Adapt Python bindings

cpp/src/parquet/api/reader.h

@@ -24,7 +24,9 @@
 #include "parquet/exception.h"
 #include "parquet/file_reader.h"
 #include "parquet/metadata.h"
+#include "parquet/platform.h"
 #include "parquet/printer.h"
+#include "parquet/properties.h"
 
 // Schemas
 #include "parquet/api/schema.h"

python/pyarrow/_parquet.pxd

@@ -229,7 +229,7 @@ cdef extern from "parquet/api/reader.h" namespace "parquet" nogil:
         unique_ptr[CRowGroupMetaData] RowGroup(int i)
         const SchemaDescriptor* schema()
         shared_ptr[const CKeyValueMetadata] key_value_metadata() const
-        void WriteTo(ParquetOutputStream* dst) const
+        void WriteTo(OutputStream* dst) const
 
     cdef shared_ptr[CFileMetaData] CFileMetaData_Make \
         " parquet::FileMetaData::Make"(const void* serialized_metadata,
@@ -253,13 +253,6 @@ cdef extern from "parquet/api/reader.h" namespace "parquet" nogil:
 
 
 cdef extern from "parquet/api/writer.h" namespace "parquet" nogil:
-    cdef cppclass ParquetOutputStream" parquet::OutputStream":
-        pass
-
-    cdef cppclass ParquetInMemoryOutputStream \
-            " parquet::InMemoryOutputStream"(ParquetOutputStream):
-        shared_ptr[CBuffer] GetBuffer()
-
     cdef cppclass WriterProperties:
         cppclass Builder:
             Builder* version(ParquetVersion version)

python/pyarrow/_parquet.pyx

@@ -31,7 +31,7 @@ from pyarrow.includes.libarrow cimport *
 from pyarrow.lib cimport (Buffer, Array, Schema,
                           check_status,
                           MemoryPool, maybe_unbox_memory_pool,
-                          Table,
+                          Table, NativeFile,
                           pyarrow_wrap_chunked_array,
                           pyarrow_wrap_schema,
                           pyarrow_wrap_table,
@@ -39,7 +39,8 @@ from pyarrow.lib cimport (Buffer, Array, Schema,
                           NativeFile, get_reader, get_writer)
 
 from pyarrow.compat import tobytes, frombytes
-from pyarrow.lib import ArrowException, NativeFile, _stringify_path
+from pyarrow.lib import (ArrowException, NativeFile, _stringify_path,
+                         BufferOutputStream)
 from pyarrow.util import indent
 
 
@@ -421,11 +422,13 @@ cdef class FileMetaData:
         self._metadata = metadata.get()
 
     def __reduce__(self):
-        cdef ParquetInMemoryOutputStream sink
+        cdef:
+            NativeFile sink = BufferOutputStream()
+            OutputStream* c_sink = sink.get_output_stream().get()
         with nogil:
-            self._metadata.WriteTo(&sink)
+            self._metadata.WriteTo(c_sink)
 
-        cdef Buffer buffer = pyarrow_wrap_buffer(sink.GetBuffer())
+        cdef Buffer buffer = sink.getvalue()
         return _reconstruct_filemetadata, (buffer,)
 
     def __repr__(self):