PARQUET-2020: Remove deprecated modules

[Fokko]

Removes:

• parquet-tools-deprecated
• parquet-scrooge-deprecated
• parquet-cascading-common23-deprecated
• parquet-cascading-deprecated
• parquet-cascading3-deprecated

Make sure you have checked all steps below.

Jira

• My PR addresses the following Parquet Jira issues and references them in the PR title. For example, "PARQUET-1234: My Parquet PR"
  • https://issues.apache.org/jira/browse/PARQUET-2020
  • In case you are adding a dependency, check if the license complies with the ASF 3rd Party License Policy.

Tests

• My PR adds the following unit tests OR does not need testing for this extremely good reason:

Commits

• My commits all reference Jira issues in their subject lines. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters (not including Jira issue reference)
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Documentation

• In case of new functionality, my PR adds documentation that describes how to use it.
  • All the public functions and the classes in the PR contain Javadoc that explain what it does

[ChrisCollinsIBM]

@Fokko @gszadovszky

I hope you can point me in the right direction. With the deprecation and removal of parquet-tools, is there any way in Java code to render a JSON representation of a parquet record?

We were previously using parquet.tools.util.JsonRecordFormatter like this.

HadoopInputFile inputFile = HadoopInputFile.fromPath(new Path(filePath), hadoopConfig);
		
try (ParquetFileReader reader = ParquetFileReader.open(inputFile))
{
	MessageType schema = reader.getFooter().getFileMetaData().getSchema();
	JsonRecordFormatter.JsonGroupFormatter formatter = JsonRecordFormatter.fromSchema(schema);
	PageReadStore pages;
			
	while ((pages = reader.readNextRowGroup()) != null)
	{
		long rows = pages.getRowCount();
		MessageColumnIO columnIO = new ColumnIOFactory().getColumnIO(schema);
		RecordReader<SimpleRecord> recordReader = columnIO.getRecordReader(pages, new SimpleRecordMaterializer(schema));
	
		for (int i = 0; i < rows; i++)
		{
			SimpleRecord simpleRecord = (SimpleRecord) recordReader.read();
			System.out.println(formatter.formatRecord(simpleRecord));
		}
	}
}

Is there anything in the remaining libraries that can achieve this? And if not could we look at pulling these classes back in to maybe parquet-format-structures or some other related project that makes sense?

I would have opened this as an issue but I don't see issues enabled for this repository.

EDIT: Question cross-posted to https://issues.apache.org/jira/browse/PARQUET-2020

[ChrisCollinsIBM]

Would still love to get some clarity on a path forward on this @Fokko @gszadovszky

Thanks!