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


) e0 u* k& x( L5 C1 变量声明

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3 n. O" R4 Q( H7 zo Old way
// Declare pointers for an Item, Form and vector of ModelObjects
// initialize to NULL
* \* i7 k" d0 n/ S/ J% I; F4 |9 Q7 fItem *theItem = NULL;
Form *theForm = NULL;
vector< ModelObject *> objects;
# K; h- \; V, r0 F% P" Y9 X...
9 J" R$ W! B: m2 X  v& C// Use the Item
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
; D5 S4 A  R) ^o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
2 B7 B* R3 E  U/ LTeamcenter::Soa::Common::AutoPtr<Item> theItem;
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
( W' f5 v$ F1 l1 ^// Use of the ModelObject variables remains unchanged
' u+ d8 m# q1 t$ L& JtheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
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( u7 X: H0 }7 o8 _4 U- U% T+ _2 类型转换
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: t5 g8 ]% m9 X$ |& vo Old way
3 O1 H  J6 Y; Q# R3 _// Declare the variables
User *user;
ModelObject *anObj;
Folder *folder;
6 ?3 e1 n5 U) D( u8 A# huser = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
: I; f5 N! L  m& `2 U7 Buser = dynamic_cast<User*>(anObj);
if(user != NULL)
{
folder = user->get_home_folder();
}
o New way
; y( {" F" c$ s% y5 h  K7 ^. t// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
, V  P$ \" a+ G9 }$ E* l" }  WTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
& f& K2 f8 w# y# y: quser = sessionService->login(name,pass, “”,””, descrim ).user;
  v2 z1 f' M+ d' @// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
// Put the cast to a speicfic sub-type, in a try/caTCh block
# D4 K: J+ u$ A// if std::bad_cast not thrown, then cast was successful
0 ~4 c0 |/ Z3 V& stry
8 ]' G8 p6 e1 J: e; C. b" a  d{
. E( I/ d7 c. N: }user = anObj.dyn_cast< User >();
" J1 @6 \8 N+ z( M  zfolder = user->get_home_folder();
}
catch(std::bad_cast&){}


3 关于NULL 赋值
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o Old way
* O; w9 A3 T% T. |2 v) d) g// Declare the variables
LoginResponse response;
User * user;
' V. L' O& o  g0 b0 M2 Z// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Test that instnace against NULL
if( user == NULL)
" o; W" \0 J' T; @8 L{
...
7 r: w4 N) K8 \9 I% |}
8 F& y; E5 z" |% t2 Y0 J/ felse
3 Z' z- O6 a* O. @. \1 a# x{
// Assign NULL to the pointer
user = NULL;
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, p5 `* y8 s2 V+ c- uo New way
  L* I5 ?: a0 G// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
LoginResponse response;
Teamcenter::Soa::Common::AutoPtr<User> user;
. X) }1 o( b& F// Call a service that returns a ModelObject (User)
% ~  B9 P' E9 O4 q% \# uresponse = sessionService->login(name,pass, “”,””, descrim );
. i& E( ?; n& Nuser = response.user;
// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
8 N: m. A# ^+ ~( p// AutoPtr template class.
if( user.isNull())
{
...
}
* h9 k$ @+ r3 j' x3 j9 `0 ]3 Oelse
{
$ E& r5 G/ y7 c9 t1 Y// Release the instance and
1 g* S% w1 p% ouser.release();
}

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