Extending an existing builder class

To extend an existing builder class, use the following syntax:

class MyExtendedBuilder extends SomeExistingBuilder {
  construct() {
    ...
  }
  ...
  function someNewFunction() : MyExtendedBuilder {
    ...
    return this
  }
  ...
}

The following MyPersonBuilder class extends the existing PersonBuilder class. The existing PersonBuilder class contains methods to set a home phone number and mobile phone number. The new extended class contains a method to set the person’s alternative phone number. As there is no static field for the properties on a type, you must look up the property by name. Note that you must first define the new property in the data model.

uses gw.api.databuilder.PersonBuilder
 
class MyPersonBuilder extends PersonBuilder {
 
  construct() {
    super( true )
  }
    
function withAltPhone( testname : String ) : MyPersonBuilder {
    set(Person#AltPhone, testname)
    return this
  }

 }

The PersonBuilder class has two constructors. This code sample uses the one that takes a Boolean that means create this class withDefaultOfficialID.

Another more slightly complex example would be if you extended the Person object and added a new PreferredName property. In this case, you might want to extend the PersonBuilder class also and add a withPreferredName method to populate that field through a builder.