Solved by declare an empty somemethod() in FSInputStream and override it in DFSInputStream
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Nan Zhu
School of Computer Science,
McGill University
On Saturday, December 14, 2013 at 7:53 PM, Nan Zhu wrote:
> Hi, all
>
> I’m modifying FSDataInputStream for some project,
>
> I would like to directly manipulate “in" object in my implementation
>
> as in the constructor a DFSInputStream is passed, so I convert “in” from InputStream
to DFSInputStream with
>
> import org.apache.hadoop.hdfs.DFSClient;
>
> DFSClient.DFSInputStream dins = (DFSClient.DFSInputStream) in;
> dins.somemethod(…)
>
>
> when I compile my code with ant
>
> it says that
>
> [javac] /Users/zhunan/codes/SDNBigData/hadoop-1.2.1/src/core/org/apache/hadoop/fs/FSDataInputStream.java:20:
error: package org.apache.hadoop.hdfs does not exist
> [javac] import org.apache.hadoop.hdfs.DFSClient;
>
>
>
> What does this mean?
>
> it means that core is compiled before hdfs, so I cannot do this?
>
> Thank you very much!
>
> Best,
>
> --
> Nan Zhu
> School of Computer Science,
> McGill University
>
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