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
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1 变量声明
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o Old way
// Declare pointers for an Item, Form and vector of ModelObjects
// initialize to NULL
, e: A% P; J& O* v% ?Item *theItem = NULL;
Form *theForm = NULL;
vector< ModelObject *> objects;
...
: q( ^, I, O0 ]9 y/ R4 `0 j// Use the Item
theForm = theItem->get_item_master_tag();
9 W- O% Y* T9 p  zobjects = theItem->get_revision_list();
o New way
6 X+ a6 e1 f0 ]% q3 }8 J# _; x- t" B// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
Teamcenter::Soa::Common::AutoPtr<Item> theItem;
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
5 O1 O) D: h: e' W+ h( bvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
9 R# q3 S$ J% o$ i( B  U// Use of the ModelObject variables remains unchanged
4 b, B0 z! C# vtheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();

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2 类型转换
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1 O5 j" u& l' d* U& vo Old way
' I. y. j5 E; B  B+ ~, ]// Declare the variables
User *user;
1 I2 |- _! ~2 J" g3 |ModelObject *anObj;
Folder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
& s+ N* t9 L6 ?. M. W! ]* @anObj = (ModelObject*)user;
6 [* D. @# J8 T3 m8 g; ]! I; ^2 Y// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
' @) t+ s" ~* d1 R  }$ _) xuser = dynamic_cast<User*>(anObj);
if(user != NULL)
{
folder = user->get_home_folder();
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1 i9 D* i4 [& U/ J1 Go New way
1 }5 A/ N" u! r5 g5 S0 r3 K' d# o// Declare the variables
, A3 Y1 P' q6 n% u8 Q* dTeamcenter::Soa::Common::AutoPtr<User> user;
3 p+ s/ ?$ [- U) b7 ]5 ]Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
9 \9 U/ j! _8 O: e" m" ~1 D# ?user = sessionService->login(name,pass, “”,””, descrim ).user;
2 F- Q. t+ o* S4 x; q// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
try
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user = anObj.dyn_cast< User >();
7 J* e8 Y# f6 l* \folder = user->get_home_folder();
}
catch(std::bad_cast&){}
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3 关于NULL 赋值

o Old way
" F- n( _& `/ u5 A+ S1 }. S// Declare the variables
! A9 y3 C# g2 w( tLoginResponse response;
$ E4 x. m5 P; Z+ `User * user;
// Call a service that returns a ModelObject (User)
* Z' K. O9 [! c2 H) ~1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Test that instnace against NULL
- Z3 V% V1 [. [; ^! J! J; `/ Eif( user == NULL)
{
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}
, ^! Y. l) M' Z# i5 Lelse
+ W( F' z3 O( N  p* }' A{
* l/ B- ~8 z7 ?9 Q; x  z1 |/ w// Assign NULL to the pointer
user = NULL;
}
/ H6 {, d+ `" v; y/ o1 Q& A" c8 A5 Lo New way
4 d, o+ N) S4 F& ~// Declare the variables
// The service data structures do not change, only
& }  {' O6 n5 ^3 i  V( O' m// references to ModelObjects
9 ?& _/ {6 {9 d' J+ XLoginResponse response;
; g& ]: X) X! LTeamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
3 C, S# ?  W: r  S+ oresponse = 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
( Y( M3 c7 s  q// AutoPtr template class.
if( user.isNull())
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  F( {3 j7 y/ ^% p- \/ m+ o...
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else
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// Release the instance and
user.release();
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