Solved by declare an empty somemethod() in FSInputStream and override it in DFSInputStream
-- 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 >
