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


$ ~- N; w1 ~$ C. ~1 变量声明


o Old way
// Declare pointers for an Item, Form and vector of ModelObjects
. y6 X0 i" h' o& O& {// initialize to NULL
Item *theItem = NULL;
" q( k! ?6 D* DForm *theForm = NULL;
vector< ModelObject *> objects;
( F! A. }( n/ X2 c...
, u8 ?! C( b7 y1 z/ U, m' g. b8 X// Use the Item
/ V. J4 ^' ]1 g- x! a" ]8 d: ntheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
) z3 e- A8 e1 ^o New way
; }6 d; `/ {& T# u/ e5 T, E// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
4 W6 z6 ^3 Y" ?/ q+ rTeamcenter::Soa::Common::AutoPtr<Item> theItem;
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
! g4 H, m1 j/ [) g// Use of the ModelObject variables remains unchanged
: k, h& k& _/ i9 a( btheForm = theItem->get_item_master_tag();
/ Q% K! Q8 Z& ^1 W& Eobjects = theItem->get_revision_list();

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! L* x& B; r4 v% p  e8 L$ i7 @% j2 类型转换

o Old way
6 r1 r& z7 }/ B& j& Z8 z8 b1 \% @// Declare the variables
User *user;
ModelObject *anObj;
6 T3 i$ T0 P( ]7 d% Y! u7 z8 d2 nFolder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
! j3 ?$ `" F) r0 J5 Y// Cast to the base ModelObject class
anObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
% x6 b2 T+ M& [  d, R. A7 Wuser = dynamic_cast<User*>(anObj);
if(user != NULL)
{
folder = user->get_home_folder();
}
o New way
// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
. s" t# s3 T% b( |user = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
* C( @" P! [0 k* i' L9 u// Put the cast to a speicfic sub-type, in a try/caTCh block
, r8 _8 Y4 T7 K9 e: U// if std::bad_cast not thrown, then cast was successful
try
{
$ B5 d- V% d0 Juser = anObj.dyn_cast< User >();
folder = user->get_home_folder();
2 `- y' N: o: O; W+ l* z0 m  t+ p}
4 M& {! O7 f0 w) t) r4 Xcatch(std::bad_cast&){}
3 ~% z6 t& v7 p3 V/ b3 w

! E( m+ W1 @! b3 关于NULL 赋值
) `8 C8 j* }0 ^6 n8 c
o Old way
& T3 W, @# m/ b" _0 v* d1 R' W0 e// Declare the variables
1 l- e; v' e/ [# ULoginResponse response;
1 ]0 g" `# O0 `' o6 K1 D7 t2 sUser * user;
// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
- c6 d/ p6 T# `6 o# Y% p/ y3 buser = response.user;
// Test that instnace against NULL
if( user == NULL)
, g( ?" U. k8 `" I3 H+ v% \, w{
...
}
else
{
// Assign NULL to the pointer
' O, O6 r- j2 K, _: r  C4 Uuser = NULL;
; I8 v; ?& r/ L3 V9 P}
1 }3 O: f4 d  S; k/ F( O8 G2 to New way
9 d, C  D' G' A: e' c* `// Declare the variables
// The service data structures do not change, only
& N! ~. n' K; U) |! t// references to ModelObjects
# O- L" n/ C  B- o% DLoginResponse response;
Teamcenter::Soa::Common::AutoPtr<User> user;
/ H7 y2 U5 Z4 t8 n7 n6 x// Call a service that returns a ModelObject (User)
response = sessionService->login(name,pass, “”,””, descrim );
4 N' ^8 q: A  _user = response.user;
// Since we are not dealing directly with pointers,
9 |6 y3 ]  O1 k# r4 _3 M4 A// NULL does not make sense here, use the isNull method from the
// AutoPtr template class.
if( user.isNull())
: w; A8 u3 P# ^$ c  b: F8 u8 e{
" I5 l9 D: _* h" f8 t...
}
else
7 W. W/ n% G' i( v{
// Release the instance and
user.release();
}
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