Public class MyUserDataPopulator implements void populate(final UserModel source, final MyUserData target) throws ConversionException Import de.converter.ConversionException The populate method can be as simple as getting and setting values from the Model object (Source) to the target (DTO) or calling Services to get additional data. It implement the Populator interface and implement (override) the populate method. Private static final long serialVersionUID = 1L Public class MyUserData implements Serializable
It will contain only two properties like below.Īfter successful build (ant all), Below MyUserData class will generate by hybris in plateform/bootstrap/gensrc folder. So, we will define DTO class in -bean.xml file. Hybris out-of-box, UserModel have many properties but we have required only name and id out of all. After successful build, you can check your DTO(data transfer object) class at the specified package and DTO class contains your new property.įor Example: MyUserData (DTO), we will define our façade extensions in trainingfacades-beans.xml. you will define bean and properties in -beans.xml for create DTO class and build the hybris system. Hybris provide DTO generation via xml configuration. We will use converters and populators to create a target DTO by converting a source Model object using and Populators will populate data in DTO.ġ) Defining DTO (D ata T ransfer O bject) We will fetch our customer model from the database as source and we will convert source customer model to target Customer DTO data structure which is subset of the customer model and will be passed customer DTO to UI. For example, we have customer table(CustomerModel) in the database with 30 fields but we required only 10 field of them to return to Front end(UI) or other API. In applications, we need to create a subset of data from a larger data structure.
It means that Converters create new instances of Data objects and call Populators to populate these data objects. Using Converters, we will trying to create a target DTO by converting a source Model object and using Populators to populate the DTO. Data Transfer Objects (DTOs) are objects created to only contain values and have no business logic except for getter and setter methods
DTOs help to further decouple presentation from the service layer and the domain model. A DTO is helpful whenever you need to group values in ad hoc structures for passing data around. In the field of programming, we can describe DTO like " It is a object that used to encapsulate data, and transfer the data between classes and modules of your application ". Before start to converters and populators, We need to understand DTO (Data transfer object).
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