Update delimited table handling to allow for empty fields

[rchenatjpl]

In the attached one-row .csv file, fields 6,7,9 are totally blank, and field 8 is a few blanks. The first three should definitely not draw an error, since that's the point of using table_delimited vs. a regular table. I opine that field 8 should not be an error, but maybe it should - I haven't thought deeply about it. I guess I would vote for no error since that's what earlier versions of validate did, and maybe nodes have submitted such data.
pit_test_icy_soil_dig1.csv.txt
pit_test_icy_soil_dig1.xml.txt

Separate issue: what's up with the "com.sun.xml.bind..." message - can you suppress that? It's acceptable, just annoying.

Richard

% validate -t pit_test_icy_soil_dig1.xml
Oct 15, 2019 3:22:10 PM com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector
INFO: The optimized code generation is disabled
PDS Validate Tool Report
Configuration:
Version 1.17.1
Date 2019-10-15T22:22:07Z
Parameters:
Targets [file:/Users/rchen/Desktop/pit_test_icy_soil_dig1.xml]
Severity Level WARNING
Recurse Directories true
File Filters Used [.xml, .XML]
Data Content Validation on
Product Level Validation on
Max Errors 100000
Registered Contexts File /PDS4tools/validate/resources/registered_context_products.json
Product Level Validation Results
FAIL: file:/Users/rchen/Desktop/pit_test_icy_soil_dig1.xml
Begin Content Validation: file:/Users/rchen/Desktop/pit_test_icy_soil_dig1.csv
ERROR [error.table.field_value_data_type_mismatch] table 1, record 1, field 6: Value does not match its data type 'ASCII_Real': '' does not match the pattern '(+|-)?([0-9]+(.[0-9])?|.[0-9]+)(Ee?[0-9]+)?'
ERROR [error.table.field_value_data_type_mismatch] table 1, record 1, field 7: Value does not match its data type 'ASCII_Real': '' does not match the pattern '(+|-)?([0-9]+(.[0-9])?|.[0-9]+)(Ee?[0-9]+)?'
ERROR [error.table.field_value_data_type_mismatch] table 1, record 1, field 8: Value does not match its data type 'ASCII_Real': '' does not match the pattern '(+|-)?([0-9]+(.[0-9])?|.[0-9]+)(Ee?[0-9]+)?'
ERROR [error.table.field_value_data_type_mismatch] table 1, record 1, field 9: Value does not match its data type 'ASCII_Real': '' does not match the pattern '(+|-)?([0-9]+(.[0-9])?|.[0-9]+)(Ee?[0-9]+)?'
End Content Validation: file:/Users/rchen/Desktop/pit_test_icy_soil_dig1.csv
Validation complete.
Summary:
4 error(s)
0 warning(s)
Message Types:
4 error.table.field_value_data_type_mismatch
End of Report

[jordanpadams]

Most likely relates to #9

[jordanpadams]

@rchenatjpl the issue with empty fields is fixed per #138.

per your comment regarding allowing space characters, i would disagree. a space character is an actual ASCII character and should be considered as such. the SR DSV standard (4C.1 Delimiter Separated Value Format Description) does say "Leading and trailing spaces in a field are considered part of the field" but it does not explicitly call out fields with only spaces are allowed. my two cents anyways...

[jordanpadams]

@rchenatjpl new release tagged: https://github.com/NASA-PDS-Incubator/validate/releases/tag/1.17.2