[jira] [Updated] (CRUNCH-97) Add helpers for parsing PCollection instances

["Matthias Friedrich (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CRUNCH-97?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Friedrich updated CRUNCH-97:
-------------------------------------

    Attachment: CRUNCH-97-Tokenizer-v1.patch

Here's how it would look with Tokenizers. This is just a demo, I would clean it up if we decided to go this way. I'd also have to design a nice call syntax for Parse with tokenizers.

What I don't like about it: It makes nested collections harder to implement (see the ugly hack for Extractors.xcollect()). We also have to pass column positions to ExtractorS - that's the price we pay for flexibility.
                
> Add helpers for parsing PCollection<String> instances
> -----------------------------------------------------
>
>                 Key: CRUNCH-97
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-97
>             Project: Crunch
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Josh Wills
>            Assignee: Josh Wills
>             Fix For: 0.5.0
>
>         Attachments: CRUNCH-97.patch, CRUNCH-97-take2.patch, CRUNCH-97-Tokenizer-v1.patch, CRUNCH-97v3.patch
>
>
> We should make it a bit easier to parse delimited text files into specific data types (e.g., ints, floats, etc.) or combinations of types-- e.g., pairs of strings and ints, a Tuple3 of booleans, etc.

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