private void ProcessSelectableIdentifierEntityAccessor(IdentifierEntityAccessor expression, bool isSubQuery, Func <string, string> createVariableName, StrongEntityAccessor mainEntityAccessor)
{
if (_currentStrongEntityAccessorVisitDelegate == VisitStrongEntityAccessorInternal)
{
_currentStrongEntityAccessorVisitDelegate = VisitStrongEntityAccessorInternalQuick;
}
if (!isSubQuery)
{
if ((_metaGraphVariableName == null) && (_entityVariableName == null))
{
_metaGraphVariableName = String.Format("G{0}", expression.About.Name);
_entityVariableName = _ownerVariableName = expression.About.Name + "_Distinct";
}
_subjectVariableName = expression.About.Name;
_predicateVariableName = expression.About.Name + "_Predicate";
_objectVariableName = expression.About.Name + "_Object";
_commandText.AppendFormat(
"DISTINCT(?{2}) AS ?{1} ?{0} ?{3} ?{4} ?{5} ",
_metaGraphVariableName,
_entityVariableName,
expression.About.Name,
_predicateVariableName,
_objectVariableName,
_ownerVariableName);
}
}
/// <summary>Visit an identifier entity accessor.</summary>
/// <param name="entityAccessor">Identifier entity accessor to be visited.</param>
protected override void VisitIdentifierEntityAccessor(IdentifierEntityAccessor entityAccessor)
{
Call predicateBind = new Call(MethodNames.Bind);
predicateBind.Arguments.Add(new Alias(new Literal(Rdf.predicate), new Identifier(entityAccessor.About.Name + "_Predicate")));
Call objectBind = new Call(MethodNames.Bind);
objectBind.Arguments.Add(new Alias(new Literal(Rdf.@object), new Identifier(entityAccessor.About.Name + "_Object")));
_injectedComponents.Add(predicateBind);
_injectedComponents.Add(objectBind);
VisitStrongEntityAccessor(entityAccessor.EntityAccessor);
_injectedComponents.Clear();
}
private void OverrideIdentifierSelector(StrongEntityAccessor entityAccessor)
{
IdentifierEntityAccessor identifierEntityAccessor = new IdentifierEntityAccessor(entityAccessor.About, entityAccessor);
int indexOf = -1;
if ((indexOf = _query.Elements.IndexOf(entityAccessor)) != -1)
{
_query.Elements.RemoveAt(indexOf);
_query.Elements.Insert(indexOf, identifierEntityAccessor);
}
_query.Select.Clear();
_query.Select.Add(identifierEntityAccessor);
_mainFromComponent = identifierEntityAccessor;
}
/// <summary>Visit an identifier entity accessor.</summary> /// <param name="entityAccessor">Identifier entity accessor to be visited.</param> protected abstract void VisitIdentifierEntityAccessor(IdentifierEntityAccessor entityAccessor);
/// <summary>Default constructor with nagivated identifier entity accessor.</summary>
/// <param name="entityAccessor">Nagivated entity accessor.</param>
internal IdentifierEntityAccessorNavigator(IdentifierEntityAccessor entityAccessor)
: base(entityAccessor)
{
}
/// <summary>Default constructor with nagivated identifier entity accessor.</summary>
/// <param name="entityAccessor">Nagivated entity accessor.</param>
internal IdentifierEntityAccessorNavigator(IdentifierEntityAccessor entityAccessor)
: base(entityAccessor)
{
}
