static bool _Evaluate(
const WQLOperand& lhs,
const WQLOperand& rhs,
WQLOperation op)
{
switch (lhs.getType())
{
case WQLOperand::NULL_VALUE:
{
// return true if the op is WQL_EQ and the rhs is NULL
// also if op is WQL_NE and rhs is not NULL
return !(op == WQL_EQ) ^ (rhs.getType() == WQLOperand::NULL_VALUE);
break;
}
case WQLOperand::INTEGER_VALUE:
{
return _Compare(
lhs.getIntegerValue(),
rhs.getIntegerValue(),
op);
}
case WQLOperand::DOUBLE_VALUE:
{
return _Compare(
lhs.getDoubleValue(),
rhs.getDoubleValue(),
op);
}
case WQLOperand::BOOLEAN_VALUE:
{
return _Compare(
lhs.getBooleanValue(),
rhs.getBooleanValue(),
op);
}
case WQLOperand::STRING_VALUE:
{
return _Compare(
lhs.getStringValue(),
rhs.getStringValue(),
op);
}
default:
OW_ASSERT(0);
}
return false;
}
static bool operator==(const WQLOperand& x, const WQLOperand& y)
{
if( x.getType()==y.getType() )
{
switch( x.getType() )
{
case WQLOperand::PROPERTY_NAME:
return x.getPropertyName()==y.getPropertyName();
case WQLOperand::INTEGER_VALUE:
return x.getIntegerValue()==y.getIntegerValue();
case WQLOperand::DOUBLE_VALUE:
return x.getDoubleValue()==y.getDoubleValue();
case WQLOperand::BOOLEAN_VALUE:
return x.getBooleanValue()==y.getBooleanValue();
case WQLOperand::STRING_VALUE:
return x.getStringValue()==y.getStringValue();
case WQLOperand::NULL_VALUE:
return true;
}
}
return false;
}
String WQL2String(const WQLOperand &o)
{
switch( o.getType() )
{
case WQLOperand::PROPERTY_NAME:
return o.getPropertyName();
case WQLOperand::STRING_VALUE:
return o.getStringValue();
case WQLOperand::INTEGER_VALUE:
return Formatter::format("$0",o.getIntegerValue());
case WQLOperand::DOUBLE_VALUE:
return Formatter::format("$0",o.getDoubleValue());
case WQLOperand::BOOLEAN_VALUE:
return Formatter::format("$0",o.getBooleanValue());
default: ;
}
return "NULL_VALUE";
}
static Boolean _Evaluate(
const WQLOperand& lhs,
const WQLOperand& rhs,
WQLOperation op)
{
switch (lhs.getType())
{
case WQLOperand::NULL_VALUE:
{
#ifdef PEGASUS_SNIA_EXTENSIONS
return (rhs.getType() == WQLOperand::NULL_VALUE);
#else
// This cannot happen since expressions of the form
// OPERAND OPERATOR NULL are converted to unary form.
// For example: "count IS NULL" is treated as a unary
// operation in which IS_NULL is the unary operation
// and count is the the unary operand.
PEGASUS_ASSERT(0);
break;
#endif
}
case WQLOperand::INTEGER_VALUE:
{
return _Compare(
lhs.getIntegerValue(),
rhs.getIntegerValue(),
op);
}
case WQLOperand::DOUBLE_VALUE:
{
return _Compare(
lhs.getDoubleValue(),
rhs.getDoubleValue(),
op);
}
case WQLOperand::BOOLEAN_VALUE:
{
return _Compare(
lhs.getBooleanValue(),
rhs.getBooleanValue(),
op);
}
case WQLOperand::STRING_VALUE:
{
if(op != WQL_LIKE) {
return _Compare(
lhs.getStringValue(),
rhs.getStringValue(),
op);
}
else {
CString lhsstr = lhs.getStringValue().getCString();
CString rhsstr = rhs.getStringValue().getCString();
const char* lhscs = (const char *)lhsstr;
const char* rhscs = (const char *)rhsstr;
return _LikeEvaluate((const char *)lhsstr, (const char *)rhsstr);
}
}
default:
PEGASUS_ASSERT(0);
}
return false;
}
