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https://issues.apache.org/jira/browse/BEAM-225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15269249#comment-15269249
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ASF GitHub Bot commented on BEAM-225:
-------------------------------------
GitHub user eljefe6a opened a pull request:
https://github.com/apache/incubator-beam/pull/275
[BEAM-225] Create Class for Common TypeDescriptors
Jira issue BEAM-225 Create Class for Common TypeDescriptors. Adding
KVTypeDescriptors and TypeDescriptors to make primitives easier.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/eljefe6a/incubator-beam TypeDescriptors
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-beam/pull/275.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #275
----
commit 8e89c7a9e390ec8026ee46d68d3a422f8917ef71
Author: Jesse Anderson <[email protected]>
Date: 2016-05-03T18:09:08Z
Adding KVTypeDescriptors and TypeDescriptors to make primitives easier.
----
> Create Class for Common TypeDescriptors
> ---------------------------------------
>
> Key: BEAM-225
> URL: https://issues.apache.org/jira/browse/BEAM-225
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Reporter: Jesse Anderson
> Priority: Trivial
> Labels: starter
>
> There should be a built-in class for common types like String, Float, etc.
> Right now, all types have to create an inline TypeDescriptor:
> {code:java}
> PCollection<String> words = suits.apply(
> FlatMapElements.via(
> (String line) -> Arrays.asList(line.split(" "))
> ).withOutputType(new TypeDescriptor<String>() {}));
> {code}
> The should be a built-in class with common types like String so you don't
> have to create a TypeDescriptor each time like:
> {code:java}
> PCollection<String> words = suits.apply(
> FlatMapElements.via(
> (String line) -> Arrays.asList(line.split(" "))
> ).withOutputType(TypeDescriptors.STRINGS));
> {code}
> Another possibility is to make it a static method:
> {code:java}
> PCollection<String> words = suits.apply(
> FlatMapElements.via(
> (String line) -> Arrays.asList(line.split(" "))
> ).withOutputType(TypeDescriptors.strings()));
> {code}
> An example of this is Apache Crunch's Writables class
> https://crunch.apache.org/apidocs/0.11.0/org/apache/crunch/types/writable/Writables.html.
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