public int CompareTo(object obj)
{
if (obj is IsOfTypePredicate)
{
IsOfTypePredicate other = (IsOfTypePredicate)obj;
if (Inverse == other.Inverse)
{
return(typename.CompareTo(other.typename));
}
}
return(-1);
}
/// Implements <AverageFunction> ::= 'AVG(' <TypePlusAttribute> ')'
public Reduction CreateRULE_AVERAGEFUNCTION_AVGLPARAN_RPARAN(Reduction reduction)
{
Reduction typePlusAttributeReduction = (Reduction)reduction.GetToken(1).Data;
string typeName = ((Reduction)typePlusAttributeReduction.GetToken(0).Data).Tag as string;
string memberName = ((Reduction)typePlusAttributeReduction.GetToken(2).Data).Tag as string;
Predicate childPredicate = new IsOfTypePredicate(typeName);
AggregateFunctionPredicate avgFunctionPredicate = ExpressionBuilder.CreateAverageFunctionPredicate(memberName) as AggregateFunctionPredicate;
avgFunctionPredicate.ChildPredicate = childPredicate;
reduction.Tag = avgFunctionPredicate;
return null;
}
/// Implements <Query> ::= SELECT <TypeIdentifier> WHERE <Expression>
public Reduction CreateRULE_QUERY_SELECT_WHERE(Reduction reduction)
{
//selectType can be one of the following depending on the query text: -
//1. A plain string that is the name of Type; we can build IsOfTypePredicate from this.
//2. AggregateFunctionPredicate that has IsOfTypePredicate set as its ChildPredicate // cant be this, grammer changed
//3. IsOfTypePredicate
object selectType = ((Reduction)reduction.GetToken(1).Data).Tag;
Predicate lhs = null;
Predicate rhs = (Predicate)((Reduction)reduction.GetToken(3).Data).Tag;
Predicate selectTypePredicate = selectType as Predicate;
Predicate result = null;
//1. selectType is string
if (selectTypePredicate == null)
{
lhs = new IsOfTypePredicate(selectType.ToString());
result = ExpressionBuilder.CreateLogicalAndPredicate(lhs, rhs);
}
////2. selectType is AggregateFunctionPredicate
//3. selectType is IsOfTypePredicate
else
{
lhs = selectTypePredicate;
result = ExpressionBuilder.CreateLogicalAndPredicate(lhs, rhs);
}
reduction.Tag = result;
if (NCacheLog.IsInfoEnabled) NCacheLog.Info("CreateRULE_QUERY_SELECT_WHERE");
return null;
}
/// Implements <CountFunction> ::= 'COUNT(' <Property> ')'
public Reduction CreateRULE_COUNTFUNCTION_COUNTLPARAN_TIMES_RPARAN(Reduction reduction)
{
string typeName = ((Reduction)reduction.GetToken(1).Data).Tag as string;
Predicate childPredicate = new IsOfTypePredicate(typeName);
AggregateFunctionPredicate countFunctionPredicate = ExpressionBuilder.CreateCountFunctionPredicate() as AggregateFunctionPredicate;
countFunctionPredicate.ChildPredicate = childPredicate;
reduction.Tag = countFunctionPredicate;
return null;
}
