iajoiner commented on a change in pull request #9702:
URL: https://github.com/apache/arrow/pull/9702#discussion_r787405066
##########
File path: python/pyarrow/_orc.pyx
##########
@@ -36,7 +36,233 @@ from pyarrow.lib cimport (check_status, _Weakrefable,
pyarrow_unwrap_table,
get_reader,
get_writer)
-from pyarrow.lib import tobytes
+from pyarrow.lib import frombytes, tobytes
+
+
+cdef compression_type_from_enum(CCompressionType compression_type_):
+ return {
+ CCompressionType_UNCOMPRESSED: 'UNCOMPRESSED',
+ CCompressionType_GZIP: 'ZLIB',
+ CCompressionType_SNAPPY: 'SNAPPY',
+ CCompressionType_LZ4: 'LZ4',
+ CCompressionType_ZSTD: 'ZSTD',
+ }.get(compression_type_, 'UNKNOWN')
+
+
+cdef CCompressionType compression_type_from_name(name) except *:
+ if not isinstance(name, str):
+ raise TypeError('compression must be a string')
+ name = name.upper()
+ if name == 'ZLIB':
+ return CCompressionType_GZIP
+ elif name == 'SNAPPY':
+ return CCompressionType_SNAPPY
+ elif name == 'LZ4':
+ return CCompressionType_LZ4
+ elif name == 'ZSTD':
+ return CCompressionType_ZSTD
+ elif name == 'UNCOMPRESSED':
+ return CCompressionType_UNCOMPRESSED
+ raise ValueError('Unknown CompressionKind: {0}'.format(name))
+
+
+cdef compression_strategy_from_enum(CompressionStrategy compression_strategy_):
+ return {
+ _CompressionStrategy_SPEED: 'SPEED',
+ _CompressionStrategy_COMPRESSION: 'COMPRESSION',
+ }.get(compression_strategy_, 'UNKNOWN')
+
+
+cdef CompressionStrategy compression_strategy_from_name(name) except *:
+ if not isinstance(name, str):
+ raise TypeError('compression strategy must be a string')
+ name = name.upper()
+ # SPEED is the default value in the ORC C++ implementaton
Review comment:
You’re right. It has been removed.
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