org.apache.hadoop.hive.ql.udf.generic

Class AbstractGenericUDFArrayBase

java.lang.Object

org.apache.hadoop.hive.ql.udf.generic.GenericUDF

org.apache.hadoop.hive.ql.udf.generic.AbstractGenericUDFArrayBase

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

GenericUDFArrayDistinct, GenericUDFArrayExcept, GenericUDFArrayIntersect, GenericUDFArrayJoin, GenericUDFArrayMax, GenericUDFArrayMin, GenericUDFArrayRemove, GenericUDFArraySlice, GenericUDFArrayUnion

public abstract class AbstractGenericUDFArrayBase
extends GenericUDF

Abstract GenericUDF for array functions

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

GenericUDF.DeferredJavaObject, GenericUDF.DeferredObject

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractGenericUDFArrayBase(String functionName, int minArgCount, int maxArgCount, ObjectInspector.Category outputCategory)

Method Summary

Modifier and Type	Method and Description
String	getDisplayString(String[] children) Get the String to be displayed in explain.
ObjectInspector	initialize(ObjectInspector[] arguments) Initialize this GenericUDF.

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

adapt, checkArgGroups, checkArgPrimitive, checkArgsSize, close, configure, copyToNewInstance, evaluate, flip, getArgOrder, getConstantBooleanValue, getConstantIntValue, getConstantStringValue, getDateValue, getDoubleValue, getFuncName, getIntervalDayTimeValue, getIntervalYearMonthValue, getIntValue, getLongValue, getRequiredFiles, getRequiredJars, getStandardDisplayString, getStandardDisplayString, getStringValue, getTimestampValue, getUdfName, initializeAndFoldConstants, negative, obtainDateConverter, obtainDoubleConverter, obtainIntConverter, obtainLongConverter, obtainStringConverter, obtainTimestampConverter

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractGenericUDFArrayBase

protected AbstractGenericUDFArrayBase(String functionName,
                                      int minArgCount,
                                      int maxArgCount,
                                      ObjectInspector.Category outputCategory)

Method Detail

initialize

public ObjectInspector initialize(ObjectInspector[] arguments)
                           throws UDFArgumentException

Description copied from class: GenericUDF

Initialize this GenericUDF. This will be called once and only once per GenericUDF instance.

Specified by:

initialize in class GenericUDF

Parameters:

arguments - The ObjectInspector for the arguments

Returns:

The ObjectInspector for the return value

Throws:

UDFArgumentException - Thrown when arguments have wrong types, wrong length, etc.

getDisplayString

public String getDisplayString(String[] children)

Description copied from class: GenericUDF

Get the String to be displayed in explain.

Specified by:

getDisplayString in class GenericUDF