Pre-coding tasks

• Fold in the output of [c++] Design doc for C++ work #1239
• Enumerate whatever's not already OK with [c++] C++ unification tracking (high-level/parent issue) #922
• Close out [c++] C++ unification tracking (high-level/parent issue) #922
• Replace it with a new write-up

Set up new directory structure

• [c++] Reorganize C++ directory structure to separate public and internal headers #1300

Create internal use classes

• SOMAArray
  • [c++] Rename SOMAArrayReader to SOMAArray #1282
  • Metadata functions [c++] Add metadata functions to SOMAArray #926: First pass places metadata values into void* buffer
    • [c++] SOMAObjects need metadata accessible in both read and write mode #1577
    • Second pass to return as SOMAMetadataMapping where underlying data structure is an arrow::Table
  • schema: First pass will use the already existing ArraySchema SOMAArrayReader::schema()
    • Additional pass to return arrow::schema [c++] Implement Arrow-schema-getter in C++ #1121
  • read_next: First pass will return data as ArrayBuffers (already implemented)
    • Additional pass to return arrow::RecordBatch or arrow::Table
  • write: First pass [c++] Implement basic SOMAArray write #1364
    • Additional pass to add batching and parallization optimizations [c++] Placeholder for batch_size and partitions #1175 (comment)
    • Additional pass to take data in the form of arrow::RecordBatch or arrow::Table
• SOMAGroup
  • open
  • close
  • Metadata functions [c++] Add metadata functions to SOMAGroup #1247
    • [c++] SOMAObjects need metadata accessible in both read and write mode #1577
    • SOMAGroup should return SOMAMetadataMapping where underlying data structure is an arrow::Table #1351
  • Group member functions [c++] Add member functions to SOMAGroup #1248
  • member_to_uri_mapping [c++] Implement group member-names-to-URIs map in C++ #1122'
    • [c++] member_to_uri_mapping needs to be accessible in read and write mode #1623

Create public API

• [c++] Create SOMAObject #1356
• [c++] Create SOMACollection #1256
• [c++] Create SOMAExperiment #1354
• [c++] Create SOMAMeasurement #1355
• [c++] Create SOMADataFrame #1257
• [c++] Create SOMA{Sparse,Dense}NDArray #1258
• [c++] SOMAObject open Functions Should Take Start and End Timestamps #1575

Replace API bindings

• [python] Use new C++ API bindings in Python API (parent task) #1632
• Replace TileDB-SOMA-R bindings