You can map a constructor call to any expression.

To map a constructor call to an expression using IRL mapping:

In this example, there is a class Customer in the XOM that contains an age attribute, and a constructor that takes the name of the customer as parameter:

// Execution class
public class Customer {
   public Customer(String name);
   public int age;
}

In the BOM, there is a different constructor that takes the name and the age of the customer:

public class Customer {
   public Customer(String name, int age);
}

The body of the constructor BOM to XOM mapping is expressed as:

Customer result = new Customer(name);
result.age = age;
return result;

Extender mapping can be used to map a constructor call to an expression.

To map a constructor call to an expression using extender mapping:

In this example, the method that is used when the constructor is called is provided as a Java static method called create.

public class ExtCustomer {  
  public static Customer create(String name, int age) {
    Customer c = new Customer(name);
    c.setAge(age);
    return c;
  }
}

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