如何使用Dozer实例化子类?

时间:2014-01-28 23:12:10

标签: java dozer

我有以下目标类:

public class Person {
    private String firstName;
    private String lastName;
    ...
}

public class Employee extends Person {
    private String postion;
    ...
}

public class PersonContainer {
   private Person person;
   ...
}

这是我的来源:

public class Form {
    private String firstNameEmployee;
    private String lastNameEmployee;
    private String positionEmployee;
    ...
}


目标

我想获取对象 PersonContainer ,但不能使用 Person 对象,而是使用 Employee 对象。我真的不知道如何实现这一目标。如何告诉Dozer实例化一个子类?

此映射提供 Person 对象:

 <mapping>
    <class-a>hl.test.dozer03.form.Form</class-a>
    <class-b>hl.test.dozer03.result.PersonContainer</class-b>


    <field>
        <a>firstNameEmployee</a>
        <b>person.firstName</b>
    </field>

    <field>
        <a>lastNameEmployee</a>
        <b>person.lastName</b>
    </field>

 </mapping>


可以通过稍微修改此映射来完成吗?

2 个答案:

答案 0 :(得分:1)

您需要使用custom-createMethod。 http://dozer.sourceforge.net/documentation/customCreateMethod.html

这样的事情:

<mapping>
  <class-a>hl.test.dozer03.form.Form</class-a>
  <class-b create- method="PersonContainerFactory.createPersonContainer">hl.test.dozer03.result.PersonContainer</class-b>


  <field>
    <a>firstNameEmployee</a>
    <b>person.firstName</b>
  </field>

  <field>
    <a>lastNameEmployee</a>
    <b>person.lastName</b>
  </field>

</mapping>

使用java类:

public class PersonContainerFactory {

  public static PersonContainer createPersonContainer(){
      PersonContainer cont = new PersonContainer();
      cont.setPerson(new Employee());
      return classA;
  }
}

答案 1 :(得分:0)

尝试将Person类字段更改为protected,以便可以继承它们

public class Person {
    protected String firstName;
    protected String lastName;
    ...
}

从PersonContainer更改为(你想要的是什么)

public class EmployeeContainer {
   private Employee employee;
   ...
}

希望有所帮助