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

java.lang.Object
  org.apache.hadoop.hive.ql.udf.generic.GenericUDFUtils

public final class GenericUDFUtils
extends Object

Util functions for GenericUDF classes.

Nested Class Summary

static class	GenericUDFUtils.ConversionHelper Convert parameters for the method if needed.
static class	GenericUDFUtils.ReturnObjectInspectorResolver This class helps to find the return ObjectInspector for a GenericUDF.
static class	GenericUDFUtils.StringHelper Helper class for UDFs returning string/varchar/char

Method Summary

static int	findText(org.apache.hadoop.io.Text text, org.apache.hadoop.io.Text subtext, int start) Finds any occurence of subtext from text in the backing buffer, for avoiding string encoding and decoding.
static String	getOrdinal(int i) Return an ordinal from an integer.
static boolean	isUtfStartByte(byte b) Checks if b is the first byte of a UTF-8 character.

Methods inherited from class java.lang.Object

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

Method Detail

isUtfStartByte

public static boolean isUtfStartByte(byte b)

Checks if b is the first byte of a UTF-8 character.

getOrdinal

public static String getOrdinal(int i)

Return an ordinal from an integer.

findText

public static int findText(org.apache.hadoop.io.Text text,
                           org.apache.hadoop.io.Text subtext,
                           int start)

Finds any occurence of subtext from text in the backing buffer, for avoiding string encoding and decoding. Shamelessly copy from Text.find(String, int).