static internal void CreateSortFields(HqlValuesComparer list, ArrayList q)
{
int counter = 0;
int current = 0;
if (q == null || q.Count == 0)
{
return;
}
// every level within braces are at the same level, and each nested query gets it's own
// example:
// dim = 0 dim = 0 dim = 1 dim = 1 dim = 2 dim = 2 dim = 0 dim = 3 dim = 3
// ON a.field1 = "A" and a.field1 = "B" and (a.field1 = "C" and a.field1 = "D") and (a.field1 = "E" or a.field1 = "F") and a.field1 = "G" and (a.field1 = "H" and a.field1 = "I")");
// result of above: A, B, D, E
// see how many dim can be added
for (int dim = 0; ; dim++)
{
int countElement = 0;
int countOr = 0;
counter = 0;
current = 0;
HqlEvaluator.CountOrs(q, ref counter, dim, ref current, ref countElement, ref countOr, null);
if (countElement == 0)
{
break;
}
if (countOr == 0)
{
// Add this dim
counter = 0;
current = 0;
CountOrs(q, ref counter, dim, ref current, ref countElement, ref countOr, list);
}
else
{
// found ORs in this dim
break;
// In the above case, I am leaving out the DIM3 from the join but this is a small
// percentage case and I'm not really worried it about since if i just get DIM 0 on most queries
// that is PLENTY good joining.
}
}
}
public void CreateSortFields(HqlValuesComparer list)
{
HqlEvaluator.CreateSortFields(list, _q);
}
static internal void CountOrs(ArrayList q, ref int counter, int expectedDim, ref int currentDim, ref int countElements, ref int countOrs, HqlValuesComparer list)
{
if (counter > q.Count)
{
throw new Exception("Unexpected end of WHERE evaluation");
}
int thisDim = currentDim;
for (; ;)
{
if (counter >= q.Count)
{
break;
}
Object o = q[counter];
counter++;
if (o is HqlToken)
{
// open paren := token.Type == HqlWordType.KEYWORD && token.Keyword == HqlKeyword.OPENPAREN
// closed paren := token.Type == HqlWordType.KEYWORD && token.Keyword == HqlKeyword.CLOSEDPAREN
// and_or := token.Type == HqlWordType.KEYWORD && token.Keyword == HqlKeyword.AND_OR
//
HqlToken token = (HqlToken)o;
if (token.WordType == HqlWordType.KEYWORD && token.Keyword == HqlKeyword.OPENPAREN)
{
currentDim++;
CountOrs(q, ref counter, expectedDim, ref currentDim, ref countElements, ref countOrs, list);
continue;
}
else if (token.WordType == HqlWordType.KEYWORD && token.Keyword == HqlKeyword.CLOSEDPAREN)
{
return;
}
else if (token.WordType == HqlWordType.KEYWORD && token.Keyword == HqlKeyword.OR)
{
if (thisDim == expectedDim)
{
countOrs++;
}
continue;
}
else if (token.WordType == HqlWordType.KEYWORD && token.Keyword == HqlKeyword.AND)
{
continue;
}
else
{
throw new Exception("Unknown type of HqlToken in WHERE clause");
}
}
else if (o is HqlCompareToken)
{
if (thisDim == expectedDim)
{
countElements++;
if (list != null)
{
list.Add((HqlCompareToken)o);
}
}
continue;
}
else
{
throw new Exception("Unknown type of object in WHERE evaluation.");
}
}
return;
}