Filter* ConstantFilter::combinable(Filter* f, Operator *op)
{
if (typeid(*f) == typeid(SimpleFilter))
{
SimpleFilter *sf = dynamic_cast<SimpleFilter*>(f);
return sf->combinable(this, op);
}
// constant filter may have NULL fOp, when it's equalivant to a pure simple filter
if (typeid(ConstantFilter) == typeid(*f) &&
(!fOp || fOp->data().compare(op->data()) == 0 ))
{
ConstantFilter *cf = dynamic_cast<ConstantFilter*>(f);
if (cf && ( !cf->op() || !fOp || fOp->data().compare(cf->op()->data()) == 0 )
&& fCol->sameColumn(cf->col().get()))
{
for (unsigned int i = 0; i < cf->filterList().size(); i++)
fFilterList.push_back(cf->filterList()[i]);
fOp.reset(op);
return this;
}
}
return NULL;
}
