SQL>
SQL> set serveroutput on
SQL> CREATE OR REPLACE TYPE Point AS OBJECT (
2 x NUMBER,
3 y NUMBER,
4
5 MEMBER FUNCTION ToString RETURN VARCHAR2,
6 PRAGMA RESTRICT_REFERENCES(ToString, RNDS, WNDS, RNPS, WNPS),
7
8 MEMBER FUNCTION Distance(p IN Point DEFAULT Point(0,0))
9 RETURN NUMBER,
10 PRAGMA RESTRICT_REFERENCES(Distance, RNDS, WNDS, RNPS, WNPS),
11
12 MEMBER FUNCTION Plus(p IN Point) RETURN Point,
13 PRAGMA RESTRICT_REFERENCES(Plus, RNDS, WNDS, RNPS, WNPS),
14
15 MEMBER FUNCTION Times(n IN NUMBER) RETURN Point,
16 PRAGMA RESTRICT_REFERENCES(Times, RNDS, WNDS, RNPS, WNPS)
17 );
18 /
SQL>
SQL> CREATE OR REPLACE TYPE BODY Point AS
2 MEMBER FUNCTION ToString RETURN VARCHAR2 IS
3 myResult VARCHAR2(20);
4 v_xString VARCHAR2(8) := SUBSTR(TO_CHAR(x), 1, 8);
5 v_yString VARCHAR2(8) := SUBSTR(TO_CHAR(y), 1, 8);
6 BEGIN
7 myResult := '(' || v_xString || ', ';
8 myResult := myResult || v_yString || ')';
9 RETURN myResult;
10 END ToString;
11
12 MEMBER FUNCTION Distance(p IN Point DEFAULT Point(0,0))
13 RETURN NUMBER IS
14 BEGIN
15 RETURN SQRT(POWER(x - p.x, 2) + POWER(y - p.y, 2));
16 END Distance;
17
18 MEMBER FUNCTION Plus(p IN Point) RETURN Point IS
19 myResult Point;
20 BEGIN
21 myResult := Point(x + p.x, y + p.y);
22 RETURN myResult;
23 END Plus;
24
25 MEMBER FUNCTION Times(n IN NUMBER) RETURN Point IS
26 myResult Point;
27 BEGIN
28 myResult := Point(x * n, y * n);
29 RETURN myResult;
30 END Times;
31 END;
32 /
Type body created.
SQL> show errors
No errors.
SQL>
SQL>
SQL> DECLARE
2 v_P1 Point := Point(-1, 5);
3 v_P2 Point := Point(5, 2);
4 myResult Point;
5 BEGIN
6 DBMS_OUTPUT.PUT_LINE('p1: ' || v_P1.toString);
7 DBMS_OUTPUT.PUT_LINE('p2: ' || v_P2.toString);
8
9 DBMS_OUTPUT.PUT_LINE('Distance between p1 and p2 = ' || v_P1.Distance(v_P2));
10
11 DBMS_OUTPUT.PUT_LINE('Distance between p1 and the origin = ' ||
12 v_P1.Distance);
13
14 myResult := v_P1.Times(n => 2.5);
15 DBMS_OUTPUT.PUT_LINE('p1 * 2.5: ' || myResult.toString);
16 myResult := v_P1.Plus(p => v_P2);
17 DBMS_OUTPUT.PUT_LINE('p1 + p2: ' || myResult.toString);
18 END;
19 /
p1: (-1, 5)
p2: (5, 2)
Distance between p1 and p2 = 6.70820393249936908922752100619382870632
Distance between p1 and the origin = 5.09901951359278483002822410902278198956
p1 * 2.5: (-2.5, 12.5)
p1 + p2: (4, 7)
PL/SQL procedure successfully completed.
SQL>
SQL>