abap-llm/tasks_gen/train/G1951/spec.md

1. Goal

A property management company checks a tenancy application before it offers a flat to an applicant. The office calls the check for each application. The office also needs the deposit that the applicant must pay.

2. Open questions

None.

3. Context

• The office works with one interface and one class that implements the interface.
• The interface {{P}}IF_TENANCY_CHECK holds the types, the constants and the method signatures of the tenancy check.
• The class {{P}}TENANCY_CHECKER holds the logic.
• The method CHECK returns one reason code for each tenancy application.
• The method DEPOSIT returns the deposit of a tenancy application.

4. Contract

Create the interface {{P}}IF_TENANCY_CHECK in package $TMP. The interface is public. It has these components and no other components.

Types:

• TY_REASON: type c, length 10.
• TY_EMPLOYMENT: type c, length 1.
• TY_AMOUNT: type p, length 8, 2 decimal places.

Constants:

• C_EMPLOYMENT: a constant structure with the components PERMANENT, FIXED and SELF. Each component has the type TY_EMPLOYMENT. The values are: PERMANENT = 'P', FIXED = 'F', SELF = 'S'.
• C_REASON: a constant structure with the components OK, RENT, INCOME, PERSONS, CAPACITY, EMPLOYMENT and RATIO. Each component has the type TY_REASON. The values are: OK = 'OK', RENT = 'RENT', INCOME = 'INCOME', PERSONS = 'PERSONS', CAPACITY = 'CAPACITY', EMPLOYMENT = 'EMPLOYMENT', RATIO = 'RATIO'.

Methods:

• CHECK IMPORTING iv_rent TYPE ty_amount iv_income TYPE ty_amount iv_rooms TYPE i iv_persons TYPE i iv_employment TYPE ty_employment iv_pets TYPE abap_bool RETURNING VALUE(rv_reason) TYPE ty_reason.
• DEPOSIT IMPORTING iv_rent TYPE ty_amount iv_pets TYPE abap_bool RETURNING VALUE(rv_deposit) TYPE ty_amount.

Create the class {{P}}TENANCY_CHECKER in package $TMP.

• The class is public, final, and has a public constructor without parameters.
• The class implements {{P}}IF_TENANCY_CHECK.
• Do not add other public methods.

5. Business rules

The method CHECK applies the rules in this sequence. It returns the reason of the first rule that fails.

1. If iv_rent is less than or equal to zero, return RENT.
2. If iv_income is less than or equal to zero, return INCOME.
3. If iv_persons is less than one, return PERSONS.
4. If iv_persons is greater than two times iv_rooms, return CAPACITY.
5. If iv_employment is not 'P', 'F' or 'S', return EMPLOYMENT.
6. The income factor is 3 for 'P', 4 for 'F' and 5 for 'S'. If iv_pets is true, add 1 to the income factor. If iv_income is less than iv_rent multiplied by the income factor, return RATIO.
7. Return OK.

The method DEPOSIT applies the rules in this sequence.

1. If iv_rent is less than or equal to zero, return 0.
2. If iv_pets is true, return three times iv_rent.
3. Return two times iv_rent.

6. Constraints

• Release target: SAP_BASIS 816 (ABAP Platform 2025).
• Coding standards: Clean ABAP. Method length below 40 statements. No global variables. No comment that restates the code.
• Out of scope: do not create database tables, CDS views, reports or function modules.

7. Acceptance

• The interface and the class are active and have no syntax error.
• The hidden tests pass.
• Write your own ABAP Unit tests for the class.