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


o Old way
. {7 ~/ @! {5 I$ p// Declare pointers for an Item, Form and vector of ModelObjects
$ x% z" W: [" x3 w% P// initialize to NULL
Item *theItem = NULL;
" q. N2 C, T, o3 rForm *theForm = NULL;
vector< ModelObject *> objects;
...
// Use the Item
7 B3 r% o+ X( i" BtheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
( k6 `$ C4 u/ k% o: E# Y// all AutoPtrs are instantiated as NULL
Teamcenter::Soa::Common::AutoPtr<Item> theItem;
# L2 s/ T4 Q, R+ g% H+ HTeamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
# i- G# ^$ u3 ]9 l6 RtheForm = theItem->get_item_master_tag();
: s' S5 L$ {/ c. d5 iobjects = theItem->get_revision_list();


( j0 C+ G) S1 \& m$ }" z2 类型转换

o Old way
// Declare the variables
/ J! ~2 {$ W/ t* V4 Q6 y' NUser *user;
! u1 Q& U8 A1 S* U5 @( q. S: yModelObject *anObj;
# }- v4 B2 ~1 `2 b8 \8 m8 X6 CFolder *folder;
+ w! D( i5 u. u. P7 ?1 duser = 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
+ `* G' e" J" `; `' ]2 h' \9 Q& Huser = dynamic_cast<User*>(anObj);
if(user != NULL)
0 k1 G* h- r& K1 @+ _7 i{
folder = user->get_home_folder();
' w5 r8 e5 S: E}
, b. _0 l& R1 Q; _o New way
// Declare the variables
* i! z7 j2 h4 Q* x3 l2 d& ETeamcenter::Soa::Common::AutoPtr<User> user;
1 N- n1 L7 [* m, m# NTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
4 h, w! a: F5 j' ]' N, r- p* H& UanObj = user.cast<ModelObject>();
9 l) L$ m2 y* ]* H5 X// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
try
{
user = anObj.dyn_cast< User >();
folder = user->get_home_folder();
}
- i! G: w. U1 ?4 S& K& q% L4 lcatch(std::bad_cast&){}
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7 ]8 D1 D4 W: ?3 关于NULL 赋值
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' K- w. R+ r1 O* eo Old way
, F! R9 A) H7 R# D// Declare the variables
. H. d: M, `. I' G0 ~, d' r* k& wLoginResponse response;
1 z: }. |. d' Q8 Y, h) X. zUser * user;
// Call a service that returns a ModelObject (User)
7 X7 ?1 f. e9 p. N* \% _1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
( A1 n' Z) @1 h, N8 @6 Auser = response.user;
( w3 [# w. J. S. N" \) w2 L  f// Test that instnace against NULL
if( user == NULL)
# V. S: |1 L# B; f$ |{
...
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else
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// Assign NULL to the pointer
user = NULL;
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o New way
// Declare the variables
// The service data structures do not change, only
8 E9 Q% J" x% q: d// references to ModelObjects
LoginResponse response;
Teamcenter::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,
: u% ^$ B. q0 x  d; \' \2 ?// NULL does not make sense here, use the isNull method from the
// AutoPtr template class.
if( user.isNull())
5 G! f/ }4 M$ q8 L$ p1 |{
...
}
2 ~  f7 Z* W3 c+ C2 h/ ?else
8 x3 S( @2 e$ `9 b{
// Release the instance and
4 M9 D% e3 B% [/ }/ W; fuser.release();
}
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