Package org.apache.flink.types.parser

Class DoubleParser

java.lang.Object

org.apache.flink.types.parser.FieldParser<Double>

org.apache.flink.types.parser.DoubleParser

@PublicEvolving
public class DoubleParser
extends FieldParser<Double>

Parses a text field into a Double.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.types.parser.FieldParser

FieldParser.ParseErrorState

Constructor Summary

Constructors

Constructor	Description
DoubleParser()

Method Summary

Modifier and Type	Method	Description
Double	createValue()	Returns an instance of the parsed value type.
Double	getLastResult()	Gets the parsed field.
static double	parseField(byte[] bytes, int startPos, int length)	Static utility to parse a field of type double from a byte sequence that represents text characters (such as when read from a file stream).
int	parseField(byte[] bytes, int startPos, int limit, byte[] delimiter, Double reusable)	Each parser's logic should be implemented inside this method
static double	parseField(byte[] bytes, int startPos, int length, char delimiter)	Static utility to parse a field of type double from a byte sequence that represents text characters (such as when read from a file stream).

Methods inherited from class org.apache.flink.types.parser.FieldParser

delimiterNext, endsWithDelimiter, getCharset, getErrorState, getParserForType, nextStringEndPos, nextStringLength, resetErrorStateAndParse, resetParserState, setCharset, setErrorState

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleParser

public DoubleParser()

Method Detail

parseField

public int parseField(byte[] bytes,
                      int startPos,
                      int limit,
                      byte[] delimiter,
                      Double reusable)

Description copied from class: FieldParser

Each parser's logic should be implemented inside this method

Specified by:

parseField in class FieldParser<Double>

createValue

public Double createValue()

Description copied from class: FieldParser

Returns an instance of the parsed value type.

Specified by:

createValue in class FieldParser<Double>

Returns:

An instance of the parsed value type.

getLastResult

public Double getLastResult()

Description copied from class: FieldParser

Gets the parsed field. This method returns the value parsed by the last successful invocation of FieldParser.parseField(byte[], int, int, byte[], Object). It objects are mutable and reused, it will return the object instance that was passed the parse function.

Specified by:

getLastResult in class FieldParser<Double>

Returns:

The latest parsed field.

parseField

public static final double parseField(byte[] bytes,
                                      int startPos,
                                      int length)

Static utility to parse a field of type double from a byte sequence that represents text characters (such as when read from a file stream).

Parameters:

bytes - The bytes containing the text data that should be parsed.

startPos - The offset to start the parsing.

length - The length of the byte sequence (counting from the offset).

Returns:

The parsed value.

Throws:

IllegalArgumentException - Thrown when the value cannot be parsed because the text represents not a correct number.

parseField

public static final double parseField(byte[] bytes,
                                      int startPos,
                                      int length,
                                      char delimiter)

Static utility to parse a field of type double from a byte sequence that represents text characters (such as when read from a file stream).

Parameters:

bytes - The bytes containing the text data that should be parsed.

startPos - The offset to start the parsing.

length - The length of the byte sequence (counting from the offset).

delimiter - The delimiter that terminates the field.

Returns:

The parsed value.

Throws:

IllegalArgumentException - Thrown when the value cannot be parsed because the text represents not a correct number.