internal virtual bool Attach(QQuery query, string a_field)
{
Db4objects.Db4o.Internal.Query.Processor.QCon qcon = this;
ClassMetadata yc = GetYapClass();
bool[] foundField = new bool[] { false };
ForEachChildField(a_field, new _IVisitor4_101(foundField, query));
if (foundField[0])
{
return(true);
}
QField qf = null;
if (yc == null || yc.HoldsAnyClass())
{
int[] count = new int[] { 0 };
FieldMetadata[] yfs = new FieldMetadata[] { null };
i_trans.Container().ClassCollection().AttachQueryNode(a_field, new _IVisitor4_119
(yfs, count));
if (count[0] == 0)
{
return(false);
}
if (count[0] == 1)
{
qf = yfs[0].QField(i_trans);
}
else
{
qf = new QField(i_trans, a_field, null, 0, 0);
}
}
else
{
if (yc.IsTranslated())
{
i_trans.Container()._handlers.DiagnosticProcessor().DescendIntoTranslator(yc, a_field
);
}
FieldMetadata yf = yc.FieldMetadataForName(a_field);
if (yf != null)
{
qf = yf.QField(i_trans);
}
if (qf == null)
{
qf = new QField(i_trans, a_field, null, 0, 0);
}
}
QConPath qcp = new QConPath(i_trans, qcon, qf);
query.AddConstraint(qcp);
qcon.AddConstraint(qcp);
return(true);
}
// Our QConPath objects are just placeholders to fields,
// so the parents are reachable.
// If we find a "real" constraint, we throw the QPath
// out and replace it with the other constraint.
private void Morph(BooleanByRef removeExisting, QCon newConstraint, IReflectClass
claxx)
{
bool mayMorph = true;
if (claxx != null)
{
ClassMetadata yc = i_trans.Container().ProduceClassMetadata(claxx);
if (yc != null)
{
IEnumerator i = IterateChildren();
while (i.MoveNext())
{
QField qf = ((QCon)i.Current).GetField();
if (!yc.HasField(i_trans.Container(), qf.Name()))
{
mayMorph = false;
break;
}
}
}
}
// }
if (mayMorph)
{
IEnumerator j = IterateChildren();
while (j.MoveNext())
{
newConstraint.AddConstraint((QCon)j.Current);
}
if (HasJoins())
{
IEnumerator k = IterateJoins();
while (k.MoveNext())
{
QConJoin qcj = (QConJoin)k.Current;
qcj.ExchangeConstraint(this, newConstraint);
newConstraint.AddJoin(qcj);
}
}
i_parent.ExchangeConstraint(this, newConstraint);
removeExisting.value = true;
}
else
{
i_parent.AddConstraint(newConstraint);
}
}
// Our QConPath objects are just placeholders to fields,
// so the parents are reachable.
// If we find a "real" constraint, we throw the QPath
// out and replace it with the other constraint.
private void Morph(BooleanByRef removeExisting, QCon newConstraint, IReflectClass
claxx)
{
bool mayMorph = true;
if (claxx != null)
{
ClassMetadata yc = i_trans.Container().ProduceClassMetadata(claxx);
if (yc != null)
{
IEnumerator i = IterateChildren();
while (i.MoveNext())
{
QField qf = ((QCon)i.Current).GetField();
if (!yc.HasField(i_trans.Container(), qf.Name()))
{
mayMorph = false;
break;
}
}
}
}
// }
if (mayMorph)
{
IEnumerator j = IterateChildren();
while (j.MoveNext())
{
newConstraint.AddConstraint((QCon)j.Current);
}
if (HasJoins())
{
IEnumerator k = IterateJoins();
while (k.MoveNext())
{
QConJoin qcj = (QConJoin)k.Current;
qcj.ExchangeConstraint(this, newConstraint);
newConstraint.AddJoin(qcj);
}
}
i_parent.ExchangeConstraint(this, newConstraint);
removeExisting.value = true;
}
else
{
i_parent.AddConstraint(newConstraint);
}
}