private bool TryBindProperty(Expression source, MemberIdentity member, out SqlExpression expression)
{
if (source is EntityShaperExpression entityShaperExpression)
{
var projectionBindingExpression = (ProjectionBindingExpression)entityShaperExpression.ValueBufferExpression;
var selectExpression = ((SelectExpression)projectionBindingExpression.QueryExpression);
var entityType = entityShaperExpression.EntityType;
var property = member.MemberInfo != null
? entityType.FindProperty(member.MemberInfo)
: entityType.FindProperty(member.Name);
if (property != null)
{
expression = selectExpression.BindProperty(property, projectionBindingExpression);
return(true);
}
var navigation = member.MemberInfo != null
? entityType.FindNavigation(member.MemberInfo)
: entityType.FindNavigation(member.Name);
expression = selectExpression.BindNavigation(navigation, projectionBindingExpression);
return(true);
}
else if (source is ObjectAccessExpression objectAccessExpression)
{
var entityType = objectAccessExpression.Navigation.GetTargetType();
var property = member.MemberInfo != null
? entityType.FindProperty(member.MemberInfo)
: entityType.FindProperty(member.Name);
if (property != null)
{
expression = new KeyAccessExpression(property, objectAccessExpression);
return(true);
}
var navigation = member.MemberInfo != null
? entityType.FindNavigation(member.MemberInfo)
: entityType.FindNavigation(member.Name);
expression = new ObjectAccessExpression(navigation, objectAccessExpression);
return(true);
}
expression = null;
return(false);
}
public ObjectAccessExpression BindNavigation(INavigation navigation)
{
if (!EntityType.GetTypesInHierarchy().Contains(navigation.DeclaringEntityType))
{
throw new InvalidOperationException(
$"Called EntityProjectionExpression.GetNavigation() with incorrect INavigation. EntityType:{EntityType.DisplayName()}, Navigation:{navigation.Name}");
}
if (!_navigationExpressionsCache.TryGetValue(navigation, out var expression))
{
expression = new ObjectAccessExpression(navigation, AccessExpression);
_navigationExpressionsCache[navigation] = expression;
}
return(expression);
}
private bool TryBindProperty(Expression source, MemberIdentity member, out SqlExpression expression)
{
if (source is EntityProjectionExpression entityProjectionExpression)
{
var entityType = entityProjectionExpression.EntityType;
var property = member.MemberInfo != null
? entityType.FindProperty(member.MemberInfo)
: entityType.FindProperty(member.Name);
if (property != null)
{
expression = entityProjectionExpression.BindProperty(property);
return(true);
}
var navigation = member.MemberInfo != null
? entityType.FindNavigation(member.MemberInfo)
: entityType.FindNavigation(member.Name);
expression = entityProjectionExpression.BindNavigation(navigation);
return(true);
}
else if (source is ObjectAccessExpression objectAccessExpression)
{
var entityType = objectAccessExpression.Navigation.GetTargetType();
var property = member.MemberInfo != null
? entityType.FindProperty(member.MemberInfo)
: entityType.FindProperty(member.Name);
if (property != null)
{
expression = new KeyAccessExpression(property, objectAccessExpression);
return(true);
}
var navigation = member.MemberInfo != null
? entityType.FindNavigation(member.MemberInfo)
: entityType.FindNavigation(member.Name);
expression = new ObjectAccessExpression(navigation, objectAccessExpression);
return(true);
}
expression = null;
return(false);
}
protected abstract Expression VisitObjectAccess(ObjectAccessExpression objectAccessExpression);
protected override Expression VisitObjectAccess(ObjectAccessExpression objectAccessExpression)
{
_sqlBuilder.Append(objectAccessExpression);
return(objectAccessExpression);
}
