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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( W% N4 A# D; ^0 _! q: v2 ~) x& |1 变量声明

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# P, ^$ f' x" n1 Ko Old way
. Q3 K: ^* {3 C6 Z7 N. a* ^// Declare pointers for an Item, Form and vector of ModelObjects
// initialize to NULL
3 f/ n# m& r) a6 CItem *theItem = NULL;
Form *theForm = NULL;
vector< ModelObject *> objects;
" R: W# D/ S: i3 B...
// Use the Item
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
& `$ C: ?& W# G0 G) {+ I// all AutoPtrs are instantiated as NULL
Teamcenter::Soa::Common::AutoPtr<Item> theItem;
5 p) C2 D. @9 e" STeamcenter::Soa::Common::AutoPtr<Form> theForm;
: e* J& q% `) }* H4 O$ q/ uvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
/ A5 k* b* U/ N' o// Use of the ModelObject variables remains unchanged
4 ~. w1 q, I( a: H5 {: StheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
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  f' g/ y( ~  Y  q  }2 类型转换

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8 T* V; j7 V9 U// Declare the variables
User *user;
: d. v) K4 }! S8 Y+ }  KModelObject *anObj;
; ?, I" }" F4 e- eFolder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
7 c4 b* J: D8 j" H( VanObj = (ModelObject*)user;
9 l6 c& s! q7 I, m, j) ^1 c// Cast to a speicfic sub-type, if not NULL
8 U! c2 E! d- Q; a$ X: E! r// do something with the new pointer
user = dynamic_cast<User*>(anObj);
3 y* P9 @1 z' h& X3 M5 \5 sif(user != NULL)
; U% u3 ~. g  P  p/ I) e{
folder = user->get_home_folder();
" w" ~+ g5 C: P0 S: }6 `& j}
o New way
// Declare the variables
" i/ ]& \8 r1 N3 s: t1 C' a& {Teamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
3 b) ?+ X2 U& c% I# _anObj = user.cast<ModelObject>();
8 i' T8 M* u: l! C// Put the cast to a speicfic sub-type, in a try/caTCh block
0 ]1 E$ S- F3 h" ]" b/ }4 Q// if std::bad_cast not thrown, then cast was successful
, K: G% ~$ _% |" y9 jtry
{
user = anObj.dyn_cast< User >();
- g+ @1 S! O. `& s8 I) ^2 Dfolder = user->get_home_folder();
  T2 y0 f/ q2 ?$ j6 x* O4 Q4 O}
9 C- W: J7 Z8 T1 icatch(std::bad_cast&){}

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/ N% F7 J, @2 {8 }. s& Z% O9 `3 关于NULL 赋值

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, O$ x( ^! N( K' r! p& n// Declare the variables
LoginResponse response;
% H; r# h9 c- Z0 Z* CUser * user;
  H) x) }1 Y4 E, k6 A# M+ a0 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)
( K7 c" I: _/ h, ?{
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else
{
  q& P" {% f9 o// Assign NULL to the pointer
user = NULL;
}
/ K! ]$ ?& i9 K# d8 V5 S5 C- Yo New way
// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
LoginResponse response;
Teamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
$ ~8 u$ b4 c6 F9 H. a: u0 Cresponse = sessionService->login(name,pass, “”,””, descrim );
+ u, @1 [9 ~- p/ puser = response.user;
7 j$ }  v" ?7 B9 G0 a// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
: I; ?4 k( }# D0 Z! n// AutoPtr template class.
9 O& @+ z6 `( H) V, w; qif( user.isNull())
3 d; `* D0 ?. D{
...
}
else
{
// Release the instance and
! h1 m, j8 m, g! u/ Y# t8 Zuser.release();
}


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