SAS/AF Software: Class Dictionary

Using the SAS Logical Class

When you instantiate a SAS Logical object, only the object identifier is created. You then add information about a SAS data file or data view to the object. This step is referred to as initializing the object. To initialize a SAS Logical object, use the _getMembers or _loadMembers method. This example creates a SAS Logical object, LOGOBJ, and initializes it to any currently defined librefs and filerefs except the SASHELP and SASUSER librefs:

logclass=loadclass
         ('sashelp.fsp.logical.class');
logobj=instance(logclass);
memberlist=makelist();
call send(logobj, '_get_members_', memberlist,
          "name='^sashelp ^sasuser'");

If you list the contents of MEMBERLIST, you see

( ( NAME='WORK'
    ENGINE='V611'
    PATH='pathname/saswork'
    TYPE='LIBRARY'
    SERVER=''
    DATA_REP=''
   )[2697]
  ( NAME='LIB'
    ENGINE='V611'
    PATH='/u/sasjmp'
    TYPE='LIBRARY'
    SERVER=''
    DATA_REP=''
   )[2699]
  ( NAME='EX'
    ENGINE='V611'
    PATH='pathname'
    TYPE='LIBRARY'
    SERVER=''
    DATA_REP=''
   )[2701]
  ( NAME='MAPS'
    ENGINE='V611'
    PATH='(pathname pathname)'
    TYPE='LIBRARY'
    SERVER=''
    DATA_REP=''
   )[2703]
  ( NAME='EFILE'
    ENGINE=' '
    PATH='pathname/external-file'
    TYPE='UNKNOWN_FILE'
    SERVER=''
    DATA_REP=''
   )[2705]
 )[2653]

When _getMembers was called for LOGOBJ, the librefs, WORK, LIB, EX, and MAPS, were allocated. In addition, the fileref, EFILE, was allocated.

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