Teamcenter SOA开发中关于变量声明，转换等代码的新处理方式

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Teamcenter SOA开发中关于变量声明，转换等代码的新处理方式


1 变量声明
6 ]4 J- L% G# |# }6 C3 a* s

o Old way
// Declare pointers for an Item, Form and vector of ModelObjects
2 M& w1 b: J' N4 h7 r1 [# z// initialize to NULL
Item *theItem = NULL;
" @2 h2 ^" Z2 h! @4 o) b/ IForm *theForm = NULL;
vector< ModelObject *> objects;
% m1 d( @: h, s1 \4 G7 y...
5 n+ N3 b/ }; H- n3 R6 Y// Use the Item
7 O- H8 f" }# w' q9 y2 ntheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
; r( F$ [2 |7 B9 Z+ S7 S: Q// all AutoPtrs are instantiated as NULL
. d: d: D) @7 |: |! Y$ ]1 Z* PTeamcenter::Soa::Common::AutoPtr<Item> theItem;
; ~2 S& p2 v4 wTeamcenter::Soa::Common::AutoPtr<Form> theForm;
4 E9 ~5 [5 Q% vvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
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2 类型转换

% g0 H- m( C" m* j$ K! n+ N$ M/ Wo Old way
// Declare the variables
User *user;
ModelObject *anObj;
0 j/ f$ m7 ?* N) z& ]Folder *folder;
' r1 U2 i' I2 r: Vuser = sessionService->login(name,pass, “”,””, descrim ).user;
; K" V( |5 X# M4 k3 E& u// Cast to the base ModelObject class
anObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
2 ^2 Q) ~( I1 y, F' R1 Y* Ruser = dynamic_cast<User*>(anObj);
, v! J" R5 E# k% ^, iif(user != NULL)
% H0 I/ l/ U3 W2 n( C- z9 ~- m2 Y{
folder = user->get_home_folder();
3 l$ E5 k# h- }}
o New way
// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
- U6 U3 W$ F( g9 X6 t* UTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
; ]5 ?' s4 K$ VTeamcenter::Soa::Common::AutoPtr<Folder> folder;
! i7 a8 G' ^; Y1 A& Vuser = sessionService->login(name,pass, “”,””, descrim ).user;
$ M( P1 R4 ^1 w& ^$ p// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
// Put the cast to a speicfic sub-type, in a try/caTCh block
! P3 {8 V" N! j; o9 G1 U2 P// if std::bad_cast not thrown, then cast was successful
try
{
user = anObj.dyn_cast< User >();
0 S8 r7 a; ]* j; _folder = user->get_home_folder();
  w) K0 m: j) s# o% r+ p}
catch(std::bad_cast&){}

; _+ Y. q& M9 [+ w, I# u% H
$ T( ?" W2 Y- x3 关于NULL 赋值

& F% Z9 l& C$ J. Uo Old way
+ G$ A( `# m6 z2 E// Declare the variables
LoginResponse response;
User * user;
* a- y( C3 J5 t2 w% E1 _: y- u2 `// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
* E- D! e8 W% K4 _3 s' _// Test that instnace against NULL
6 D$ ?# Y: J, I* fif( user == NULL)
5 O& ]; `! ^* X2 X" L( t7 x; J{
...
3 N5 J% B$ f' v/ S4 w}
else
/ ?- S: M2 U( Y' L" k5 n{
// Assign NULL to the pointer
8 }7 \. a$ P, k. |7 @user = NULL;
}
o New way
// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
' o7 L. m: S6 ?6 f) h" pLoginResponse response;
Teamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
response = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
// AutoPtr template class.
8 O) o& \+ Q+ D- V: r3 _  r' N2 vif( user.isNull())
{
: d4 e& W! f0 r" S/ f8 E...
}
else
; R; l0 w& B/ {6 s  y{
- m$ F; ^0 d8 Q. Z// Release the instance and
+ v6 k( m2 I! Z* g: S) @) g- X0 \7 Uuser.release();
}
* i( `+ L8 {6 {! X