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From Ted Yu <yuzhih...@gmail.com>
Subject Re: User defined class as Map/Reduce output value
Date Tue, 27 Apr 2010 18:19:35 GMT
Take a look at the sample given in Javadoc of Writable.java
You need to serialize your data yourself:
    public void readFields(DataInput in) throws IOException {
      h = Text.readString(in);
      sc = in.readFloat();
      ran = in.readInt ();

On Tue, Apr 27, 2010 at 10:53 AM, Farhan Husain

> Hello,
> I want to output a class which I have written as the value of the map
> phase.
> The obvious was is to implement the Writable interface but the problem is
> the class has other classes as its member properties. The DataInput and
> DataOutput interfaces used by the read and write methods of the Writable
> class do not support object serialization. Is there any other way I can
> achieve this?
> Thanks,
> Farhan

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