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
7 t) m) m0 y- D2 O5 |// Declare pointers for an Item, Form and vector of ModelObjects
, R* _: g7 j! Z. B$ ], L// initialize to NULL
) n* I9 t8 g1 xItem *theItem = NULL;
) z& N/ p: K$ f+ [: E$ fForm *theForm = NULL;
/ E/ j) p$ V/ q6 q" D7 Vvector< ModelObject *> objects;
...
+ i4 C4 q4 f1 {2 d// Use the Item
7 W. u1 Q" O+ O' a6 I& ]0 QtheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
4 I; j( @$ k0 J4 f. E4 p// all AutoPtrs are instantiated as NULL
Teamcenter::Soa::Common::AutoPtr<Item> theItem;
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
theForm = theItem->get_item_master_tag();
) Y3 [- i; H6 q8 Mobjects = theItem->get_revision_list();

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) ?6 n1 |9 ], T: ]. c) i# o/ a2 类型转换

0 p: D) B. ?" b, E. ~' po Old way
) P$ L' y7 Z1 Y+ e// Declare the variables
  F6 O4 D) g: JUser *user;
ModelObject *anObj;
Folder *folder;
# F" k& T- ]1 _" S! A$ }! U7 L% o9 Wuser = sessionService->login(name,pass, “”,””, descrim ).user;
$ n5 ?0 }9 P4 Q; X5 D9 P1 x- D: c// Cast to the base ModelObject class
anObj = (ModelObject*)user;
* I  @  Y/ ]; E; S2 h+ S" r1 @// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
user = dynamic_cast<User*>(anObj);
1 t% n9 }- U' ^1 q& b2 ?9 Fif(user != NULL)
{
' m" W3 z: a" E. s7 A7 Y! Ifolder = user->get_home_folder();
8 f0 _* T. U. Q: O6 U}
o New way
// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
' F& X8 t8 o* b5 O$ z5 U3 oTeamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
0 }* x% }/ ]! }anObj = user.cast<ModelObject>();
( n' N+ f8 J8 t7 t/ u- X// Put the cast to a speicfic sub-type, in a try/caTCh block
6 N) o& m( A; E8 M// if std::bad_cast not thrown, then cast was successful
try
{
user = anObj.dyn_cast< User >();
folder = user->get_home_folder();
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catch(std::bad_cast&){}
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3 关于NULL 赋值
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o Old way
# J: L% i/ s7 _5 T1 t" q" P+ k// Declare the variables
. q; @+ `/ m; _+ K+ wLoginResponse response;
User * user;
// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
2 w' {, V. q: u4 B# t" d% k. t// Test that instnace against NULL
if( user == NULL)
{
...
}
, i% j9 A2 e0 q) x: Eelse
6 @9 ^6 w, v4 P{
// Assign NULL to the pointer
user = NULL;
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o New way
* \  _1 G: _3 J, y2 A// Declare the variables
// The service data structures do not change, only
7 {5 E* U+ t- v// references to ModelObjects
LoginResponse response;
7 K; ?2 Q4 E8 d/ z# p  {Teamcenter::Soa::Common::AutoPtr<User> user;
  |$ e2 ^3 h9 P! K) o4 p5 w8 Q; r// Call a service that returns a ModelObject (User)
( g. u+ ?4 u  a/ Zresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Since we are not dealing directly with pointers,
8 j* [1 Q# ]# k// NULL does not make sense here, use the isNull method from the
: K+ J9 t5 G7 s8 y, z5 W// AutoPtr template class.
if( user.isNull())
{
...
}
else
{
// Release the instance and
user.release();
}
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