int
TAO_Log_Constraint_Visitor::visit_component (
ETCL_Component *component)
{
// If this component has no sub-component, only an identifier,
// then we just visit the identifier, which puts a literal on
// the queue to be handled upon returning from this method call.
// If there is a sub-component, we store the literal's value
// in our member _var for possible examination at a more
// nested level, and visit the sub-component.
ETCL_Constraint *nested = component->component ();
int result = component->identifier ()->accept (this);
if (nested == 0 || result != 0)
{
return result;
}
else
{
TAO_ETCL_Literal_Constraint id;
this->queue_.dequeue_head (id);
CORBA::Any *any_ptr = 0;
ACE_NEW_RETURN (any_ptr,
CORBA::Any,
-1);
any_ptr->replace (id);
any_ptr->impl ()->_add_ref ();
this->current_member_ = any_ptr;
return nested->accept (this);
}
}
int
TAO_Log_Constraint_Visitor::visit_twiddle (
ETCL_Binary_Expr *binary)
{
int return_value = -1;
ETCL_Constraint *lhs = binary->lhs ();
// Determine if the left operand is a substring of the right.
if (lhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint left;
this->queue_.dequeue_head (left);
ETCL_Constraint *rhs = binary->rhs ();
if (rhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint right;
this->queue_.dequeue_head (right);
CORBA::Boolean result =
(ACE_OS::strstr ((const char *) left,
(const char *) right) != 0);
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
return_value = 0;
}
}
return return_value;
}
int
TAO_Log_Constraint_Visitor::visit_default (ETCL_Default *def)
{
ETCL_Constraint *comp = def->component ();
if (comp == 0)
{
return -1;
}
if (comp->accept (this) != 0)
{
return -1;
}
try
{
CORBA::TypeCode_var tc = this->current_member_->type ();
// If the current member is not a union, this call will
// throw BadKind and the catch block will return -1.
CORBA::Long default_index = tc->default_index ();
// No default index.
if (default_index == -1)
{
TAO_ETCL_Literal_Constraint result (false);
this->queue_.enqueue_head (result);
return 0;
}
// Okay, there's a default index, but is it active?
TAO_ETCL_Literal_Constraint disc_value;
this->queue_.dequeue_head (disc_value);
TAO_ETCL_Literal_Constraint default_index_value (default_index);
return (disc_value == default_index_value);
}
catch (const CORBA::Exception&)
{
return -1;
}
}
int
TAO_Log_Constraint_Visitor::visit_component_assoc (
ETCL_Component_Assoc *assoc)
{
// @@@ (JP) The spec reserves this type of constraint for NVLists.
// Since NVLists don't have type codes or Any operators, there's
// no way that TAO can put one into the event's filterable data.
// However, from the looks of the ETCL grammar, I believe that a
// contruct like 'exist $(foo)' is legal, and is in effect using
// the event's filterable data as one big NVList. It is
// equivalent to '$.foo'. I've implemented this method on that
// basis, while keeping in mind that a clearer interpretation of
// the spec may come along someday.
CORBA::Any any;
ACE_CString key (assoc->identifier ()->value (),
0,
false);
if (this->property_lookup_.find (key, any) != 0
|| any.impl () == 0)
{
return -1;
}
ETCL_Constraint *comp = assoc->component ();
if (comp == 0)
{
TAO_ETCL_Literal_Constraint result (&any);
this->queue_.enqueue_head (result);
return 0;
}
CORBA::Any *any_ptr = 0;
ACE_NEW_RETURN (any_ptr,
CORBA::Any (any),
-1);
this->current_member_ = any_ptr;
return comp->accept (this);
}
int
TAO_Log_Constraint_Visitor::visit_and (
ETCL_Binary_Expr *binary
)
{
int return_value = -1;
CORBA::Boolean result = false;
ETCL_Constraint *lhs = binary->lhs ();
if (lhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint lhs_result;
this->queue_.dequeue_head (lhs_result);
result = (CORBA::Boolean) lhs_result;
// Short-circuiting AND.
if (result == 1)
{
ETCL_Constraint *rhs = binary->rhs ();
if (rhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint rhs_result;
this->queue_.dequeue_head (rhs_result);
result = (CORBA::Boolean) rhs_result;
return_value = 0;
}
}
else
{
return_value = 0;
}
}
if (return_value == 0)
{
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
}
return return_value;
}
int
TAO_Log_Constraint_Visitor::visit_unary_expr (
ETCL_Unary_Expr *unary_expr
)
{
ETCL_Constraint *subexpr = unary_expr->subexpr ();
if (subexpr->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint subexpr_result;
CORBA::Boolean result = false;
int op_type = unary_expr->type ();
switch (op_type)
{
case ETCL_NOT:
this->queue_.dequeue_head (subexpr_result);
result = ! (CORBA::Boolean) subexpr_result;
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
return 0;
case ETCL_MINUS:
// The leading '-' was parsed separately, so we have to pull
// the literal constraint off the queue, apply the class' own
// unary minus operator, and put it back.
this->queue_.dequeue_head (subexpr_result);
this->queue_.enqueue_head (-subexpr_result);
return 0;
case ETCL_PLUS:
// Leave the literal constraint on the queue. The leading
// '+' was just syntactic sugar - no action is necessary.
return 0;
default:
// The parser should never construct a ETCL_Unary_Constraint
// behind any operators except the above three.
return -1;
}
}
return -1;
}
int
Constraint_Visitor::visit_and (ETCL_Binary_Expr *binary)
{
int return_value = -1;
ACE_CDR::Boolean result = false;
ETCL_Constraint *lhs = binary->lhs ();
/// Call to accept() puts the lhs (or its evaluation) on our queue.
if (lhs->accept (this) == 0)
{
ETCL_Literal_Constraint lhs_result;
this->queue_.dequeue_head (lhs_result);
result = (ACE_CDR::Boolean) lhs_result;
/// Short-circuiting AND.
if (result == true)
{
ETCL_Constraint *rhs = binary->rhs ();
if (rhs->accept (this) == 0)
{
ETCL_Literal_Constraint rhs_result;
this->queue_.dequeue_head (rhs_result);
result = (ACE_CDR::Boolean) rhs_result;
return_value = 0;
}
}
else
{
return_value = 0;
}
}
if (return_value == 0)
{
this->queue_.enqueue_head (ETCL_Literal_Constraint (result));
}
return return_value;
}
int
TAO_Log_Constraint_Visitor::visit_exist (ETCL_Exist *exist)
{
ETCL_Constraint *component = exist->component ();
if (component->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint top;
this->queue_.dequeue_head (top);
const char *value = (const char *) top;
ACE_CString key (value, 0, false);
CORBA::Boolean result = (this->property_lookup_.find (key) == 0);
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
return 0;
}
return -1;
}
int
TAO_Log_Constraint_Visitor::visit_in (
ETCL_Binary_Expr *binary)
{
int return_value = -1;
ETCL_Constraint *lhs = binary->lhs ();
// Determine if the left operand is contained in the right.
if (lhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint left;
this->queue_.dequeue_head (left);
ETCL_Constraint *rhs = binary->rhs ();
if (rhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint bag;
this->queue_.dequeue_head (bag);
if (bag.expr_type () == ETCL_COMPONENT)
{
CORBA::Any_ptr any_ptr = 0;
ACE_NEW_RETURN (any_ptr,
CORBA::Any,
-1);
CORBA::Any_var component = any_ptr;
component->replace (bag);
component->impl ()->_add_ref ();
CORBA::TCKind kind = CORBA::tk_null;
try
{
CORBA::TypeCode_var tc = component->type ();
kind = TAO_DynAnyFactory::unalias (tc.in ());
}
catch (const CORBA::Exception&)
{
return return_value;
}
CORBA::Boolean result = 0;
switch (kind)
{
case CORBA::tk_sequence:
result = this->sequence_does_contain (&component.in (),
left);
break;
case CORBA::tk_array:
result = this->array_does_contain (&component.in (),
left);
break;
case CORBA::tk_struct:
result = this->struct_does_contain (&component.in (),
left);
break;
case CORBA::tk_union:
result = this->union_does_contain (&component.in (),
left);
break;
case CORBA::tk_any:
result = this->any_does_contain (&component.in (),
left);
break;
default:
return return_value;
}
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
return_value = 0;
}
}
}
return return_value;
}
int
TAO_Log_Constraint_Visitor::visit_binary_op (
ETCL_Binary_Expr *binary,
int op_type)
{
int return_value = -1;
ETCL_Constraint *lhs = binary->lhs ();
CORBA::Boolean result = false;
// Evaluate the constraint
// Perform an operation on the results of evaluating the left and
// right branches of this subtree.
if (lhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint left_operand;
this->queue_.dequeue_head (left_operand);
ETCL_Constraint *rhs = binary->rhs ();
if (rhs->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint right_operand;
this->queue_.dequeue_head (right_operand);
return_value = 0;
switch (op_type)
{
case ETCL_LT:
result = left_operand < right_operand;
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
break;
case ETCL_LE:
result = left_operand <= right_operand;
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
break;
case ETCL_GT:
result = left_operand > right_operand;
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
break;
case ETCL_GE:
result = left_operand >= right_operand;
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
break;
case ETCL_EQ:
result = left_operand == right_operand;
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
break;
case ETCL_NE:
result = left_operand != right_operand;
this->queue_.enqueue_head (TAO_ETCL_Literal_Constraint (result));
break;
case ETCL_PLUS:
this->queue_.enqueue_head (left_operand + right_operand);
break;
case ETCL_MINUS:
this->queue_.enqueue_head (left_operand - right_operand);
break;
case ETCL_MULT:
this->queue_.enqueue_head (left_operand * right_operand);
break;
case ETCL_DIV:
this->queue_.enqueue_head (left_operand / right_operand);
break;
default:
return_value = -1;
}
}
}
return return_value;
}
int
TAO_Log_Constraint_Visitor::visit_component_array (
ETCL_Component_Array *array)
{
try
{
// If we are here (from visit_component) the Any containing the
// component as found in property_lookup_ will be in current_member_.
CORBA::TypeCode_var tc = this->current_member_->type ();
CORBA::TCKind kind = TAO_DynAnyFactory::unalias (tc.in ());
DynamicAny::DynAny_var member;
CORBA::Boolean success = 0;
CORBA::ULong slot = (CORBA::ULong) *array->integer ();
switch (kind)
{
case CORBA::tk_array:
{
TAO_DynEnum_i dyn_array;
dyn_array.init (this->current_member_.in ());
success = dyn_array.seek (slot);
if (success == 0)
{
return -1;
}
member = dyn_array.current_component ();
break;
}
case CORBA::tk_sequence:
{
TAO_DynStruct_i dyn_sequence;
dyn_sequence.init (this->current_member_.in ());
success = dyn_sequence.seek (slot);
if (success == 0)
{
return -1;
}
member =
dyn_sequence.current_component ();
break;
}
// Enums and sequences are the only two cases handled
// by Component_Array.
default:
return -1;
}
CORBA::Any_var value = member->to_any ();
ETCL_Constraint *comp = array->component ();
if (comp == 0)
{
TAO_ETCL_Literal_Constraint result (value.ptr ());
this->queue_.enqueue_head (result);
return 0;
}
else
{
this->current_member_ = value._retn ();
return comp->accept (this);
}
}
catch (const CORBA::Exception&)
{
return -1;
}
}
int
TAO_Log_Constraint_Visitor::visit_union_pos (
ETCL_Union_Pos *union_pos)
{
try
{
if (union_pos->union_value ()->accept (this) == 0)
{
TAO_ETCL_Literal_Constraint disc_val;
this->queue_.dequeue_head (disc_val);
TAO_DynUnion_i dyn_union;
dyn_union.init (this->current_member_.in ());
CORBA::TypeCode_var tc = this->current_member_->type ();
switch (disc_val.expr_type ())
{
case ETCL_INTEGER:
case ETCL_SIGNED:
case ETCL_UNSIGNED:
{
CORBA::Any disc_any;
CORBA::TypeCode_var disc_tc =
tc->discriminator_type ();
CORBA::TCKind disc_kind =
TAO_DynAnyFactory::unalias (disc_tc.in ());
switch (disc_kind)
{
case CORBA::tk_boolean:
disc_any <<= CORBA::Any::from_boolean ((CORBA::Boolean) disc_val);
break;
case CORBA::tk_short:
disc_any <<= (CORBA::Short) ((CORBA::Long) disc_val);
break;
case CORBA::tk_ushort:
disc_any <<= (CORBA::UShort) ((CORBA::ULong) disc_val);
break;
case CORBA::tk_long:
disc_any <<= (CORBA::Long) disc_val;
break;
case CORBA::tk_ulong:
disc_any <<= (CORBA::ULong) disc_val;
break;
case CORBA::tk_enum:
{
TAO_OutputCDR cdr;
cdr.write_ulong ((CORBA::ULong) disc_val);
TAO_InputCDR in_cdr (cdr);
TAO::Unknown_IDL_Type *unk = 0;
ACE_NEW_RETURN (unk,
TAO::Unknown_IDL_Type (disc_tc.in (),
in_cdr),
-1);
disc_any.replace (unk);
break;
}
// @@@ (JP) I don't think ETCL handles 64-bit
// integers at this point, and I also think that
// chars and/or wchars will just come out in the
// constraint as (w)strings of length 1.
case CORBA::tk_longlong:
case CORBA::tk_ulonglong:
case CORBA::tk_char:
case CORBA::tk_wchar:
default:
return -1;
}
DynamicAny::DynAny_var dyn_any =
TAO::MakeDynAnyUtils::make_dyn_any_t<const CORBA::Any &> (
disc_tc.in (),
disc_any);
dyn_union.set_discriminator (dyn_any.in ());
DynamicAny::DynAny_var u_member =
dyn_union.member ();
this->current_member_ =
u_member->to_any ();
break;
}
case ETCL_STRING:
{
const char *name = (const char *) disc_val;
CORBA::ULong count =
tc->member_count ();
const char *member_name = 0;
CORBA::ULong i = 0;
for (i = 0; i < count; ++i)
{
member_name = tc->member_name (i);
if (ACE_OS::strcmp (name, member_name) == 0)
{
break;
}
}
// If there's no match, member_label will throw
// CORBA::TypeCode::Bounds and the catch block will
// return -1;
this->current_member_ = tc->member_label (i);
break;
}
// The TAO_ETCL_Union_Value that was put on the queue
// shouldn't have any other type.
default:
return -1;
}
ETCL_Constraint *nested = union_pos->component ();
// If there's no nested component, then we just want the
// union member value on the queue. Otherwise, we want
// the member value in current_member_ while we visit
// the nested component.
if (nested == 0)
{
TAO_ETCL_Literal_Constraint lit (this->current_member_.ptr ());
this->queue_.enqueue_head (lit);
return 0;
}
else
{
return nested->accept (this);
}
}
else
{
return -1;
}
}
catch (const CORBA::Exception&)
{
return -1;
}
}