internal gsWhereClause GetWhereClause(BooleanExpression searchCondition)
{
gsWhereClause whereClause = new gsWhereClause();
GetWhereClause(searchCondition, whereClause);
return(whereClause);
}
internal void GetWhereClause(BooleanExpression searchCondition, gsWhereClause whereClause)
{
if (searchCondition is BooleanComparisonExpression)
{
gsWhereTermBase whereTerm = GetWhereTerm(searchCondition as BooleanComparisonExpression);
whereClause.Terms.Add(whereTerm);
}
else if (searchCondition is BooleanParenthesisExpression)
{
var booleanParenthesisExpression = searchCondition as BooleanParenthesisExpression;
gsWhereClause subClause = GetWhereClause(booleanParenthesisExpression.Expression);
whereClause.SubClauses.Add(subClause);
}
else if (searchCondition is BooleanIsNullExpression)
{
gsWhereTermBase whereTerm = GetWhereTerm(searchCondition as BooleanIsNullExpression);
whereClause.Terms.Add(whereTerm);
}
else if (searchCondition is BooleanBinaryExpression)
{
var booleanBinaryExpression = searchCondition as BooleanBinaryExpression;
whereClause.Relationship = booleanBinaryExpression.BinaryExpressionType == BooleanBinaryExpressionType.And ? gsWhereClauseRelationship.And : gsWhereClauseRelationship.Or;
if (booleanBinaryExpression.FirstExpression.IsBinaryExpression())
{
gsWhereClause subClause = new gsWhereClause();
whereClause.SubClauses.Add(subClause);
GetWhereClause(booleanBinaryExpression.FirstExpression, subClause);
}
else
{
GetWhereClause(booleanBinaryExpression.FirstExpression, whereClause);
}
if (booleanBinaryExpression.SecondExpression.IsBinaryExpression())
{
gsWhereClause subClause = new gsWhereClause();
whereClause.SubClauses.Add(subClause);
GetWhereClause(booleanBinaryExpression.SecondExpression, subClause);
}
else
{
GetWhereClause(booleanBinaryExpression.SecondExpression, whereClause);
}
}
else if (searchCondition is LikePredicate)
{
gsWhereTermBase whereTerm = GetWhereTerm(searchCondition as LikePredicate);
whereClause.Terms.Add(whereTerm);
}
else if (searchCondition is ExistsPredicate)
{
gsWhereTermBase whereTerm = GetWhereTerm(searchCondition as ExistsPredicate, gsExistsOrNotExists.Exists);
whereClause.Terms.Add(whereTerm);
}
else if (searchCondition is BooleanNotExpression)
{
if ((searchCondition as BooleanNotExpression).Expression is ExistsPredicate)
{
gsWhereTermBase whereTerm = GetWhereTerm((searchCondition as BooleanNotExpression).Expression as ExistsPredicate, gsExistsOrNotExists.NotExists);
whereClause.Terms.Add(whereTerm);
}
else
{
throw new NotImplementedException($"BooleanNotExpression of type {(searchCondition as BooleanNotExpression).Expression.GetType().Name} not supported");
}
}
else if (searchCondition is InPredicate)
{
gsWhereTermBase whereTerm = GetWhereTerm(searchCondition as InPredicate, (searchCondition as InPredicate).NotDefined);
whereClause.Terms.Add(whereTerm);
}
else
{
throw new NotImplementedException($"BooleanExpression of type {searchCondition.GetType().Name} not supported");
}
}
