Part 1: Modeling and Product Configuration

Extending the Home Contents Model

In this section we will expand our home contents model. The following figure shows the model as is.

contract model coverages
Figure 1. Home Contents Model with Base Coverage and Extra Coverage

Each HomeContract must include precisely one base coverage and any number of extra coverages. The base coverage always covers the sum insured according to the contract. In addition, a HomeContract can include optional extra coverages, typically covering risks like bicycle theft or overvoltage damage. We will cover these in the second part of our tutorial and focus on the HomeContract and HomeBaseCoverage for the time being.

Let us open the HomeContract class and define its attributes:

Name: Datatype Description, Comments

zipcode: String

The zipcode of the insured home contents

/ratingDistrict : String

The rating district (I, II, III, IV, or V) depends on the zipcode and determines the insurance rate.
→ Make sure to set the AttributeType to derived (computation on each call of the getter method)!

livingSpace : Integer

The living space of the insured home contents in square meters. Allowable values range from min=0 to unlimited. The value range is defined on the second dialog page. If you want the value range to be unlimited, leave the maximum field empty.

/proposedSumInsured : Money

A suggested value for the sum insured. It is determined based on the living space.
→ Make sure to set the AttributeType to derived (computation on each call of the getter method)!

sumInsured : Money

The sum insured.
Allowable values range from min=0 EUR and max=unlimited (empty field).

The editor showing the HomeContract class should now look as follows:

en115home contract class
Figure 2. The HomeContract Class

The derived attributes are prefixed with a slash according to the UML notation.

Next, open the HomeContract class in the Java Editor and implement the getter methods for the derived attributes "ratingDistrict" and "proposedSumInsured" as follows.

/**
 * Returns the ratingDistrict.
 *
 * @restrainedmodifiable
 */
@IpsAttribute(name = "ratingDistrict", kind = AttributeKind.DERIVED_ON_THE_FLY, valueSetKind = ValueSetKind.AllValues)
@IpsGenerated
public String getRatingDistrict() {
    // begin-user-code
    // TODO: later we'll implement this with a table lookup
    return "I";
    // end-user-code
}

/**
 * Returns the proposedSumInsured.
 *
 * @restrainedmodifiable
 */
@IpsAttribute(name = "proposedSumInsured", kind = AttributeKind.DERIVED_ON_THE_FLY, valueSetKind = ValueSetKind.AllValues)
@IpsGenerated
public Money getProposedSumInsured() {
    // begin-user-code
    // TODO: later we'll implement this with a product data lookup
    return Money.euro(650).multiply(livingSpace);
    // end-user-code
}

@restrainedmodifiable is generated by the generator instead of @generated for certain methods (e.g. in generated test classes or rules) and indicates that the developer can add their own code. The section in which the own code may appear is indicated by comments.@restrainedmodifiable can only be used if the annotation was created by the generator. A replacement of @generated and insertion of the appropriate comment lines does not work and is overwritten by the generator.