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 变量声明

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$ E$ X. C* P0 w9 G9 D5 ^: Io Old way
5 a5 C" L0 D$ l& ?, ^$ C+ n: m// Declare pointers for an Item, Form and vector of ModelObjects
// initialize to NULL
Item *theItem = NULL;
1 a9 X4 U& ]  g+ O6 w# ?% c0 QForm *theForm = NULL;
vector< ModelObject *> objects;
...
# b% {0 R1 M$ B, E// Use the Item
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
o New way
) Q4 J* l( ^2 J! F' t// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
0 L6 }* I. M% D4 {* p% J, v7 KTeamcenter::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
theForm = theItem->get_item_master_tag();
6 Y' v8 A2 `6 ~0 \objects = theItem->get_revision_list();

3 _4 B% p4 e- _" {
2 类型转换
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o Old way
: O3 f$ n7 {3 H+ e: x// Declare the variables
! V. k* i: |' a; w3 J; SUser *user;
1 L' e5 q1 N, l1 H; sModelObject *anObj;
Folder *folder;
4 C/ P/ N; f" F% N* I+ x8 ]# ~: c# }5 D2 huser = sessionService->login(name,pass, “”,””, descrim ).user;
) ~; ]; i2 S0 s// Cast to the base ModelObject class
+ x3 W3 T1 u4 A  [* E5 i# sanObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
9 C0 H7 x% ?( q& w: h// do something with the new pointer
user = dynamic_cast<User*>(anObj);
* N  K+ g3 V4 n/ h0 gif(user != NULL)
9 R7 [! Z: K  r4 V! R' h7 z{
7 ?6 Q& k- q2 ]9 T8 X, @/ O$ H7 S" `folder = user->get_home_folder();
}
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// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
2 g( i  t6 ?, |user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
// Put the cast to a speicfic sub-type, in a try/caTCh block
  _" ^4 L8 t  _& v+ ^7 m// if std::bad_cast not thrown, then cast was successful
/ U4 p3 F# W! u7 l5 z6 Otry
$ Z: R& O0 s: e& t4 p{
% D. D4 S  D5 h* G- L- V) k1 Buser = anObj.dyn_cast< User >();
folder = user->get_home_folder();
}
+ J& ?, G" I4 t" O2 l+ \catch(std::bad_cast&){}
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+ I1 W; s; n% x8 k3 关于NULL 赋值

o Old way
// Declare the variables
8 r! ^" @1 M" Z) R" wLoginResponse response;
User * user;
// Call a service that returns a ModelObject (User)
% N( O+ H- `' [- T1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
) {& ~& W# e( ]. O' Z0 @user = response.user;
// Test that instnace against NULL
if( user == NULL)
{
...
}
' |( d4 _+ i0 N. o6 t/ welse
) e, O2 |; ^  q: B{
+ O& S' Z5 h% n// Assign NULL to the pointer
" Q% V8 y4 u! ~7 [6 [1 Iuser = NULL;
}
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)
3 o& v3 H3 R! A  x5 xresponse = sessionService->login(name,pass, “”,””, descrim );
* M% W+ g# [& `3 X& {user = response.user;
8 K2 @& F) t3 h9 d// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
" x) T5 r: r0 B// AutoPtr template class.
/ H/ v# |* G$ U9 W+ v& V5 Bif( user.isNull())
+ c5 `9 b( m/ R{
...
6 N1 `1 b0 E7 w+ H$ q! [' p}
( s$ ]' Z3 m2 ^else
{
// Release the instance and
user.release();
* W( |" Q# e2 g; M2 Q}

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