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New microservice to open data files with help of a reader factory

Jaswant Panchumarti (Kitware) requested to merge jaswant.panchumarti/paraview:open-data-file-microservice into master
  • depends upon async/paraview!289
  • closes async/paraview#31
  • vtkPTSPipelineBuilder::CreateReader is now complete and can create readers for single file or fileseries. A todo was documented about this missing feature. This merge request completes the work.
  • The new microservice vtkPTSDataFile can be used to open a single file or a fileseries (can.e.4.0, can.e.4.1, can.e.4.2)
  • You may obtain a reader with vtkPTSDataFile::Open(...)
  • If you prefer to obtain a list of possible readers, vtkPTSDataFile::FindPossibleReaders(...) returns a vtkStringArray with all possible readers.
  • The list of possible readers is formatted as {"group1,proxy1", "group2,proxy2", "group3,proxy3"}. I would like it if we can use std::vector<std::pair<std::string, std::string>> instead. The task is the python observable wrapper needs to be taught how to wrap it.
  • I'll create python wrapper and python test after C++ API settles down.

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