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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3 z/ t. Z: e1 b1 变量声明
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+ R$ e0 A4 N9 [( u  N- Oo Old way
& O8 }$ k, D6 r+ M- |// Declare pointers for an Item, Form and vector of ModelObjects
// initialize to NULL
Item *theItem = NULL;
Form *theForm = NULL;
vector< ModelObject *> objects;
...
// Use the Item
9 z2 j' Q9 F7 E- L) PtheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
6 f0 J4 x& n4 E2 |- B; e// all AutoPtrs are instantiated as NULL
$ }/ r" ~- V  I; S: a3 ^- QTeamcenter::Soa::Common::AutoPtr<Item> theItem;
1 {6 g$ }) o# yTeamcenter::Soa::Common::AutoPtr<Form> theForm;
" y) C) M7 C3 Z  f+ qvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
theForm = theItem->get_item_master_tag();
* q% ^- E% Q8 k$ A' t+ r) yobjects = theItem->get_revision_list();
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2 类型转换

3 p( r: y% ~* ]9 N. A( l6 N  S( i% e7 lo Old way
// Declare the variables
: H; r0 i3 Y0 R* k7 k0 xUser *user;
7 ?2 ]1 a( |' v1 }& mModelObject *anObj;
Folder *folder;
& y3 i2 T: n. Suser = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
) E9 O2 Y/ f, zanObj = (ModelObject*)user;
9 R1 f7 G1 N: y0 `// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
user = dynamic_cast<User*>(anObj);
$ N1 D# i' _7 V$ s% v, Q8 Q5 Rif(user != NULL)
{
folder = user->get_home_folder();
/ c( ]9 s- h3 Z: _7 ~}
o New way
. \7 c) V# \, N( g( j// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
; c6 C5 N9 o7 \user = sessionService->login(name,pass, “”,””, descrim ).user;
5 {8 a. a( ?8 Z7 K  Y. c// Cast to the base ModelObject class
: P' c1 s3 \6 v: n' f4 r: L6 tanObj = user.cast<ModelObject>();
+ W4 t* e0 G3 E// Put the cast to a speicfic sub-type, in a try/caTCh block
  F4 P; s  L, N0 E3 \3 y; G5 ^// if std::bad_cast not thrown, then cast was successful
$ O2 o, p( k! ^5 G) `! |6 d! btry
( {) u. h! e8 k0 o0 P8 x{
: |! @9 S- w9 z6 K& a& H8 Luser = anObj.dyn_cast< User >();
folder = user->get_home_folder();
# l9 J1 ~3 N. n8 |$ r9 C}
+ O  j' h5 j& X8 [" C1 h* Ocatch(std::bad_cast&){}


5 r; i' J( \9 W7 z& A% k3 关于NULL 赋值
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o Old way
// Declare the variables
# w0 _6 U2 I7 G5 n4 f$ z8 v2 f0 FLoginResponse response;
. ]" p" q" u* G5 R# h. aUser * user;
// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Test that instnace against NULL
) w) m6 C9 X: ]7 O, X' a3 M. Vif( user == NULL)
# p( x0 s! ~9 \$ M' D7 W+ m{
, z" A, E; u  P8 p: T8 h1 P+ g" e/ r...
}
else
{
# ^" l+ r# l2 c/ u5 M8 M4 t// Assign NULL to the pointer
user = NULL;
}
- O* C# o2 P6 l+ u, D8 ]o New way
// Declare the variables
// The service data structures do not change, only
// references to ModelObjects
% h5 H( f) Y) M6 @1 ^& s( sLoginResponse response;
! m. a4 ^5 k6 m# uTeamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
response = sessionService->login(name,pass, “”,””, descrim );
user = response.user;
// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
$ {, Z+ M5 ^! U  o8 r8 h! a% S5 V+ `// AutoPtr template class.
1 K* D; z% R( B/ y3 }4 c3 oif( user.isNull())
{
* ^0 E7 H4 c. T- ^...
4 O. V7 C2 p8 C6 q0 r. O2 y) g}
- ?. I% I9 T( @1 d: ?6 {else
{
// Release the instance and
9 l; |& R' A1 M% x3 U  \user.release();
}
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