Class Utils

java.lang.Object

parser.methods.ext.Utils

public final class Utils
extends Object

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
static void	checkAtLeastArgs(String name, int count, List tokens)	helper method to unify argument check on standart functions
static boolean	checkOnlyNumbers(List<String> tokens)
static void	checkTokensCount(String title, int expected, List tokens)
static String	connectTokens(List<String> tokens)
static int[]	decimalAndFractionalParts(String s)
static int[]	decimalAndFractionalParts(BigDecimal bd)
static List<BigDecimal>	evaluateSingleToken(List<String> tokens)	This is method, which allows the client functions to workaround the https://github.com/gbenroscience/ParserNG/issues/25 Once the issue is fixed, this method will simply change to convert list of strings to list of big decimals withot any evaluations
static int	getFirstBigDeciamalTokenAsInt(List<BigDecimal> tokens)
static int	getFirstStringTokenAsInt(List<String> tokens)
static BigDecimal	gsum(List<BigDecimal> l)
static List<BigDecimal>	stringsToBigDecimals(List<String> tokens)	Converts list of strings to list of big decimals
static List<BigDecimal>	stringsToBigDecimals(List<String> tokens, int headCut)	Converts list of strings to list of big decimals, and custs first
static BigDecimal	sum(List<BigDecimal> l)
static List<BigDecimal>	tokensToNumbers(List<String> tokens)
static List<?>	trimList(List<?> tokens, int toRemove, int minLength)	Will remove toRemove elements from BOTH sides of tokens, leaving at least minLength of elements in place.

Methods inherited from class Object

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

Constructor Details

Utils

public Utils()

Method Details

stringsToBigDecimals

public static List<BigDecimal> stringsToBigDecimals(List<String> tokens)

Converts list of strings to list of big decimals

stringsToBigDecimals

public static List<BigDecimal> stringsToBigDecimals(List<String> tokens,
 int headCut)

Converts list of strings to list of big decimals, and custs first

Parameters:

headCut - members to cut of frombthebegining

trimList

public static List<?> trimList(List<?> tokens,
 int toRemove,
 int minLength)

Will remove toRemove elements from BOTH sides of tokens, leaving at least minLength of elements in place. It always take from both sides, or nto at all

sum

public static BigDecimal sum(List<BigDecimal> l)

Returns:

the sum of all elements in the data set with BigDecimal precission

gsum

public static BigDecimal gsum(List<BigDecimal> l)

Returns:

the geomethrical (multiplied) sum of all elements in the data set

getFirstBigDeciamalTokenAsInt

public static int getFirstBigDeciamalTokenAsInt(List<BigDecimal> tokens)

getFirstStringTokenAsInt

public static int getFirstStringTokenAsInt(List<String> tokens)

checkOnlyNumbers

public static boolean checkOnlyNumbers(List<String> tokens)

evaluateSingleToken

public static List<BigDecimal> evaluateSingleToken(List<String> tokens)

This is method, which allows the client functions to workaround the https://github.com/gbenroscience/ParserNG/issues/25 Once the issue is fixed, this method will simply change to convert list of strings to list of big decimals withot any evaluations

Parameters:

tokens - list of numbers or parts of mathematical expresion

Returns:

the converted numbers or evaluated expression as number.

tokensToNumbers

public static List<BigDecimal> tokensToNumbers(List<String> tokens)

connectTokens

public static String connectTokens(List<String> tokens)

checkAtLeastArgs

public static void checkAtLeastArgs(String name,
 int count,
 List tokens)
                             throws RuntimeException

helper method to unify argument check on standart functions

Parameters:

name -

count -

tokens -

Throws:

RuntimeException

decimalAndFractionalParts

public static int[] decimalAndFractionalParts(String s)

decimalAndFractionalParts

public static int[] decimalAndFractionalParts(BigDecimal bd)

checkTokensCount

public static void checkTokensCount(String title,
 int expected,
 List tokens)