commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Matt Sun (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (CSV-196) Store the information of raw data read by lexer
Date Wed, 06 Sep 2017 22:59:00 GMT

     [ https://issues.apache.org/jira/browse/CSV-196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matt Sun reopened CSV-196:
--------------------------

I'm reopening this issue because I found that getCharacterPosition doesn't serve the position
when the characters are multiple bytes. I will submit a pull request on Github to suggest
a fix.

> Store the information of raw data read by lexer
> -----------------------------------------------
>
>                 Key: CSV-196
>                 URL: https://issues.apache.org/jira/browse/CSV-196
>             Project: Commons CSV
>          Issue Type: Improvement
>          Components: Parser
>    Affects Versions: 1.4
>            Reporter: Matt Sun
>              Labels: patch
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> It will be good to have CSVParser class to store the info of whether a field was enclosed
by quotes in the original source file.
> For example, for this data sample:
> A, B, C
> a1, "b1", c1
> CSVParser gives us record a1, b1, c1, which is helpful because it parsed double quotes,
but we also lost the information of original data at the same time. We can't tell from the
CSVRecord returned whether the original data is enclosed by double quotes or not.
> In our use case, we are integrating Apache Hadoop APIs with Commons CSV.  CSV is one
kind of input of Hadoop Jobs, which should support splitting input data. To accurately split
a CSV file into pieces, we need to count the bytes of  data CSVParser actually read. CSVParser
doesn't have accurate information of whether a field was enclosed by quotes, neither does
it store raw data of the original source. Downstream users of commons CSVParser is not able
to get those info.
> To suggest a fix: Extend the token/CSVRecord to have a boolean field indicating whether
the column was enclosed by quotes. While Lexer is doing getNextToken, set the flag if a field
is encapsulated and successfully parsed.
> I find another issue reported with similar request, but it was marked as resolved: [CSV91]
https://issues.apache.org/jira/browse/CSV-91?jql=project%20%3D%20CSV%20AND%20text%20~%20%22with%20quotes%22



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Mime
View raw message