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
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o Old way
$ j% I& m2 i! O0 I% g8 t1 f// Declare pointers for an Item, Form and vector of ModelObjects
% ^4 c9 x8 B6 k// initialize to NULL
, i$ x7 m0 Y/ @7 M) ~, KItem *theItem = NULL;
. j8 Z4 p% M( E6 b+ F& SForm *theForm = NULL;
vector< ModelObject *> objects;
...
// Use the Item
' t5 D% O/ p- S+ [/ otheForm = theItem->get_item_master_tag();
8 f+ D& L+ t, I; Nobjects = theItem->get_revision_list();
3 {# Z+ t2 {' l7 }! _' Z; uo New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
4 R5 ^" r& t; U" `: }// all AutoPtrs are instantiated as NULL
5 m$ U7 T& r$ K: QTeamcenter::Soa::Common::AutoPtr<Item> theItem;
Teamcenter::Soa::Common::AutoPtr<Form> theForm;
: p% S* n* E! v. m6 ~' qvector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
& ~3 q7 p+ x7 p$ N$ c/ X3 Z$ R. m1 wtheForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();

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2 类型转换
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o Old way
% P. T5 H* Q8 V( Q// Declare the variables
User *user;
$ u/ I- [$ S7 E: }0 A% wModelObject *anObj;
# |2 h0 {) Q) K* hFolder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
" U) ^" e1 G+ L' B/ z8 S! d. v3 W. M// Cast to the base ModelObject class
anObj = (ModelObject*)user;
// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
user = dynamic_cast<User*>(anObj);
/ Y* W, v& K+ w; ]if(user != NULL)
{
folder = user->get_home_folder();
: p8 w) C. M- ?, y" j}
* A! R" d( Q2 _  N1 A2 Ao New way
( `2 ?0 a; g  c" `7 C% ~, [' J( E// Declare the variables
Teamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
6 c/ `- f( U- pTeamcenter::Soa::Common::AutoPtr<Folder> folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
. P  w! M. |( l- f/ m// Cast to the base ModelObject class
4 @: V! n* e6 ?  V; eanObj = user.cast<ModelObject>();
& n2 e; t, e* H8 [, e- ~" G$ R" ]; t// Put the cast to a speicfic sub-type, in a try/caTCh block
1 u0 O# }1 Z  @- f* d! S// if std::bad_cast not thrown, then cast was successful
# x  ], q0 w( k! ?. f3 I1 p$ mtry
8 E; d, f& T5 e5 A( U7 `& ~# J{
user = anObj.dyn_cast< User >();
folder = user->get_home_folder();
}
catch(std::bad_cast&){}


3 关于NULL 赋值

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// Declare the variables
LoginResponse response;
/ D. E1 v1 j( t. F6 J! ?- cUser * user;
// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
6 A$ B* u0 ^3 g6 `7 d' F, m8 o: kuser = response.user;
  `. X5 Z! H+ e// Test that instnace against NULL
8 N# O5 v# g3 \if( user == NULL)
4 a$ s" a; w8 U4 D6 V. ]/ p- e{
...
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else
{
// Assign NULL to the pointer
5 S/ ~  s2 l& M# t  C# i0 P+ fuser = NULL;
}
7 }' u# d! m# M2 g  H9 ?9 m$ xo New way
// Declare the variables
// The service data structures do not change, only
, j; F. J  e- p& T$ g) K8 x// references to ModelObjects
7 b) d$ O9 x" O9 R8 }& c+ sLoginResponse response;
6 K) S6 d" _3 P4 h- O0 yTeamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
response = sessionService->login(name,pass, “”,””, descrim );
0 P& O9 n8 W) z7 Ouser = response.user;
) c, d/ n( v9 z6 K; _// Since we are not dealing directly with pointers,
1 {: G. J% \, i* u( `+ D6 G// NULL does not make sense here, use the isNull method from the
// AutoPtr template class.
! U1 f1 A2 N& Z4 `if( user.isNull())
{
...
, r* b+ J; I; l; ]- a7 ]}
else
6 p# g# @5 ]* r0 G& t$ A- C, N) T{
// Release the instance and
user.release();
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