protected override Expression VisitMemberAccess(MemberExpression expression)
{
SPModelQueryExpressionScope currentScope = stack.Peek();
switch (expression.Expression.NodeType)
{
case ExpressionType.Parameter:
case ExpressionType.MemberAccess:
case ExpressionType.Convert:
case ExpressionType.Call:
if (expression.Member.DeclaringType == typeof(ISPModelMetaData))
{
switch (expression.Member.Name)
{
case "ID":
currentScope.Field = SPModelQueryFieldInfo.ID;
break;
case "UniqueId":
currentScope.Field = SPModelQueryFieldInfo.UniqueId;
break;
case "FileRef":
currentScope.Field = SPModelQueryFieldInfo.FileRef;
break;
case "FileLeafRef":
currentScope.Field = SPModelQueryFieldInfo.FileLeafRef;
break;
case "LastModified":
currentScope.Field = SPModelQueryFieldInfo.LastModified;
break;
case "CheckOutUserID":
currentScope.Field = SPModelQueryFieldInfo.CheckOutUserID;
break;
default:
throw new NotSupportedException(String.Format("The member '{0}' is not supported", expression.Member.Name));
}
}
else if (expression.Member.DeclaringType == typeof(TaxonomyItem) || expression.Member.DeclaringType == typeof(SPPrincipal))
{
switch (expression.Member.Name)
{
case "Id":
case "ID":
Visit(expression.Expression);
break;
default:
throw new NotSupportedException(String.Format("The member '{0}' is not supported", expression.Member.Name));
}
}
else
{
currentScope.MemberType = expression.Type;
currentScope.Member = expression.Member;
currentScope.FieldAssociations = SPModelFieldAssociationCollection.GetByMember(expression.Member);
}
break;
default:
throw new NotSupportedException(String.Format("The member '{0}' is not supported", expression.Member.Name));
}
return(expression);
}
protected override Expression VisitMemberAccess(MemberExpression expression)
{
if (invariantExpression)
{
return(base.VisitMemberAccess(expression));
}
if (expression.Expression != lambdaParam)
{
if (expression.Member.DeclaringType == typeof(ISPModelMetaData) &&
((expression.Expression.NodeType == ExpressionType.Call && ((MethodCallExpression)expression.Expression).Method == typeof(SPModelExtension).GetMethod("GetMetaData") && ((MethodCallExpression)expression.Expression).Arguments[0] == lambdaParam) ||
(expression.Expression.NodeType == ExpressionType.Convert && ((UnaryExpression)expression.Expression).Operand == lambdaParam)))
{
// allow non-direct field access on the ISPModelMetaData interface
}
else
{
Expression result = base.VisitMemberAccess(expression);
if (expression.Member.DeclaringType.IsGenericType && expression.Member.DeclaringType.GetGenericTypeDefinition() == typeof(Nullable <>) && expression.Member.Name == "HasValue")
{
CamlExpression expr = currentScope.GetExpression(v => Caml.IsNotNull(v.FieldRef));
currentScope.Reset();
currentScope.Expression = expr;
}
return(result);
}
}
currentScope.MemberType = expression.Type;
currentScope.Member = expression.Member;
currentScope.Field = default(SPModelQueryFieldInfo);
currentScope.FieldAssociations = null;
if (expression.Member.DeclaringType == typeof(ISPModelMetaData))
{
switch (expression.Member.Name)
{
case "ID":
currentScope.Field = SPModelQueryFieldInfo.ID;
break;
case "UniqueId":
currentScope.Field = SPModelQueryFieldInfo.UniqueId;
break;
case "FileRef":
currentScope.Field = SPModelQueryFieldInfo.FileRef;
break;
case "FileLeafRef":
currentScope.Field = SPModelQueryFieldInfo.FileLeafRef;
break;
case "LastModified":
currentScope.Field = SPModelQueryFieldInfo.LastModified;
break;
case "CheckOutUserID":
currentScope.Field = SPModelQueryFieldInfo.CheckOutUserID;
break;
default:
throw new NotSupportedException(String.Format("Member '{0}' is not supported", GetMemberFullName(expression.Member)));
}
}
else
{
currentScope.FieldAssociations = SPModelFieldAssociationCollection.GetByMember(expression.Member);
foreach (SPFieldAttribute field in currentScope.FieldAssociations.Fields)
{
if (field.TypeAsString == "TaxonomyFieldType" || field.TypeAsString == "TaxonomyFieldTypeMulti")
{
builder.TaxonomyFields.Add(field.ListFieldInternalName);
}
}
}
if (builder.SelectExpression != null)
{
if (currentScope.Field.FieldRef != null)
{
builder.AddSelectProperty(currentScope.Field.FieldRef);
}
else if (currentScope.FieldAssociations.Queryable && expression.Member.MemberType == MemberTypes.Property && ((PropertyInfo)expression.Member).GetGetMethod().IsAbstract)
{
builder.AddSelectProperty(currentScope.FieldAssociations.Fields.First().ListFieldInternalName);
}
else
{
builder.SelectAllProperties = true;
}
}
return(expression);
}