Jerry He created HBASE-15223:
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             Summary: Make pubic convertScanToString for Spark
                 Key: HBASE-15223
                 URL: https://issues.apache.org/jira/browse/HBASE-15223
             Project: HBase
          Issue Type: Improvement
            Reporter: Jerry He


One way to access HBase from Spark is to use newAPIHadoopRDD, which can take a 
TableInputFormat as class name.  But we are not able to set a Scan object in 
there, for example to set a HBase filter.

In MR,  the public API TableMapReduceUtil.initTableMapperJob() or equivalent is 
used which can take a Scan object.  But this call is not used in Spark 
conveniently. 

We need to make the TableMapReduceUtil.convertScanToString() public.
So that a Scan object can be created, populated and then convert to the 
property and used by Spark.  They are now package private.  



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