org.apache.datasketches.pig.theta

Class DataToSketch.Initial

java.lang.Object

org.apache.pig.EvalFunc<org.apache.pig.data.Tuple>

org.apache.datasketches.pig.theta.DataToSketch.Initial

Enclosing class:

DataToSketch

public static class DataToSketch.Initial
extends org.apache.pig.EvalFunc<org.apache.pig.data.Tuple>

Class used to calculate the initial pass of an Algebraic sketch operation.

The Initial class simply passes through all records unchanged so that they can be processed by the intermediate processor instead.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.pig.EvalFunc

org.apache.pig.EvalFunc.SchemaType

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

Constructors

Constructor and Description
Initial() Default constructor to make pig validation happy.
Initial(String nomEntriesStr) Constructor for the initial pass of an Algebraic function.
Initial(String nomEntriesStr, String pStr) Constructor for the initial pass of an Algebraic function.
Initial(String nomEntriesStr, String pStr, String seedStr) Constructor for the initial pass of an Algebraic function.

Method Summary

Modifier and Type	Method and Description
org.apache.pig.data.Tuple	exec(org.apache.pig.data.Tuple inputTuple)

Methods inherited from class org.apache.pig.EvalFunc

allowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, outputSchema, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Initial

public Initial()

Default constructor to make pig validation happy.

Initial

public Initial(String nomEntriesStr)

Constructor for the initial pass of an Algebraic function. Pig will call this and pass the same constructor arguments as the original UDF. In this case the arguments are ignored.

Parameters:

nomEntriesStr - See Nominal Entries.

Initial

public Initial(String nomEntriesStr,
               String pStr)

Constructor for the initial pass of an Algebraic function. Pig will call this and pass the same constructor arguments as the original UDF. In this case the arguments are ignored.

Parameters:

nomEntriesStr - See Nominal Entries.

pStr - See Sampling Probability, p.

Initial

public Initial(String nomEntriesStr,
               String pStr,
               String seedStr)

Constructor for the initial pass of an Algebraic function. Pig will call this and pass the same constructor arguments as the original UDF. In this case the arguments are ignored.

Parameters:

nomEntriesStr - See Nominal Entries.

pStr - See Sampling Probability, p.

seedStr - See Update Hash Seed.

Method Detail

exec

public org.apache.pig.data.Tuple exec(org.apache.pig.data.Tuple inputTuple)
                               throws IOException

Specified by:

exec in class org.apache.pig.EvalFunc<org.apache.pig.data.Tuple>

Throws:

IOException