Package com.martiansoftware.jsap.stringparsers

Class LongSizeStringParser

java.lang.Object

com.martiansoftware.jsap.StringParser

com.martiansoftware.jsap.stringparsers.LongSizeStringParser

public class LongSizeStringParser
extends StringParser

A StringParser that lets the user specify sizes with an optional unit.

This parser will parse its argument using parseSize(CharSequence).

Author:

Sebastiano Vigna

See Also:

IntSizeStringParser

Method Summary

Modifier and Type	Method	Description
static LongSizeStringParser	getParser()	Returns the only instance of a LongSizeStringParser.
Object	parse(String arg)	Parses the specified argument into an Object of the appropriate type.
static long	parseSize(CharSequence s)	Parses a size specified using units (e.g., K, Ki, M, Mi,…).

Methods inherited from class com.martiansoftware.jsap.StringParser

setUp, tearDown

Methods inherited from class java.lang.Object

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

Method Detail

getParser

public static LongSizeStringParser getParser()

Returns the only instance of a LongSizeStringParser.

Convenient access to the only instance returned by this method is available through JSAP.LONGSIZE_PARSER.

Returns:

the only instance of a LongSizeStringParser.

parse

public Object parse(String arg)
             throws ParseException

Description copied from class: StringParser

Parses the specified argument into an Object of the appropriate type. If the specified argument cannot be converted into the desired Object, a ParseException should be thrown.

Note: this method MAY BE CALLED with a null argument. Take this into consideration when subclassing!

Specified by:

parse in class StringParser

Parameters:

arg - the argument to convert to an Object of class appropriate to the StringParser subclass.

Returns:

the Object resulting from the parsed argument.

Throws:

ParseException - if the specified argument cannot be parsed.

parseSize

public static long parseSize(CharSequence s)
                      throws ParseException

Parses a size specified using units (e.g., K, Ki, M, Mi,…).

The argument must be in the form number [unit] (with no space inbetween). number is anything accepted by Long.decode(java.lang.String), which allows, besides decimal numbers, hexadecimal numbers prefixed by 0x, 0X or #, and octal numbers prefixed by 0. unit may be one of K (10³), Ki (2¹⁰), M (10⁶), Mi (2²⁰), G (10⁹), Gi (2³⁰), T (10¹²), Ti (2⁴⁰), P (10¹⁵), Pi (2⁵⁰). Thus, for instance, 1Ki is 1024, whereas 9M is nine millions and 0x10Pi is 18014398509481984. Note that in the number part case does not matter, but in the unit part it does.

Parameters:

s - a size specified as above.

Returns:

the corresponding unitless size.

Throws:

ParseException - if s is malformed, number is negative or the resulting size is larger than Long.MAX_VALUE.