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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" {- h* R0 W- p* A$ V. `) I* ~1 变量声明
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# ~5 U) V2 g7 Y& F; N( p: vo Old way
// Declare pointers for an Item, Form and vector of ModelObjects
// initialize to NULL
7 |0 i' l( R# z# B4 l8 jItem *theItem = NULL;
0 t# c$ L3 v( E5 s3 \Form *theForm = NULL;
- r4 H, k- c- A9 S7 Y/ fvector< ModelObject *> objects;
...
// Use the Item
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
2 ]$ B- O) S' W1 E0 B/ X% fo New way
' V2 s! _4 Y6 F; ]" _9 j' G& p0 R( Z// Declare AutoPtr for an Item, Form and vector of ModelObjects
; o- N. e* z! x, r2 I9 [1 V+ V// all AutoPtrs are instantiated as NULL
' B. g) x- F9 W% z5 XTeamcenter::Soa::Common::AutoPtr<Item> theItem;
* a& J, M3 f& n1 x0 eTeamcenter::Soa::Common::AutoPtr<Form> theForm;
2 N2 y$ y3 ~* t3 v; uvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
$ B5 A; {% t) @* l$ w, F6 W7 ]+ ~6 K// Use of the ModelObject variables remains unchanged
) v- e& C1 Q' Z+ |8 mtheForm = theItem->get_item_master_tag();
9 K- t; R% o4 J: }, P1 Fobjects = theItem->get_revision_list();
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2 类型转换
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// Declare the variables
+ M' [3 K- M. ?6 ^" k& [User *user;
ModelObject *anObj;
Folder *folder;
8 P' G$ c/ u! Juser = sessionService->login(name,pass, “”,””, descrim ).user;
" w: w" H5 E; j// Cast to the base ModelObject class
anObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
) Q# ^$ B( R5 j7 i, |3 C' v5 k// do something with the new pointer
( Z! w! r7 g$ W/ v* z0 `* H8 @user = dynamic_cast<User*>(anObj);
if(user != NULL)
{
folder = user->get_home_folder();
% J% b; U# P& S# r" ?: c& a# G}
5 L) q. r6 V( Io New way
// Declare the variables
8 O, p0 ]5 G+ p% F% W: |+ p. XTeamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
+ y" P( c7 N& ]8 Q# t! U9 u, D2 aTeamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
( T1 _* m( D: Y. s1 w5 @7 {// Put the cast to a speicfic sub-type, in a try/caTCh block
; {" ]/ V% Y' T! h! L5 G: ^// if std::bad_cast not thrown, then cast was successful
* \5 v6 N  D% C. Wtry
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' }( b/ I# {! Z/ x! V3 e; y) u5 Auser = anObj.dyn_cast< User >();
folder = user->get_home_folder();
}
( @. ^3 L* i$ xcatch(std::bad_cast&){}
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3 关于NULL 赋值

$ ^, ~0 F6 T# v. x# B; W" _o Old way
// Declare the variables
LoginResponse response;
User * user;
/ I; Y6 g: m; x7 k' z// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
# W/ N0 [# l  @1 fuser = response.user;
, \" g+ c3 V' u- F) T% m4 B// Test that instnace against NULL
if( user == NULL)
' p0 G8 m4 a( a. Y) \8 B{
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6 V8 n! v% |/ _$ U2 u}
else
/ M2 t. i. T0 V! Y{
// Assign NULL to the pointer
user = NULL;
}
  _  ?! d7 }  }% u( j3 co New way
// Declare the variables
. z& Z' p1 H% O$ A: G& ~// The service data structures do not change, only
3 Z; _$ b+ m6 x) k, `6 W6 |// references to ModelObjects
6 H/ P- s, r( v) i* }% f: B" JLoginResponse response;
, j) [% c$ R' Y9 f# HTeamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
8 d. O2 f0 {7 ?9 Z* [# p+ gresponse = sessionService->login(name,pass, “”,””, descrim );
/ D+ l! Z/ n: P5 n' W3 @user = response.user;
/ Z0 k& ]$ n' o( L: D3 l; f// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
4 \: S2 E7 A8 o2 N9 f// AutoPtr template class.
4 w2 m& O6 g7 E" K) Bif( user.isNull())
7 ~' D6 {0 S  t6 A{
...
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: H+ e8 y, H9 D! jelse
{
% t$ {& f6 E% a' w3 s- R// Release the instance and
+ W  z! m5 s) O: a" u- ^$ V1 G7 luser.release();
1 F1 j7 ?$ U* Z4 x: k3 D# _  x}