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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1 变量声明

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o Old way
% N9 s$ q* Q& Q5 T$ @// Declare pointers for an Item, Form and vector of ModelObjects
6 ]! ]' l" T/ n# s. D8 ]0 e// initialize to NULL
4 w! @! s) v4 C8 @' N) wItem *theItem = NULL;
Form *theForm = NULL;
vector< ModelObject *> objects;
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// Use the Item
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();
o New way
// Declare AutoPtr for an Item, Form and vector of ModelObjects
// all AutoPtrs are instantiated as NULL
Teamcenter::Soa::Common::AutoPtr<Item> theItem;
/ r% S3 R( y4 S) z; T+ m9 GTeamcenter::Soa::Common::AutoPtr<Form> theForm;
vector< Teamcenter::Soa::Common::AutoPtr <ModelObject> > objects;
// Use of the ModelObject variables remains unchanged
theForm = theItem->get_item_master_tag();
objects = theItem->get_revision_list();


2 类型转换

/ I1 ]4 k0 p5 Y. t* e; r$ Ro Old way
# m* s5 R4 _% n5 C' y0 W// Declare the variables
$ p9 u9 V/ j  P. i# i' }; JUser *user;
ModelObject *anObj;
Folder *folder;
user = sessionService->login(name,pass, “”,””, descrim ).user;
! j9 E/ N0 c8 I0 s// Cast to the base ModelObject class
' T, o- s! y. \% v8 janObj = (ModelObject*)user;
$ k) Y# \2 _0 ^0 P7 P( T// Cast to a speicfic sub-type, if not NULL
// do something with the new pointer
user = dynamic_cast<User*>(anObj);
# W, U& G1 @3 U4 z! s( |6 dif(user != NULL)
" q: @5 j* J3 F7 ^. B7 V( v( V{
8 `) ^( Q9 v) c( z# S! ^folder = user->get_home_folder();
}
5 }9 B2 Z. f5 y, W$ l( G( G3 F! ^o New way
( J/ ^) \0 Q! ]/ F// Declare the variables
: i, X) i/ b. c/ U* mTeamcenter::Soa::Common::AutoPtr<User> user;
Teamcenter::Soa::Common::AutoPtr<ModelObject> anObj;
Teamcenter::Soa::Common::AutoPtr<Folder> folder;
" l. p8 C! U" \5 I3 F5 y" j  i( K5 luser = sessionService->login(name,pass, “”,””, descrim ).user;
// Cast to the base ModelObject class
anObj = user.cast<ModelObject>();
// Put the cast to a speicfic sub-type, in a try/caTCh block
// if std::bad_cast not thrown, then cast was successful
try
{
! }" u# l3 [9 H, l0 suser = anObj.dyn_cast< User >();
folder = user->get_home_folder();
}
catch(std::bad_cast&){}

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3 关于NULL 赋值

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// Declare the variables
" n; c3 o2 i! qLoginResponse response;
User * user;
$ B; [# P( s$ r// Call a service that returns a ModelObject (User)
1-28 Services Guide PLM00076 Jresponse = sessionService->login(name,pass, “”,””, descrim );
4 o" B3 W6 A1 a' ^/ W3 g% Y0 S2 yuser = response.user;
4 G* h4 h3 |  Y; |// Test that instnace against NULL
if( user == NULL)
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...
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else
1 E+ B- B8 q! v+ U5 Z{
( [: t5 [. Q* _// Assign NULL to the pointer
# o# J) D) J* G) U& |user = NULL;
}
2 H% x# o) P: t) C7 Fo New way
8 g" b. V* |4 U/ a% W' J: u* \; l// Declare the variables
7 S+ J5 |& ]% f9 x// The service data structures do not change, only
// references to ModelObjects
# M7 k! W! b0 R& ?7 gLoginResponse response;
& V$ E8 a' s; X4 @5 JTeamcenter::Soa::Common::AutoPtr<User> user;
// Call a service that returns a ModelObject (User)
; @$ u$ q/ p  {' |response = sessionService->login(name,pass, “”,””, descrim );
6 N2 c  u  J8 c. v9 ^% w5 ]$ ?user = response.user;
// Since we are not dealing directly with pointers,
// NULL does not make sense here, use the isNull method from the
// AutoPtr template class.
. W/ H8 b/ ~. z  Gif( user.isNull())
{
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}
else
% O' u5 [$ k! I! F2 U$ z9 B: V{
// Release the instance and
user.release();
}

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