/// <summary>
/// Adds or replaces a <see cref="TermNode"/>
/// </summary>
public bool TryAddOrReplace(TermNode term)
{
// Check the term options
if (!TermOptions.TryGetValue(term.TermName, out var termOption))
{
return(false);
}
if (_terms.TryGetValue(term.TermName, out var existingTerm))
{
if (termOption.Single)
{
// Replace
_terms[term.TermName] = term;
return(true);
}
// Add
if (existingTerm is CompoundTermNode compound)
{
compound.Children.Add(term as TermOperationNode);
}
else
{
var newCompound = new AndTermNode(existingTerm as TermOperationNode, term as TermOperationNode);
_terms[term.TermName] = newCompound;
return(true);
}
}
_terms[term.TermName] = term;
return(true);
}
public Func <IQuery <T>, ValueTask <IQuery <T> > > Visit(AndTermNode node, QueryExecutionContext <T> argument)
{
var predicates = new List <Func <IQuery <T>, ValueTask <IQuery <T> > > >();
foreach (var child in node.Children)
{
Func <IQuery <T>, ValueTask <IQuery <T> > > predicate = (q) => argument.Item.AllAsync(
(q) => child.Operation.Accept(this, argument)(q)
);
predicates.Add(predicate);
}
Func <IQuery <T>, ValueTask <IQuery <T> > > result = (Func <IQuery <T>, ValueTask <IQuery <T> > >)Delegate.Combine(predicates.ToArray());
return(result);
}