Very short introduction to jTranso, an open source project which handles conversion between transfer and domain objects.

1. Convert transfer ↔ domain objects
● Easy to use
● No dependencies
● Annotation based
● Many transfer objects – one domain object
● Integration
● Spring Framework
● Joda-time

2. Easy conversion
JTransfo jTransfo = new JTransfoImpl();
SomeDomainClass domainObject = (SomeDomainClass)
jTransfo.convert(transferObject);
Or
SomeDomainClass domainObject = new
SomeDomainClass();
jTransfo.convert(transferObject, domainObject);
Or
jTransfo.convertTo(transferObject,
SomeDomainClass.class);

3. Annotations on transfer object
@Data
@DomainClass("pkg.Person")
public class PersonTo {
private String name;
@MappedBy(field = “country”, path = “addr”)
private String addrCountry;
@MappedBy(readOnly = true)
private String gender;
@NotMapped
private String globaalNummer;
}

4. Type conversion, lists
@MappedBy(typeConverter = "filterToList")
private List<FilterTo> filters;
@MappedBy(typeConverter = "readOnlyDomain")
private LayerTo layer;

5. Type conversion, spring
<import resource=
"classpath:org/jtransfo/spring/jTransfoContext.xml" />
<bean
class="org.jtransfo.ReadOnlyDomainTypeConverter" />
<bean
class="org.jtransfo.ReadOnlyDomainListTypeConverter"
>
<constructor­arg value="filterToList" />
<constructor­arg value="pkg.FilterTo" />
<property name="sortList" value="true" />
</bean>

6. ORM link, Object finder
● Automatically build new / linked object
● Find in Hibernate maybe
● Always consistent
● Use ReadOnlyDomain to either update links
only or linked object contents as well

7. www.jtransfo.org
https://github.com/joachimvda/jtransfo
@joachimvda