[arrow] 06/24: PARQUET-807: Allow user to retain ownership of parquet::FileMetaData.

[we...@apache.org]

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wesm pushed a commit to branch master
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commit 58ad1a8b68ebdb9034d0ea0150aa068875437467
Author: Wes McKinney <we...@twosigma.com>
AuthorDate: Thu Jan 5 12:19:31 2017 -0500

    PARQUET-807: Allow user to retain ownership of parquet::FileMetaData.
    
    Also implements PARQUET-808: opening file with existing metadata object.
    
    This allows a user to create a reader only for the purposes of obtaining the metadata.
    
    Do you all think it's worth having a convenience method for reading the metadata out of a file?
    
    Author: Wes McKinney <we...@twosigma.com>
    
    Closes #213 from wesm/PARQUET-807 and squashes the following commits:
    
    c1b5c7c [Wes McKinney] Use ReadMetaData function in test
    d382cca [Wes McKinney] Add note about ARROW-455
    05ecd37 [Wes McKinney] Implement/test opening with provided metadata. Do not close Arrow output files automatically
    d790bb5 [Wes McKinney] Tweak
    0dd4184 [Wes McKinney] Add ReadMetaData convenience method
    97527ba [Wes McKinney] Change FileMetaData in ParquetFileReader to a shared_ptr so that ownership can be transferred away
    
    Change-Id: Ic76c48671b41816d3dc1ebb736eb5a06c907c95d
---
 cpp/examples/parquet/reader-writer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpp/examples/parquet/reader-writer.cc b/cpp/examples/parquet/reader-writer.cc
index 0289eed..59ee63b 100644
--- a/cpp/examples/parquet/reader-writer.cc
+++ b/cpp/examples/parquet/reader-writer.cc
@@ -226,7 +226,7 @@ int main(int argc, char** argv) {
     std::unique_ptr<parquet::ParquetFileReader> parquet_reader =
         parquet::ParquetFileReader::OpenFile(PARQUET_FILENAME, false);
     // Get the File MetaData
-    const parquet::FileMetaData* file_metadata = parquet_reader->metadata();
+    std::shared_ptr<parquet::FileMetaData> file_metadata = parquet_reader->metadata();
 
     // Get the number of RowGroups
     int num_row_groups = file_metadata->num_row_groups();