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
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0 i  `% ?/ O3 X6 {% }8 jo Old way
// Declare pointers for an Item, Form and vector of ModelObjects
// initialize to NULL
5 m# M" f. p1 m* i  w. oItem *theItem = NULL;
5 l% v. X- }6 k. C/ HForm *theForm = NULL;
% L; B6 O6 {7 W3 j6 h- i1 Xvector< ModelObject *> objects;
...
7 J. w8 J& ]" ?) Z0 i' q! K) {// Use the Item
theForm = theItem->get_item_master_tag();
4 j0 E: f+ m0 D! ?objects = theItem->get_revision_list();
o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
. B% _$ a# c4 N: ~% \// all AutoPtrs are instantiated as NULL
: u9 k2 w6 B0 d- ~Teamcenter::Soa::Common::AutoPtr<Item> theItem;
+ F! T8 d/ e" v/ O2 F) UTeamcenter::Soa::Common::AutoPtr<Form> theForm;
" s. y- L$ B: s2 M8 d8 {vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
+ Z7 K' q0 e, J( K* Q6 k// Use of the ModelObject variables remains unchanged
theForm = theItem->get_item_master_tag();
9 n1 k0 o1 W# ^- ~6 Pobjects = theItem->get_revision_list();
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2 类型转换

o Old way
! p& e( r( n& v1 e+ l# j// Declare the variables
% n3 l# v# q! C4 F5 b8 YUser *user;
ModelObject *anObj;
0 g: i/ {' `( w0 @2 l& ZFolder *folder;
# F. V* K6 m$ G3 Cuser = sessionService->login(name,pass, “”,””, descrim ).user;
; T& F' c' G# o2 K// Cast to the base ModelObject class
anObj = (ModelObject*)user;
/ i$ M1 z0 L8 R// Cast to a speicfic sub-type, if not NULL
! h! }& ~# c( d" x: p0 M; _6 m( H// do something with the new pointer
/ }6 l1 C: E0 r* A+ U  |+ [4 L9 _user = dynamic_cast<User*>(anObj);
5 m( k0 e2 U1 I* ~1 A, ?1 Hif(user != NULL)
{
folder = user->get_home_folder();
}
o New way
. h- O' }0 ~* z// Declare the variables
3 t: j# }# d+ r' T% D2 o* `/ rTeamcenter::Soa::Common::AutoPtr<User> user;
6 B. H: y6 W8 u4 F/ Z, d$ n9 A) T8 iTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
0 H. `5 F0 H8 i9 |4 l) Juser = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
8 w4 f& y. J$ W+ D. v# xanObj = user.cast<ModelObject>();
// Put the cast to a speicfic sub-type, in a try/caTCh block
/ o! U' p' v* t% O// if std::bad_cast not thrown, then cast was successful
try
{
user = anObj.dyn_cast< User >();
& D3 |3 g# O# y' d+ I( D# yfolder = user->get_home_folder();
8 x  }4 ]/ I* p3 Z% t2 [}
catch(std::bad_cast&){}
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6 L9 Z2 O  j% }3 关于NULL 赋值

o Old way
+ H* b% M3 o& V7 P// Declare the variables
LoginResponse response;
% E" e' i/ W' o5 i% C  Y& aUser * user;
// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
2 q# d- R% q, R  C  S' h0 s" Ruser = response.user;
// Test that instnace against NULL
, V; {7 l% R5 Y; B, mif( user == NULL)
{
; Z& K# [. f3 t, D1 W...
}
else
" i+ O! ^7 a4 b{
// Assign NULL to the pointer
) o8 r1 _- W9 L- h& O0 G& ^user = NULL;
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# _* L, ~2 f; H: p% L8 [! R2 uo New way
// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
LoginResponse response;
* n/ M$ ]( ]- z7 ~Teamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
response = sessionService->login(name,pass, “”,””, descrim );
' x7 L* t. C; A+ Cuser = 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.
if( user.isNull())
{
...
& o, I* H4 O# X# i}
else
{
// Release the instance and
user.release();
}
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