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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, J& \1 G& ?, _& G7 |; g% @+ Y1 变量声明

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o Old way
// Declare pointers for an Item, Form and vector of ModelObjects
1 K9 l8 ^' U  u/ o/ W% a, L// initialize to NULL
Item *theItem = NULL;
Form *theForm = NULL;
vector< ModelObject *> objects;
1 l/ e+ t) `# y8 u1 c* X2 U) h2 v6 V...
7 m/ J0 c4 Y. b// Use the Item
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
: L" u" t8 ]2 w; `+ q: i1 Po New way
  ~: T) {, n' f- }4 V7 }$ H% o- P2 K% J// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
$ h/ ]0 I( b6 tTeamcenter::Soa::Common::AutoPtr<Item> theItem;
; J8 a( a9 q+ }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();
objects = theItem->get_revision_list();

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2 类型转换
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8 B' t2 S, Z: {9 p. r3 q# ~( P$ I// Declare the variables
8 D4 s! m) ^; a8 h8 [User *user;
ModelObject *anObj;
1 P) r7 ]* j% O6 `" yFolder *folder;
7 K% P( E& _' i0 luser = sessionService->login(name,pass, “”,””, descrim ).user;
' t! V; c) |. Z, Y# r% ?& _// Cast to the base ModelObject class
7 Z1 o! y9 N. F( e, a1 B$ M& canObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
( g  T9 V% N4 g( p% K// do something with the new pointer
3 V$ d  L6 |6 r7 huser = dynamic_cast<User*>(anObj);
4 `1 [+ p6 s( u* E1 f0 Lif(user != NULL)
, s3 j7 h8 t+ s{
folder = user->get_home_folder();
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o New way
" d- q$ e( V& v9 [// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
+ Q0 X% X$ F9 i2 M  k/ x) wTeamcenter::Soa::Common::AutoPtr<Folder> folder;
" g( g. q) I( S( W1 s# Ouser = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
  {% _- Q/ n, w// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
8 j: @, h$ r7 P: M* Ktry
  i, Y/ K" m; B$ I; X4 [' u/ p{
user = anObj.dyn_cast< User >();
folder = user->get_home_folder();
}
0 G- X6 w: C+ w2 H; z. C  ^& f/ ncatch(std::bad_cast&){}
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3 关于NULL 赋值

o Old way
+ B8 u, a) C, I8 K; O6 @  C! F2 f* \// Declare the variables
LoginResponse response;
* ~: _* D2 V; i$ k( o+ b$ yUser * user;
// Call a service that returns a ModelObject (User)
; |( O0 A" }9 D. T# x% ]1 ^1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
) J- {! n* o9 \( b1 V& yuser = response.user;
' p9 {2 I' L/ u0 R. Y$ V. y// Test that instnace against NULL
if( user == NULL)
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+ w/ ^4 X2 |, u; s4 Oelse
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% A6 a2 T: c! v// Assign NULL to the pointer
user = NULL;
}
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& ~% V; N" x5 c// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
; j9 h6 N& e" d( |- H0 e. i1 P( C5 C* p; X, BLoginResponse response;
/ w' b& @/ X* A4 ~' a( E1 v, t) h: MTeamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
response = 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
// AutoPtr template class.
) [9 v- \0 l6 l3 F$ cif( user.isNull())
{
...
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else
{
. P( \4 X# n) S% E3 j+ z// Release the instance and
user.release();
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