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From: <olivier.varene@orange.com>
To: "dev@giraph.apache.org" <dev@giraph.apache.org>
Subject: Giraph - Porting to Java 1.6 - diamond operator issue
Thread-Topic: Giraph - Porting to Java 1.6 - diamond operator issue
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Date: Wed, 31 Dec 2014 09:21:49 +0000
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Hi to all,

because of actual production environment constraints, I need to make Giraph=
 1.1 compatible with Java 1.6.
My production environment is Java 1.6.0_26-b03 / Cloudera cdh4.4.0 ... I kn=
ow, I know ... :( :( :(

However, I am stuck on this syntax, and I don't know how to make it compati=
ble with Java 1.6 .

* diamond operator is not supported in 1.6 so

here "new WrappedMappingInputFormat<>("


public WrappedMappingInputFormat<I, V, E, ? extends Writable>
createWrappedMappingInputFormat() {
  // how to determine ? extends Writable
  // via conf ?   mappingTargetClass ???
  //Type T =3D mappingTargetClass.getGenericSuperclass();
  //Class<T> l_writable =3D (Class<T>) ((ParameterizedType) getMappingInput=
FormatClass().getGenericSuperclass()).getActualTypeArguments()[3];

  WrappedMappingInputFormat<I, V, E, ? extends Writable>
    wrappedMappingInputFormat =3D
      new WrappedMappingInputFormat<>(createMappingInputFormat());
  configureIfPossible(wrappedMappingInputFormat);
  return wrappedMappingInputFormat;
}


What would be the trick / construct to make it 1.6 compatible ?
( watch out the "? extends Writable" ... )


Thanks a lot

best regards and happy new year

Olivier
=20

------------------------------------
Olivier Var=E8ne
Big Data Referent
Orange - DSI France/Digital Factory
olivier.varene@orange.com
+33 4 97 46 29 94








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