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An evaluator for multi-row (tables like in SQL) expressions
TableEvaluator (const TableEvaluator& original)
| TableEvaluator |
Copy constructor, duplicates current state of original
Parameters:
original | Evaluator to copy |
TableEvaluator (ExpEvaluator::Parser style)
| TableEvaluator |
Constructor from a parser synatx style
Parameters:
style | Style of evaluator to create |
TableEvaluator (const TokenDict* operators, const TokenDict* unaryOps)
| TableEvaluator |
Constructor from operator description table
Parameters:
operators | Pointer to operators synatx table |
unaryOps | Pointer to unary operators dictionary |
~TableEvaluator ()
| ~TableEvaluator |
[virtual]
Destructor
bool evalWhere (GenObject* context = 0)
| evalWhere |
[virtual]
Evaluate the WHERE (selector) expression
Parameters:
context | Pointer to arbitrary object to be passed to called methods |
Returns: True if the current row is part of selection
bool evalSelect (ObjList& results, GenObject* context = 0)
| evalSelect |
[virtual]
Evaluate the SELECT (results) expression
Parameters:
results | List to fill with results row |
context | Pointer to arbitrary object to be passed to called methods |
Returns: True if evaluation succeeded
unsigned int evalLimit (GenObject* context = 0)
| evalLimit |
[virtual]
Evaluate the LIMIT expression and cache the result
Parameters:
context | Pointer to arbitrary object to be passed to called methods |
Returns: Desired maximum number or result rows
void extender (ExpExtender* ext)
| extender |
Set the expression extender to use in all evaluators
Parameters:
ext | Pointer to the extender to use, NULL to remove current |
ExpEvaluator m_select | m_select |
[protected]
ExpEvaluator m_where | m_where |
[protected]
ExpEvaluator m_limit | m_limit |
[protected]
unsigned int m_limitVal | m_limitVal |
[protected]
Generated by: paulc on bussard on Sun Oct 20 21:06:06 2013, using kdoc 2.0a54. |