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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" B f. v6 R, m8 i6 a! m: t' b; ?
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$ ~- N; w1 ~$ C. ~1 变量声明! g, R6 {& l4 P' { L: ~
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o Old way" d: Y" k& k% _& H: k: c# X
// Declare pointers for an Item, Form and vector of ModelObjects
. y6 X0 i" h' o& O& {// initialize to NULL4 l2 P9 y3 U/ n+ Z
Item *theItem = NULL;
" q( k! ?6 D* DForm *theForm = NULL;' m" j% A, `, ^
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();! T' m" k+ i5 j/ ~0 u
objects = theItem->get_revision_list();
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; }6 d; `/ {& T# u/ e5 T, E// Declare AutoPtr for an Item, Form and vector of ModelObjects1 e- H6 b: v( b) |( ~
// all AutoPtrs are instantiated as NULL
4 W6 z6 ^3 Y" ?/ q+ rTeamcenter::Soa::Common::AutoPtr<Item> theItem;- k- Q# K" I" K; B+ U; M7 j9 A9 L& g
Teamcenter::Soa::Common::AutoPtr<Form> theForm;* z1 o6 R( x$ a r+ _
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();3 L! D' a, D7 R5 Y' ^* C
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! L* x& B; r4 v% p e8 L$ i7 @% j2 类型转换 , l8 s8 J8 c' n7 m) @3 Y
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o Old way
6 r1 r& z7 }/ B& j& Z8 z8 b1 \% @// Declare the variables# t i) {# z, U
User *user;% N5 r. p( S7 o& O; a8 C% e, M
ModelObject *anObj;
6 T3 i$ T0 P( ]7 d% Y! u7 z8 d2 nFolder *folder;, c# ` _! K( K' L" o" Y" e
user = sessionService->login(name,pass, “”,””, descrim ).user;
! j3 ?$ `" F) r0 J5 Y// Cast to the base ModelObject class- p7 ^, e1 u* m
anObj = (ModelObject*)user;4 Q& q+ h$ T$ i: f* g' z
// Cast to a speicfic sub-type, if not NULL' t1 w: z5 r+ b0 q& M# t
// do something with the new pointer
% x6 b2 T+ M& [ d, R. A7 Wuser = dynamic_cast<User*>(anObj);1 C8 p. `1 f0 g% N
if(user != NULL)& A. R" V+ j3 H% C3 G& |: d
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folder = user->get_home_folder();# J; ~: i) R: ?2 D; y
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o New way* A1 x% w3 v6 r
// Declare the variables" p% M, I1 V# }
Teamcenter::Soa::Common::AutoPtr<User> user;$ ~* w6 m+ S& y& h9 T; T
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;5 v' ~7 X n2 k& R1 m+ F* x# x
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
. s" t# s3 T% b( |user = sessionService->login(name,pass, “”,””, descrim ).user;- m6 \# g% s/ N" Q# p1 L, H- K
// Cast to the base ModelObject class. {5 }$ }) P9 f
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 successful9 w8 ?( {8 A1 `+ O+ y- c
try" F3 R Z: e" \* f) u1 [
{
$ B5 d- V% d0 Juser = anObj.dyn_cast< User >();' \" e; z" E' l- X. D
folder = user->get_home_folder();
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4 M& {! O7 f0 w) t) r4 Xcatch(std::bad_cast&){}
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! E( m+ W1 @! b3 关于NULL 赋值
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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;: D4 E; Z( \% u0 e# N5 l
// Call a service that returns a ModelObject (User)8 |3 {) M9 j( w! ? g
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
- c6 d/ p6 T# `6 o# Y% p/ y3 buser = response.user;; h* H- Z! U. O. ^
// Test that instnace against NULL/ E2 {. [4 T+ r0 b4 p7 r
if( user == NULL)
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// Assign NULL to the pointer
' O, O6 r- j2 K, _: r C4 Uuser = NULL;
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9 d, C D' G' A: e' c* `// Declare the variables: ?, o: n( I4 @6 k) f
// The service data structures do not change, only
& N! ~. n' K; U) |! t// references to ModelObjects
# O- L" n/ C B- o% DLoginResponse response;& {3 Z' A: D( t
Teamcenter::Soa::Common::AutoPtr<User> user;
/ H7 y2 U5 Z4 t8 n7 n6 x// Call a service that returns a ModelObject (User)! Q; H+ o% {) f, p. R7 [9 t
response = sessionService->login(name,pass, “”,””, descrim );
4 N' ^8 q: A _user = response.user;0 u9 }1 O5 a1 p4 v
// 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, p. _& p7 c, s& c' K# L% w" o2 X
// AutoPtr template class. ~4 ~: U) D& c6 @, a6 U8 Y
if( user.isNull())
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else
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// Release the instance and, O( z. u& B9 ?" p1 y( D" l
user.release();% `& |2 O" U( j9 c3 q* O$ `
}
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