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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: z; h  w: h5 s* A3 ao Old way
// Declare pointers for an Item, Form and vector of ModelObjects
% [* ]( e9 s% F! z3 w// initialize to NULL
Item *theItem = NULL;
Form *theForm = NULL;
vector< ModelObject *> objects;
2 }+ U% `* M. E/ e$ G) O! s7 P...
// Use the Item
theForm = theItem->get_item_master_tag();
( |. I- t3 f" yobjects = theItem->get_revision_list();
1 F* A, v+ I0 d4 N# Ro New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
: v% ~# X* F+ T7 B' l& |Teamcenter::Soa::Common::AutoPtr<Item> theItem;
' ?  s- Z8 y, a! }5 pTeamcenter::Soa::Common::AutoPtr<Form> theForm;
6 Y% E* E) u) ~9 [/ _6 \; nvector< 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

o Old way
// Declare the variables
) m) v2 ^! y; J6 {! E7 vUser *user;
ModelObject *anObj;
Folder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
, X8 y" S2 |; h/ f// Cast to the base ModelObject class
) u) ~* q& p. Q% kanObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
user = dynamic_cast<User*>(anObj);
3 Y, G8 W% b* v/ j2 _0 S/ Bif(user != NULL)
  E2 @8 ?+ }+ E1 l" D, q# v2 _: I% Y{
7 ^2 T& w. P# V: n! yfolder = user->get_home_folder();
}
o New way
// Declare the variables
  F$ w) q6 N* f2 }' N7 c. S: O0 p" V; `Teamcenter::Soa::Common::AutoPtr<User> user;
  \% @/ M* L( c$ ?Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
1 C5 \' S9 r; p" Q: [% ^6 pTeamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
% K3 M1 I7 @$ E3 n: m! x" S" @1 h// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
1 z3 e, N8 l$ @& F0 J0 Jtry
{
user = anObj.dyn_cast< User >();
/ n$ p0 u( z. y+ P# L/ o, Ffolder = user->get_home_folder();
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catch(std::bad_cast&){}
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3 关于NULL 赋值

! w4 ~1 p, G+ c8 h8 wo Old way
2 g9 Z9 X& r- s// Declare the variables
: f" g  ?& @8 N; A7 M$ M% F* qLoginResponse response;
) _8 a: L6 A6 ^% o$ U& MUser * user;
// Call a service that returns a ModelObject (User)
& W5 a, O- t' q# L1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
5 L5 J2 W4 i3 q5 X' vuser = response.user;
// Test that instnace against NULL
2 Y+ j6 B7 G" W; ~if( user == NULL)
{
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  n$ b/ W, P9 H7 `  c; C2 Z- x$ h// Assign NULL to the pointer
user = NULL;
}
o New way
// Declare the variables
  P  C6 g3 U2 g! W; l6 i// The service data structures do not change, only
3 A# }8 d% s, h// references to ModelObjects
, {. f9 G1 k; OLoginResponse response;
Teamcenter::Soa::Common::AutoPtr<User> user;
8 W# g! G  ~0 H# Q! `$ c8 n// Call a service that returns a ModelObject (User)
# ]9 f* z% `7 g0 n5 m+ Dresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
% w# X8 \9 U0 n1 h. x' T// Since we are not dealing directly with pointers,
/ l- ?2 e; L2 v' z2 `// NULL does not make sense here, use the isNull method from the
// AutoPtr template class.
" b0 V( e: b+ X6 b+ m; ^if( user.isNull())
{
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+ d! \! y0 g1 i0 X6 D% oelse
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// Release the instance and
% G# m' [* z! c* R" g: s) x5 Guser.release();
}
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