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


1 变量声明


7 \9 V: n+ a! x0 a9 Q6 Qo Old way
// Declare pointers for an Item, Form and vector of ModelObjects
! z  j4 z, R8 q// initialize to NULL
Item *theItem = NULL;
8 \3 e( p3 d8 q% S$ s( GForm *theForm = NULL;
: h, y) Z% `0 {$ y& hvector< ModelObject *> objects;
...
// Use the Item
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
) B1 P. L1 @$ @( ~o New way
3 I4 f# q- Y( K2 H// Declare AutoPtr for an Item, Form and vector of ModelObjects
. a. T3 X0 r/ o7 a// all AutoPtrs are instantiated as NULL
( S7 o$ a: ?# t( O/ mTeamcenter::Soa::Common::AutoPtr<Item> theItem;
" ~2 R4 H2 X9 U+ d! e$ z$ V4 b0 r* HTeamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
" d; s& c: B0 H3 r& u// Use of the ModelObject variables remains unchanged
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();


0 r4 h% q8 `$ ^9 h0 _2 类型转换
: i1 l- e2 Q+ o: H
3 ~3 ]; {( _  w  s% j. t3 \o Old way
// Declare the variables
User *user;
( ^9 _* o9 p( L8 _; }! ?ModelObject *anObj;
8 B' w' P2 o: _Folder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
, ^1 @6 {; S- i2 K4 j1 w) ?5 |// Cast to the base ModelObject class
2 y' I. u% J  O$ d* x! @anObj = (ModelObject*)user;
% M  T4 Z2 ~$ Q- d/ e( ]: J. [4 B// Cast to a speicfic sub-type, if not NULL
* i! F+ U/ _7 H8 @9 x! t( }// do something with the new pointer
user = dynamic_cast<User*>(anObj);
" C& l$ n4 _; M8 }4 z" Aif(user != NULL)
{
9 [/ ?! K* B2 T1 V6 c2 @folder = user->get_home_folder();
}
o New way
2 C/ [: }, R& r- j6 Z4 \+ R// Declare the variables
& @; [+ [# p) J6 Q) z1 i; d6 KTeamcenter::Soa::Common::AutoPtr<User> user;
, i/ y5 W+ f/ P: z$ }5 t0 aTeamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
& S7 R- B% }9 `$ sTeamcenter::Soa::Common::AutoPtr<Folder> folder;
$ K$ ~: p5 C! f: F: k; F; vuser = sessionService->login(name,pass, “”,””, descrim ).user;
4 F* o5 @2 _* `5 q1 y// Cast to the base ModelObject class
: t. V; j/ Z/ ?! zanObj = user.cast<ModelObject>();
, ^6 O  _7 f5 t// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
7 K2 \& r  B  U* c! }" I5 \try
) _% K( X1 ~" n5 p6 }. p{
user = anObj.dyn_cast< User >();
" S- C6 R7 H4 Y0 e' _- O. v" w$ wfolder = user->get_home_folder();
}
5 R/ t1 u+ o/ p1 M. Gcatch(std::bad_cast&){}
4 _3 J# Q  {1 ^- v
: ^& d3 N4 r( x+ S# G3 B+ ?1 A
9 _8 Y( x) f- p1 J  _1 o* c' h+ J4 D8 x3 关于NULL 赋值
( [9 X* `; e# t! P' q. }
0 m& t$ ^- s/ r- S/ t1 Ao Old way
// Declare the variables
LoginResponse response;
User * user;
9 q3 O* N' O$ F& t0 m7 p// Call a service that returns a ModelObject (User)
6 }: U* W$ n* G' ]1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
, e1 g" E7 C- ?9 M3 Duser = response.user;
// Test that instnace against NULL
' `# x1 X" ~6 d* Iif( user == NULL)
# P9 P. @  H/ q1 ^* k+ _  w{
...
/ n8 X( r; A4 I# Q# _8 ~3 X}
else
# f6 ?! H+ d! Q/ C{
4 X! x: K7 T/ V" A8 k// Assign NULL to the pointer
user = NULL;
}
o New way
; X# r) Q  C3 @3 b/ \// Declare the variables
% l9 l) T5 C' M// The service data structures do not change, only
// references to ModelObjects
LoginResponse response;
4 U7 o1 t, ]; f9 Q0 v* j$ o5 hTeamcenter::Soa::Common::AutoPtr<User> user;
# z3 x# I1 G2 x! `9 p( @// Call a service that returns a ModelObject (User)
4 B, e, q+ Z3 L7 y- Eresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Since we are not dealing directly with pointers,
7 {1 J$ r# ]5 @% N/ a* r// NULL does not make sense here, use the isNull method from the
8 b4 a4 |% n7 m9 o// AutoPtr template class.
if( user.isNull())
{
8 O2 P1 j% G' l6 y4 _3 q...
}
! g& ?9 ?; Z5 Z& D2 I* e, L3 Eelse
! ~; X3 d0 Z3 i7 y; e& x: M{
% y& B( F- b+ c: a6 m// Release the instance and
user.release();
. w7 Y. V" C6 B  {3 h3 a2 {$ c0 A}