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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$ w7 c3 n; q' K1 T% C
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1 变量声明
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2 U. X- j- x8 p1 b2 ~. {o Old way
8 q4 P' y3 P: U& K1 B0 f e// Declare pointers for an Item, Form and vector of ModelObjects
# j: ]$ ^: l/ U- E// initialize to NULL
4 Q6 z! }7 K: E5 \5 PItem *theItem = NULL;
) d5 F6 }- ]' M3 E6 @% H* K8 @Form *theForm = NULL;
$ X$ h2 h. d! ]$ A) u8 x$ h! \vector< ModelObject *> objects;
5 a, w" W6 U- m, _1 e1 t$ X& V4 w...
1 Y. `5 ?* c/ B// Use the Item5 f) m8 P% l0 N) l) m, p. z, ]
theForm = theItem->get_item_master_tag();
- U+ k. w; l [- Z" z4 oobjects = theItem->get_revision_list();0 H5 G% B+ u4 V" k4 ^5 e- Q/ f
o New way( O5 k3 H8 q/ |) {
// Declare AutoPtr for an Item, Form and vector of ModelObjects P; T x, T0 g: F
// all AutoPtrs are instantiated as NULL
& Z0 a. V' z" }+ P: ZTeamcenter::Soa::Common::AutoPtr<Item> theItem;7 `- ? f. k2 S9 s& m
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
6 @4 U1 E6 W/ R. S% Z. Mvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;2 a9 w2 A* T$ m
// Use of the ModelObject variables remains unchanged& [' }# [7 k# p% V0 I9 A6 I& O
theForm = theItem->get_item_master_tag();
2 [ w) p& n9 o# V4 |" d& R4 ]objects = theItem->get_revision_list();' \- E& q. {/ {; W
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2 类型转换
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o Old way$ D2 {) k8 X8 c: W% J8 U
// Declare the variables% W; w6 X- ~* y0 ]3 _3 n3 y
User *user;) G9 x0 v7 n, G0 ]
ModelObject *anObj;/ |1 d$ Z o5 a4 a& u! g+ |
Folder *folder;
+ s; w( h# ~- O- Tuser = sessionService->login(name,pass, “”,””, descrim ).user;
4 u& y* b' i" u' \4 z8 j// Cast to the base ModelObject class
! K/ T8 E( P' j: K! h- QanObj = (ModelObject*)user;
7 ] g$ |/ I, f6 x% ^// Cast to a speicfic sub-type, if not NULL& a/ e4 k- c( ]1 S, X5 t
// do something with the new pointer% P' u. E; P' E$ e/ v& W4 f9 z
user = dynamic_cast<User*>(anObj);; a4 a1 o. W$ X5 [
if(user != NULL)3 l$ Q: i0 i% U/ d) k2 X$ w
{
+ C+ Q! L& Z2 Dfolder = user->get_home_folder();
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4 n( ^2 F: @7 }( Y// Declare the variables3 Z. m# E9 c$ ~8 ^
Teamcenter::Soa::Common::AutoPtr<User> user;
/ y1 b) }! e- L1 F# H5 e. ~Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;+ {( ~! T& k; k
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
0 y2 N% O* P3 w0 A% N% v% \3 b0 Y6 |user = sessionService->login(name,pass, “”,””, descrim ).user;
% c% ?# {+ W! V* E2 G, k// Cast to the base ModelObject class
9 w6 q3 v( s- ^% lanObj = user.cast<ModelObject>();( `9 R8 A& C- _# q/ c) f! T N
// Put the cast to a speicfic sub-type, in a try/caTCh block
! \% J" N& e* e5 e// if std::bad_cast not thrown, then cast was successful- r$ B9 ~2 M& i! s3 l: ?
try
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user = anObj.dyn_cast< User >();
s- ^9 H" A# n, f/ @ k" ?4 h* |# H1 Dfolder = user->get_home_folder();
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catch(std::bad_cast&){}- P8 v4 {. V2 x; w, ]/ I8 d z; y6 C E
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4 M9 O/ U, O! z. h, l. s3 关于NULL 赋值+ E2 m& F$ K) ^8 O3 o) T- A
# t% q5 m! o3 F8 C8 O+ a2 ho Old way
& m& n9 ^+ q7 a/ u* n/ m, o2 ?// Declare the variables
! c. R8 T6 `7 J: P% e. A) l5 M& d' c0 OLoginResponse response;
/ W: c4 [: U: E. fUser * user;
& ]" g; e, y- Y6 i4 z$ B S// Call a service that returns a ModelObject (User)) b' M5 ^( q. U( Q* B) j8 Z, }
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
4 @% X/ l, p) G/ s7 I) ^" Nuser = response.user;
3 S5 E$ `/ X9 L* Y// Test that instnace against NULL' Q/ P3 L+ C* V9 L4 d m
if( user == NULL)( J* R. V2 y6 `; o2 c& s
{
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}
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{
2 d5 D' w9 N$ w" b$ } f& Z6 l// Assign NULL to the pointer1 d' b+ G! B3 \9 T9 r2 h0 a% |
user = NULL;
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# d; ]6 A G; ^5 U3 e$ L/ g2 B// Declare the variables
0 W! K8 D5 }* n1 g" k% i// The service data structures do not change, only: T0 U( F, X$ w
// references to ModelObjects5 ]' E& q8 c( q) D) ?% Y1 X. ^
LoginResponse response;+ v0 y) m8 C. Z) e: M6 h8 _
Teamcenter::Soa::Common::AutoPtr<User> user;0 l4 D) B, U6 H4 ?9 p
// Call a service that returns a ModelObject (User)/ U/ x; ?1 d5 B1 G9 Q# T
response = sessionService->login(name,pass, “”,””, descrim );1 ^1 H2 c* G* S3 K" x% q/ z
user = response.user;
9 G" O" b+ M# T H// Since we are not dealing directly with pointers,
+ B2 I' X! ~/ u6 t// NULL does not make sense here, use the isNull method from the# l4 F0 A+ i4 W! |+ Q
// AutoPtr template class.# f( j2 z7 b- t
if( user.isNull())8 Q* [! i& U6 U! y, l. ^' k6 b ~
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...
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else0 {4 p: R0 U' m5 f7 `
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// Release the instance and
+ j. l1 D! ~# {' y8 Quser.release();
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