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Calling C++ Custom Commands from Scripting

When a C++ custom command returns an array, the value received by the caller depends on the scripting language, and whether a CValueArray or a CRefArray is returned. For example, if a command returns a CValueArray, then a JScript caller gets a safe array, but if a command returns a CRefArray, then a JScript caller gets an XSICollection.

JScript Example: Calling a C++ command that returns an array

//
// GetValueArray() is a C++ custom command that returns a CValueArray
//

var aSafeArray = GetValueArray();

var aVBArray = new VBArray( aSafeArray );
logmessage( typeof( aVBArray ) );
logmessage( aVBArray.dimensions() );

// Access the VBArray directly
for (var i=0; i <= aVBArray.ubound(1); i++)
{
   Application.LogMessage( aVBArray.getItem(i).fullname );
}

// Convert the VBArray to a JScript array
var aJSarray = aVBArray.toArray();
for (e=new Enumerator(aJSarray);!e.atEnd();e.moveNext())
{
   var o = e.item();
   logmessage( o.fullname );
}

//
// GetRefArray() is a C++ custom command that returns a CRefArray
//

var objects = GetRefArray();
logmessage( objects.type ); //INFO : XSICollection
for (e=new Enumerator(objects);!e.atEnd();e.moveNext())
{
   var o = e.item();
   Application.LogMessage( o.fullname );
}

Python Example: Calling a C++ command that returns an array

#
# GetValueArray is a C++ custom command that returns a CValueArray
#

objects = Application.GetValueArray()

Application.Logmessage( unicode(type(objects)) ) #INFO : <type 'tuple'>

for o in objects:
   Application.LogMessage( o.name )
   Application.Logmessage( unicode(type(o)) ) #INFO : <type 'instance'>
   Application.LogMessage( Application.classname(o) )

#
# GetRefArray is a C++ custom command that returns a CRefArray
#

objects = Application.GetRefArray()

Application.Logmessage( unicode(type(objects)) ) #INFO : <type 'instance'>
Application.Logmessage( objects.type ) # XSICollection

for o in objects:
   Application.LogMessage(o.name)

for i in range(objects.Count):
   Application.LogMessage(objects(i).FullName)

VBScript Example: Calling a C++ command that returns an array

'
' GetValueArray() returns a CValueArray
'
set objects = GetValueArray()

logmessage( typename( objects ) ) 'INFO : Object
logmessage( objects.type ) 'INFO : XSICollection

for each o in objects
   logmessage o.name
next

'
' GetRefArray() returns a CRefArray
'

set objects = GetRefArray()

logmessage typename( objects ) 'INFO : Object
logmessage( objects.type ) 'INFO : XSICollection

for each o in objects
   logmessage o.name
next

PerlScript Example: Calling a C++ command that returns an array

#
# GetRefArray() returns a CRefArray
#

# scalar context
my $objects = GetRefArray();
$Application->LogMessage( $objects->Type ); #INFO : XSICollection

for $i (0..$objects->Count-1) {
   $o = $objects->Item($i);
   $Application->LogMessage( $o->IsKindOf("polymsh") );
   $Application->LogMessage( $o->{'FullName'} );
}


# list context
my @objects = GetRefArray();
$Application->logmessage( $objects[0]->Type ); #INFO : XSICollection

for $i (0..$objects[0]->Count-1) {
   $o = $objects[0]->Item($i);
   $Application->LogMessage( $o->IsKindOf("polymsh") );
   $Application->LogMessage( $o->{'FullName'} );
}

#
# Test() returns a CValueArray
#

# list context
my @test = Test();

$Application->LogMessage( ref( $test[0] ) ); #INFO : ARRAY

for $o (@{$test[0]}) {
   $Application->LogMessage( $o->FullName );
}


# scalar context
my $test = Test();

$Application->LogMessage( ref( $test ) ); #INFO : ARRAY

for $o (@{$test}) {
   $Application->LogMessage( ref( $o ) ); #INFO : Win32::OLE
   $Application->LogMessage( $o->FullName );
}

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