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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o Old way
- K- D  g; Z; o& c7 N) s1 f; l( o  ^// Declare pointers for an Item, Form and vector of ModelObjects
% ~. S% e# i8 T' Q' \. R// initialize to NULL
: t1 n' y* B1 Z, c7 Z; U1 y9 C1 cItem *theItem = NULL;
Form *theForm = NULL;
5 T, W9 _  U. ~9 O9 x+ n$ Rvector< ModelObject *> objects;
; _( m; y6 l; z0 J! U4 E! Y...
! ?) j; U8 @" p5 R5 t- M7 L6 {- p// Use the Item
theForm = theItem->get_item_master_tag();
* t6 t4 X5 ?9 nobjects = theItem->get_revision_list();
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// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
  Q, ?. s. }' c+ g; }Teamcenter::Soa::Common::AutoPtr<Item> theItem;
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
) l8 j$ s; [, j8 H5 g' ~6 E# Xvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
% W. Z# b# q) `theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
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2 类型转换

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: J3 A1 [( Q& }, z$ n( T/ k8 S// Declare the variables
3 u  O4 \+ L; M0 L, G  v; c6 E6 iUser *user;
ModelObject *anObj;
Folder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = (ModelObject*)user;
3 F- K5 o: l9 t9 M  U// Cast to a speicfic sub-type, if not NULL
# x" B' v/ ]- @: n/ i1 A; I// do something with the new pointer
7 b, p" B+ w7 Juser = dynamic_cast<User*>(anObj);
if(user != NULL)
{
folder = user->get_home_folder();
}
o New way
4 G2 |7 \( B! F2 {2 o// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
( i; Q( K0 r& V6 MTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
8 }8 B! N9 e3 ~: Wuser = sessionService->login(name,pass, “”,””, descrim ).user;
: O+ J% A& s( s9 d, `) z// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
// 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 >();
& I: ]" e$ P0 Cfolder = user->get_home_folder();
}
catch(std::bad_cast&){}
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' [+ y) z8 ?7 P$ {$ i2 K/ f( C3 关于NULL 赋值

o Old way
6 l+ |, Q% D* h! g// Declare the variables
LoginResponse response;
User * user;
// Call a service that returns a ModelObject (User)
6 L* V: M) Z. L, _8 S5 S9 a( t: Q1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
' u/ l, c5 b7 {7 F! ^// Test that instnace against NULL
if( user == NULL)
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...
}
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{
3 K& K, b& Q$ {. O: l// Assign NULL to the pointer
user = NULL;
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9 U5 |! i% h3 f2 I  h0 Yo New way
2 N6 Q0 d" E1 S! g4 Q, d// Declare the variables
+ C0 z% j' x9 V. U// The service data structures do not change, only
$ i7 ?  B* z; v" S  \// references to ModelObjects
, ?5 D9 `7 c: p' N0 z$ c9 mLoginResponse response;
7 J6 ?  {1 I: _  o/ Q! mTeamcenter::Soa::Common::AutoPtr<User> user;
1 {9 l: H8 Y& y9 }+ s8 _// Call a service that returns a ModelObject (User)
! _$ G% ]3 V" [# lresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
& a8 j% }1 ~5 j7 x' Y5 o( B% Q// 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())
{
...
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2 V. M# K8 l5 B* ]3 q3 felse
9 W$ I5 x& a) X2 }8 F* }4 K7 ^  g{
// Release the instance and
- S- F/ k0 R4 S) ^- W4 R, c, L  muser.release();
}
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