Package org.apache.druid.java.util.common.parsers

Class ParserUtils

java.lang.Object

org.apache.druid.java.util.common.parsers.ParserUtils

public class ParserUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
ParserUtils()

Method Summary

Modifier and Type	Method	Description
static ArrayList<String>	generateFieldNames(int length)
static org.joda.time.DateTimeZone	getDateTimeZone(String timeZone)
static String	getDefaultColumnName(int ordinal)	Return a function to generate default column names.
static com.google.common.base.Function<String,Object>	getTransformationFunction(String listDelimiter, com.google.common.base.Splitter listSplitter, boolean tryParseNumbers)
static String	stripQuotes(String input)
static void	validateFields(Iterable<String> fieldNames)

Methods inherited from class java.lang.Object

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

Constructor Detail

ParserUtils

public ParserUtils()

Method Detail

getTransformationFunction

public static com.google.common.base.Function<String,Object> getTransformationFunction(String listDelimiter,
                                                                                             com.google.common.base.Splitter listSplitter,
                                                                                             boolean tryParseNumbers)

Returns:

a transformation function on an input value. The function performs the following transformations on the input string:

Splits it into multiple values using the listSplitter if the list delimiter is present in the input.

If tryParseNumbers is true, the function will also attempt to parse any numeric values present in the input: integers as Long and floating-point numbers as Double. If the input is not a number or parsing fails, the input is returned as-is as a string.

generateFieldNames

public static ArrayList<String> generateFieldNames(int length)

validateFields

public static void validateFields(Iterable<String> fieldNames)

stripQuotes

public static String stripQuotes(String input)

getDateTimeZone

@Nullable
public static org.joda.time.DateTimeZone getDateTimeZone(String timeZone)

getDefaultColumnName

public static String getDefaultColumnName(int ordinal)

Return a function to generate default column names. Note that the postfix for default column names starts from 1.

Returns:

column name generating function