public class JrubyAccumulatorEvalFunc extends AccumulatorEvalFunc<Object>
EvalFunc.SchemaType
log, pigLogger, reporter, returnType
Constructor and Description |
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JrubyAccumulatorEvalFunc(String path,
String methodName)
This constructor is used by JrubyScriptEngine to register a Ruby class as an Accumulator.
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Modifier and Type | Method and Description |
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void |
accumulate(Tuple b)
This uses the "exec" method required of AccumulatorPigUdf Ruby classes.
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void |
cleanup()
Called after getValue() to prepare processing for next key.
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Object |
getValue()
This method calls "get" on the AccumulatorPigUdf Ruby class that was specified.
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Schema |
outputSchema(Schema input)
This provides the Schema of the output, and leverages the get_output_schema function on the class object
that is defined on the ruby side.
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exec
allowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, progress, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn
public void accumulate(Tuple b) throws IOException
accumulate
in interface Accumulator<Object>
accumulate
in class AccumulatorEvalFunc<Object>
b
- A tuple containing a single field, which is a bag. The bag will contain the set
of tuples being passed to the UDF in this iteration.IOException
public void cleanup()
Accumulator
cleanup
in interface Accumulator<Object>
cleanup
in class AccumulatorEvalFunc<Object>
public Object getValue()
getValue
in interface Accumulator<Object>
getValue
in class AccumulatorEvalFunc<Object>
public Schema outputSchema(Schema input)
outputSchema
in class EvalFunc<Object>
input
- Schema of the inputCopyright © 2007-2012 The Apache Software Foundation