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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  _$ M% Q6 s5 y1 变量声明
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! P: d+ E- q5 s- c% U- u8 a% y( to Old way
// Declare pointers for an Item, Form and vector of ModelObjects
7 C0 ~, j' h" v/ [  b6 p% x// initialize to NULL
Item *theItem = NULL;
Form *theForm = NULL;
, F. P9 y( T0 A" \' |  [vector< ModelObject *> objects;
...
// 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
0 y& `  R4 n7 @9 W  f% O' A// all AutoPtrs are instantiated as NULL
7 ~$ Z% F+ q( x  @1 g6 RTeamcenter::Soa::Common::AutoPtr<Item> theItem;
9 Q5 k! O! h) x+ s4 J  Y( iTeamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
3 U9 {9 |2 |) A, v6 H# p1 Q2 U// 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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// Declare the variables
User *user;
$ |+ _% }# y1 XModelObject *anObj;
Folder *folder;
7 r: O5 _8 ^0 U( Zuser = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
user = dynamic_cast<User*>(anObj);
" k9 k, q; s  L2 F) cif(user != NULL)
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folder = user->get_home_folder();
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o New way
// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
8 k, z4 L# x) S* A7 K. K* UTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
0 O) q5 p8 p$ L6 }$ H# H9 K// Cast to the base ModelObject class
+ a5 s, R5 n% a, C! }4 u; AanObj = user.cast<ModelObject>();
) S' a% L+ ]5 a. F// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
try
  E$ A7 S/ a% _8 K( m0 f* a{
+ u: [' ~" _* P& E( F# h6 zuser = anObj.dyn_cast< User >();
  ^" [% u0 E- R+ v# |+ Efolder = user->get_home_folder();
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catch(std::bad_cast&){}
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3 关于NULL 赋值

o Old way
// Declare the variables
" v1 I$ @4 y$ `+ E( h& ~) ~9 ~1 _( `$ HLoginResponse response;
2 r' d' _; W3 AUser * user;
// Call a service that returns a ModelObject (User)
- o, w6 ~0 h: l% g# r4 {1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
, C3 I% }) p. I8 F// Test that instnace against NULL
if( user == NULL)
{
9 T3 w6 P, r+ B; z# g! d& k...
}
3 h+ r& Q' E: z$ Lelse
{
' Y9 T5 \1 B/ D// Assign NULL to the pointer
user = NULL;
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8 q- o4 W4 Y0 n& w  eo New way
! e' n4 ~, l0 h// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
LoginResponse response;
# }) P6 O7 h2 C) e5 N. V: CTeamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
: v# h5 Z1 C: T- Xresponse = 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.
if( user.isNull())
5 w: |4 T/ I( Q1 G8 [5 i{
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else
{
8 B8 r) `8 s% o9 J) q/ ]2 U4 C// Release the instance and
, u. P) c8 S+ }" cuser.release();
}
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