private void Inspect()
{
if (authorizer != null && !authorizer.Authorize(context))
{
throw new SecurityException("The current user does not have permission to query from the requested resource.");
}
}
private void Inspect()
{
if (authorizer == null)
{
authorizer = context.QueryContext.GetApiService <IQueryExpressionAuthorizer>();
}
if (authorizer != null && !authorizer.Authorize(context))
{
throw new SecurityException("The current user does not have permission to query from the requested resource.");
}
}
private void Inspect()
{
if (authorizer == null)
{
authorizer = context.QueryContext.GetApiService <IQueryExpressionAuthorizer>();
}
if (authorizer != null && !authorizer.Authorize(context))
{
throw new InvalidOperationException(Resources.InspectionFailed);
}
}
public override Expression Visit(Expression node)
{
if (node == null)
{
return(null);
}
// Initialize and push the visited node
var visited = node;
context.PushVisitedNode(visited);
// If visited node has already been processed,
// skip normalization, inspection and filtering
// and simply replace with the processed node
if (processedExpressions.ContainsKey(visited))
{
node = processedExpressions[visited];
}
else
{
// Only visit the visited node's children if
// the visited node represents API data
if (!(context.ModelReference is DataSourceStubModelReference))
{
// Visit visited node's children
node = base.Visit(visited);
}
// Inspect the visited node
//Inspect();
if (authorizer != null && !authorizer.Authorize(context))
{
return(null);
// throw new SecurityException("The current user does not have permission to query from the requested resource.");
}
// Try to expand the visited node
// if it represents API data
if (context.ModelReference is DataSourceStubModelReference)
{
node = Expand(visited);
}
// Process the visited node
node = Process(visited, node);
}
if (visited == node)
{
if (context.ModelReference is DataSourceStubModelReference)
{
// If no processing occurred on the visited node
// and it represents API data, then it must be
// in its most primitive form, so source the node
node = Source(node);
}
if (BaseQuery == null)
{
// The very first time control reaches here, the
// visited node represents the original starting
// point for the entire composed query, and thus
// it should produce a non-embedded expression.
if (!(node is ConstantExpression constant))
{
throw new NotSupportedException(Resources.OriginalExpressionShouldBeConstant);
}
BaseQuery = constant.Value as IQueryable;
if (BaseQuery == null)
{
throw new NotSupportedException(Resources.OriginalExpressionShouldBeQueryable);
}
node = BaseQuery.Expression;
}
}
// TODO GitHubIssue#28 : Support transformation between API types and data source proxy types
context.PopVisitedNode();
if (context.VisitedNode != null)
{
EntitySet = context.ModelReference != null ?
context.ModelReference.EntitySet : null;
}
return(node);
}