kevingurney opened a new pull request, #37044:
URL: https://github.com/apache/arrow/pull/37044
### Rationale for this change
Now that we've have the basic building blocks for tabular IO in the MATLAB
Interface (Array, Schema, RecordBatch), we can implement a Feather V1 reader in
terms of the new APIs.
This is a follow up to #37043, where a new Feather V1 internal `Writer`
object was added.
### What changes are included in this PR?
1. Added a new class called arrow.internal.io.feather.Reader which can be
used to read Feather V1 files. It has one public property named `Filename` and
one public method named `read`.
**Example Usage:**
```matlab
>> T = array2table(rand(3))
T =
3x3 table
Var1 Var2 Var3
_______ ________ _______
0.79221 0.035712 0.67874
0.95949 0.84913 0.75774
0.65574 0.93399 0.74313
>> filename = "test.feather";
>> featherwrite(filename, T)
>> reader = arrow.internal.io.feather.Reader(filename)
reader =
Reader with properties:
Filename: "test.feather"
>> T = reader.read()
T =
3x3 table
Var1 Var2 Var3
_______ ________ _______
0.79221 0.035712 0.67874
0.95949 0.84913 0.75774
0.65574 0.93399 0.74313
```
### Are these changes tested?
Yes.
1. Added `Reader` to `feather/tRoundTrip.m`.
### Are there any user-facing changes?
No.
These are only internal objects right now.
### Future Directions
1. Re-implement `featherread` in terms of the new `Reader` object.
2. Remove legacy feather code and infrastructure.
### Notes
1. For conciseness, I renamed the C++ Proxy class `FeatherWriter` to
`Writer` since it is already inside of a `feather` namespace / "package".
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