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 c/ L6 I8 P, [! P: c1 变量声明


- p' f1 G3 J. b, p2 T7 r5 h$ g9 c! u: ]o Old way
// Declare pointers for an Item, Form and vector of ModelObjects
$ a7 h$ W7 {3 r8 i/ M3 q// initialize to NULL
Item *theItem = NULL;
Form *theForm = NULL;
( t* X. e5 p: evector< ModelObject *> objects;
...
, r0 [3 A  Q  F9 `" e) ]// Use the Item
theForm = theItem->get_item_master_tag();
9 ?% x$ v  W7 ?% L% N% C8 Jobjects = theItem->get_revision_list();
3 y& Z2 e7 z+ ?3 s& e! h7 M3 s; Lo New way
. \1 o- V0 _' ]8 v% k8 [8 }// Declare AutoPtr for an Item, Form and vector of ModelObjects
" X+ n  c0 g! Y  [8 B3 q/ O: d// all AutoPtrs are instantiated as NULL
Teamcenter::Soa::Common::AutoPtr<Item> theItem;
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
0 ~$ t4 \) m: l8 ztheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
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5 @& p( f- P  s. o% J- {2 类型转换
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o Old way
// Declare the variables
User *user;
  U' ?6 |6 Q/ X. E. zModelObject *anObj;
  m: v- J" O) ?; e! ]( u9 BFolder *folder;
' \. J0 U& ], ]1 Puser = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = (ModelObject*)user;
8 j+ L, w- }! v+ p, I" B& n0 P// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
user = dynamic_cast<User*>(anObj);
if(user != NULL)
: ?! Y% Q7 c% r3 ?+ Q{
' \1 C- @7 x( H! ?5 _folder = user->get_home_folder();
8 R, |$ x! X! I4 t. N+ U}
o New way
// Declare the variables
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
anObj = user.cast<ModelObject>();
0 n- ^7 @+ {% h* @, H// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
/ v+ Y" D) r9 g' Etry
- _+ B4 z" I! M& b2 @9 z{
- E/ Z; n( g% ?: euser = anObj.dyn_cast< User >();
folder = user->get_home_folder();
}
0 e. q8 m3 `, C" pcatch(std::bad_cast&){}
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3 关于NULL 赋值

o Old way
// Declare the variables
, _" o' Q7 q. L5 VLoginResponse response;
User * user;
1 Q/ j' D( g) w  F// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
( N% g0 J/ {3 u4 G4 f& K% \1 ouser = response.user;
// Test that instnace against NULL
& B. n4 ~+ \- w- Y. c1 \if( user == NULL)
{
+ ~! Q0 X$ c" Y. r; P3 @; ^! S...
}
" {$ i, g* l3 K* Eelse
{
// Assign NULL to the pointer
0 Q; C! F/ q" Q; {user = NULL;
}
o New way
5 G* I# P( ^7 _2 ?: _5 U2 ^// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
  M' t0 |9 o6 u% o2 `LoginResponse response;
Teamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
response = sessionService->login(name,pass, “”,””, descrim );
) H; P; T2 k1 ^user = response.user;
// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
$ [( q, x3 Z- v& [' C// AutoPtr template class.
9 X* j+ a' n; o, s- i9 |8 Bif( user.isNull())
9 X: r- Y5 v# v* t6 B, a) t1 Y  H) x{
5 \* r$ B5 C8 i) B% v; y, [...
+ X* s; @: ?; L0 W& @}
$ ]1 _6 c/ N+ H2 [% V  Relse
{
// Release the instance and
user.release();
# g9 _+ Q. a9 g}

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