Column;

import javax.ejb.Entity;

import javax.ejb.GeneratorType;

import javax.ejb.Id;

import javax.ejb.Table;

@Entity @Table(name = "STUDENT") public class Student implements java.io.Serializable

{

    private Name name;

    private String grade;

    private String email;

    public void setName(Name name)

    {

        this.name = name;

    }

    @Id(generate = GeneratorType.NONE)

    @Dependent(

    { @DependentAttribute(name = "first", column ={ @Column(name = "FIRST") }),

      @DependentAttribute(name = "last", column ={ @Column(name = "LAST") }) })

    public Name getName()

    {

        return name;

    }

    public void setGrade(String grade)

    {

        this.grade = grade;

    }

    @Column(name = "GRADE")

    public String getGrade()

    {

        return grade;

    }

    public void setEmail(String email)

    {

        this.email = email;

    }

    @Column(name = "EMAIL")

    public String getEmail()

    {

        return email;

    }

}

package com.kuaff.ejb3.composite;

import javax.ejb.Remote;

import java.util.List;

@Remote

public interface StudentDAO

{

    void create(String first, String last, String grade, String email);

    Student find(Name name);

    List findByFirstName(String name);

    List findByLastName(String name);

    List findByEmail(String email);

    void merge(Student s);

}

package com.kuaff.ejb3.composite;

import java.util.List;

import javax.ejb.EntityManager;

import javax.ejb.Inject;

import javax.ejb.Stateless;

@Stateless

public class StudentDAOBean implements StudentDAO

{

    @Inject

    private EntityManager manager;

    public void create(String first, String last, String grade, String email)

    {

        Student student = new Student();

        student.setName(new Name(first,last));

        student.setGrade(grade);

        student.setEmail(email);

        manager.create(student);

    }

    public Student find(Name name)

    {

        return manager.find(Student.class, name);

    }

    public List findByFirstName(String name)

    {

        return manager.createQuery("from Student s where s.name.last = :name").setParameter("name", name).listResults();

    }

    public List findByLastName(String name)

    {

        return manager.createQuery("from Student s where s.name.first = :name").setParameter("name", name).listResults();

    }

    public List findByEmail(String email)

    {

        return manager.createQuery("from Student s where s.email = :email").setParameter("email", email).listResults();

    }

    public void merge(Student s)

    {

        manager.merge(s);

    }

}

package com.kuaff.ejb3.composite;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import java.util.List;

public class Client

{

    public static void main(String[] args) throws NamingException

    {

        InitialContext ctx = new InitialContext();

        StudentDAO dao = (StudentDAO) ctx.lookup(StudentDAO.class.getName());

        dao.create("晁","岳攀","8","[email protected]");

        dao.create("朱","立焕","6","[email protected]");

        Name name = new Name("朱","立焕");

        //List list = dao.findByEmail("[email protected]");

        Student s = dao.find(name);

        System.out.printf("%s %s的email:%s%n",s.getName().getFirst(),s.getName().getLast(),s.getEmail());

        /*

        for(Object o:list)

        {

            Student s = (Student)o;

            System.out.printf("%s %s的email:%s%n",s.getName().getFirst(),s.getName().getLast(),s.getEmail());

        }

        */

    }

}