Global Mapping examples

The global mapping permits to reduce the configuration in cases that the fields have the same name or all fields are mapped in direction to one.

1° Scenario

We have two beans with some variables that have the same names.

Annotation

@JGlobalMap(excluded={"other"})
class Destination {            class Source {

    String[] authors;              List<String> authors;  
    Date releaseDate;              Date releaseDate;
    String releaseVersion;         String releaseVersion;
    String other;                  String other;

    // getters and setters..       // getters and setters..
}                              }

XML

The XSD has not been added in order to improve readability, for more information see XSD wiki page.

<jmapper>
   <class name="package.Destination">
      <global>
          <excluded>
             <attribute name="other"/>
          </excluded>
      </global>
   </class>
</jmapper>

API

...
import static com.googlecode.jmapper.api.JMapperAPI.*;
...

new JMapperAPI()
   .add(mappedClass(Destination.class)
      .add(global()
             .excludedAttributes("other")));

example code

List<String> authors = new ArrayList<String>();
authors.add("Alessandro Vurro");
Source source = new Source(authors, new GregorianCalendar(2016, 3, 22).getTime(), "1.6.0", "other");

JMapper<Destination, Source> mapper = new JMapper<>(Destination.class, Source.class);
Destination destination = mapper.getDestination(source);

output:

Destination [authors=[Alessandro Vurro], releaseDate=Mon Mar 22 00:00:00 CET 2016, releaseVersion=1.2.0, other=null]

2° Scenario

We have one bean with some variables that point to a single field.

Annotation

class Destination {

    Double overallCost;

    public Destination(){
        overallCost = 0D;
    }

    public void setOverallCost(Double singleCost){
        this.overallCost += singleCost;
    }

    // getter..                                   
}

@JGlobalMap("overallCost")
class Source {
  
    Double costEmployees;
    Double costStructure;
    Double costAdvertising;

    // getters and setters..                                   
}

XML

<jmapper>
   <class name="package.Source">
      <global>
          <value name="overallCost"/>
      </global>
   </class>
</jmapper>

API

...
import static com.googlecode.jmapper.api.JMapperAPI.*;
...

new JMapperAPI()
   .add(mappedClass(Source.class)
      .add(global()
             .value("overallCost")));

example code

JMapper<Destination, Source> mapper = new JMapper<>(Destination.class, Source.class);
Destination destination = mapper.getDestination(new Source(154080.80D,24000D,12570.20D));

output:

Destination [overallCost=190651.0]