GitHub user aalexandrov opened a pull request:
https://github.com/apache/flink/pull/349
Added ResultTypeQueryable interface to TypeSerializerInputFormat.
It is currently impossible to use the `TypeSerializerInputFormat` with
generic Tuple types.
For example, [this example
gist](https://gist.github.com/aalexandrov/90bf21f66bf604676f37) fails with a
```
Exception in thread "main"
org.apache.flink.api.common.InvalidProgramException: The type returned by the
input format could not be automatically determined. Please specify the
TypeInformation of the produced type explicitly.
at
org.apache.flink.api.java.ExecutionEnvironment.readFile(ExecutionEnvironment.java:341)
at SerializedFormatExample$.main(SerializedFormatExample.scala:48)
at SerializedFormatExample.main(SerializedFormatExample.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
```
exaception.
To fix the issue, I changed the constructor to take a `TypeInformation<T>`
instad of a `TypeSerializer<T>` argument. If this is indeed a bug, I think that
this is a good solution.
Unfortunately the fix breaks the API. Feel free to change it if you find a
more elegant solution compatible with the 0.8 branch.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aalexandrov/flink
typeserializerinputformat_fix
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/349.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 #349
----
commit 2c1816640574c182f3b9f556ec5bab5df6f56f2c
Author: Alexander Alexandrov <[email protected]>
Date: 2015-01-29T14:41:01Z
Added ResultTypeQueryable interface implementation to
TypeSerializerInputFormat.
----
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