推土机映射字段类型= "one-way"未按预期工作

Question

根据Dozer文档，只有当"a"对象映射到"b"对象时，才会映射单向字段。如果"b"被映射到"a"，则该字段不会被映射。

但是对于下面的代码"b"仍然被映射到"a"。

 <mapping >
    <class-a>com.examples.source.Source</class-a>
    <class-b>com.examples.destination.Destination</class-b>
    <field type="one-way">
        <a set-method="setIRCCode" get-method="getIRCCode">ircCode</a>
        <b set-method="setIrcCode" get-method="getIrcCode">ircCode</b>
    </field> 
</mapping>
package com.examples.source;
public class Source {
    protected String ircCode;
    public String getIRCCode() {
        return ircCode;
    }
    public void setIRCCode(String value) {
        this.ircCode = value;
    }
}
package com.examples.destination;
public class Destination {
    private String ircCode;
    public String getIrcCode() {
        return this.ircCode;
    }
    public void setIrcCode(String ircCode) {
        this.ircCode = ircCode;
    }
}
public class Mapping {
    public static void main(String[] args) {
      DozerBeanMapper mapper = new DozerBeanMapper(Arrays.asList(new String[]{"Dozer-Mapping.xml"}));
      Destination destinationObj=new Destination();
      destinationObj.setIrcCode("B");
      Source srcObj= mapper.map(destinationObj, Source.class);
      System.out.println("Reverse Mapping IRCCode= "+ srcObj.getIRCCode());
   }
}

运行上述代码时输出：

Reverse Mapping IRCCode= B **(Unexpected and Wrong Result)**

预期结果是：

Reverse Mapping IRCCode= null

我使用的是Dozer 5.4.0版本。

Answer 1

我尝试了下面的代码，类似于你在Dozer的5.5.1中发布的帖子，它提供了null的预期结果。

代码：

public class A {
    private String aName;
    private String aPlace;
    /**
     * @return the aName
     */
    public String getaName() {
        return aName;
    }
    /**
     * @param aName the aName to set
     */
    public void setaName(String aName) {
        this.aName = aName;
    }
    /**
     * @return the aPlace
     */
    public String getaPlace() {
        return aPlace;
    }
    /**
     * @param aPlace the aPlace to set
     */
    public void setaPlace(String aPlace) {
        this.aPlace = aPlace;
    }
}
public class B {
    private String bName;
    private String bPlace;
    /**
     * @return the bName
     */
    public String getbName() {
        return bName;
    }
    /**
     * @param bName the bName to set
     */
    public void setbName(String bName) {
        this.bName = bName;
    }
    /**
     * @return the bPlace
     */
    public String getbPlace() {
        return bPlace;
    }
    /**
     * @param bPlace the bPlace to set
     */
    public void setbPlace(String bPlace) {
        this.bPlace = bPlace;
    }
}

推土机映射：

  <mapping> 
    <class-a>com.test.A</class-a>
    <class-b>com.test.B</class-b>   
    <field type="one-way">
      <a>aName</a>
      <b>bName</b>
    </field>
  </mapping>  

测试：

public static void main(String[] arg){
    List<String> myMappingFiles = new ArrayList<String>(1);
    myMappingFiles.add("dozer-mapping.xml");
    DozerBeanMapper mapper = new DozerBeanMapper();
    mapper.setMappingFiles(myMappingFiles);
    B obj=new B();
    obj.setbName("Test");
    A destObject = 
        mapper.map(obj, A.class);
              System.out.println("B="+destObject.getaName());
}

输出：

---

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
B=null