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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1245) Introduce TypeHints for Java API operators
Date Sat, 06 Dec 2014 13:01:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14236781#comment-14236781
] 

ASF GitHub Bot commented on FLINK-1245:
---------------------------------------

Github user rmetzger commented on a diff in the pull request:

    https://github.com/apache/incubator-flink/pull/203#discussion_r21416441
  
    --- Diff: flink-java8/src/test/java/org/apache/flink/api/java/type/lambdas/LambdaExtractionTest.java
---
    @@ -129,10 +129,12 @@ public void testMapLambda() {
     		MapFunction<Tuple2<Tuple1<Integer>, Boolean>, Tuple2<Tuple1<Integer>,
String>> f = (i) -> null;
     		
     		TypeInformation<?> ti = TypeExtractor.getMapReturnTypes(f, TypeInfoParser.parse("Tuple2<Tuple1<Integer>,
Boolean>"));
    -		Assert.assertTrue(ti.isTupleType());
    -		Assert.assertEquals(2, ti.getArity());
    -		Assert.assertTrue(((TupleTypeInfo<?>) ti).getTypeAt(0).isTupleType());
    -		Assert.assertEquals(((TupleTypeInfo<?>) ti).getTypeAt(1), BasicTypeInfo.STRING_TYPE_INFO);
    +        if (ti != null) {
    --- End diff --
    
    spaces vs tabs?


> Introduce TypeHints for Java API operators
> ------------------------------------------
>
>                 Key: FLINK-1245
>                 URL: https://issues.apache.org/jira/browse/FLINK-1245
>             Project: Flink
>          Issue Type: Improvement
>          Components: Java API
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>
> Due to type extraction issues with Java 8 Lambdas and many users with type erasure issues,
TypeHints need to be introduced.
> The whole discussion can be found on the mailing list:
> http://mail-archives.apache.org/mod_mbox/flink-dev/201410.mbox/%3C544FA7D6.1070708@twalthr.com%3E



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