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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* n* T+ c* [  H) r1 k& W& k1 变量声明
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o Old way
// Declare pointers for an Item, Form and vector of ModelObjects
/ P( w3 k  o5 r4 u' C// initialize to NULL
. G0 a) z2 o* q3 J8 CItem *theItem = NULL;
6 f' A- ~, Y0 I% I- b9 G  }Form *theForm = NULL;
vector< ModelObject *> objects;
5 k2 j6 b% B% W, s- e2 h6 B...
// Use the Item
( B: @( T9 _5 Z( M8 htheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
( N$ m; @( f' F2 W  K+ G# l- jo New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
5 _: I$ O0 F& N) {: h  Q& n5 e// all AutoPtrs are instantiated as NULL
' ?$ f' o/ ^; `0 STeamcenter::Soa::Common::AutoPtr<Item> theItem;
# Q, R. ~5 g! y& g6 \3 ?( e' gTeamcenter::Soa::Common::AutoPtr<Form> theForm;
5 j3 r+ K5 y. c" gvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
5 A9 i  T+ Q4 E% e2 _. ctheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
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2 类型转换

o Old way
. p3 ^- @& A0 z% q/ ?// Declare the variables
User *user;
' Z: f* }, P2 X4 ~5 \ModelObject *anObj;
9 w2 D9 @( ^; ~. Z: j) bFolder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
: }$ J, H, x7 u3 xanObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
/ C  @; m& i8 A' _2 O! x; S! O// do something with the new pointer
user = dynamic_cast<User*>(anObj);
: V" N, J1 T5 X7 f) x' F) ]if(user != NULL)
{
folder = user->get_home_folder();
}
o New way
// Declare the variables
1 P: P: }: l' }Teamcenter::Soa::Common::AutoPtr<User> user;
5 [& [& {! W9 `0 Z5 R( _& eTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
7 b6 a) B7 b- U/ a7 P7 @! WTeamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
. R2 g$ U. x3 S% ^// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
// Put the cast to a speicfic sub-type, in a try/caTCh block
* @- U6 G4 d3 C! L# m  a// if std::bad_cast not thrown, then cast was successful
try
' S8 q' e! E% z1 {- l2 N{
& s& X8 Y  h2 N  u, G% ?' `user = anObj.dyn_cast< User >();
! s0 Q6 U# k# t4 n2 Dfolder = user->get_home_folder();
+ @/ x1 G! Z# r. o5 |}
catch(std::bad_cast&){}


$ b7 D7 P/ r7 _  k0 q  N; i/ w3 关于NULL 赋值

( V) c' s4 \  _/ y6 Qo Old way
// Declare the variables
LoginResponse response;
' s/ Y0 o( o9 ?& t" EUser * user;
// Call a service that returns a ModelObject (User)
) ], I2 H/ e+ c( r, P; i- e8 z/ r/ d1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
  l7 F9 V5 U! F1 [  b" l// Test that instnace against NULL
if( user == NULL)
{
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else
% t) b+ \+ X/ M& i+ c- U{
: T$ w' ~+ k3 c( w6 v// Assign NULL to the pointer
user = NULL;
7 Z1 R5 f3 t; J  k$ g% ?) r}
o 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)
2 A$ i1 G# G" a, yresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Since we are not dealing directly with pointers,
" N  Q: w3 n( z( q4 F// NULL does not make sense here, use the isNull method from the
0 F: {: B- n! W- B# I0 f, \: ~  E// AutoPtr template class.
+ j* e  U$ V- ?if( user.isNull())
{
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else
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// Release the instance and
user.release();
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