velox.api.layer1.utils

Class PriceRangeCalculationHelper

java.lang.Object

velox.api.layer1.utils.PriceRangeCalculationHelper

public class PriceRangeCalculationHelper
extends java.lang.Object

Provides implementations of price range calculation

Field Summary

Fields

Modifier and Type	Field and Description
private static double	EPS
static int	MAX_NEGATIVE_PRICES_STEPS_MULTIPLIER_POWER
static int	MAX_POSITIVE_PRICES_STEPS_MULTIPLIER_POWER
static int[]	PRICES_STEPS_MULTIPLIERS
private static double[]	pricesSteps

Constructor Summary

Constructors

Constructor and Description
PriceRangeCalculationHelper()

Method Summary

Modifier and Type	Method and Description
private static void	calculateAvailablePricesSteps()
private static java.lang.String	formatPriceNumber(double value, int priceStepIndex) Rounds integer numbers, format double values
private static CalculatePricesResult	getCalculatePricesResultOrNull(int goodNumberStep, int startingLine, double minValue, double maxValue, double linesAtScreen)
static Layer1PriceAxisRangeCalculatable.ResultPriceAxisInfo	getGoodNumbersCalculation(double minValue, double maxValue, double linesCount) Provides an implementation of price range calculation that displays only "good" numbers on axis (1, 2, 5, 10, 25, 50 * 10^2n and their multipliers)
static java.util.Map<java.lang.String,Layer1PriceAxisRangeCalculatable.ResultPriceAxisInfo>	getGoodNumbersCalculation(double linesCount, java.util.Map<java.lang.String,Layer1PriceAxisRangeCalculatable.InputPriceAxisInfo> inputInfo) Invokes getGoodNumbersCalculation(double, double, double) for every map entry
static CalculatePricesResult	getGoodNumbersPriceResult(double minValue, double maxValue, double linesCount) Same as getGoodNumbersCalculation(double, double, double), different return type You don't need to use this method unless you want to see advanced parameters of best solution

Methods inherited from class java.lang.Object

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

Field Detail

EPS

private static final double EPS

See Also:

Constant Field Values

PRICES_STEPS_MULTIPLIERS

public static final int[] PRICES_STEPS_MULTIPLIERS

MAX_POSITIVE_PRICES_STEPS_MULTIPLIER_POWER

public static final int MAX_POSITIVE_PRICES_STEPS_MULTIPLIER_POWER

See Also:

Constant Field Values

MAX_NEGATIVE_PRICES_STEPS_MULTIPLIER_POWER

public static final int MAX_NEGATIVE_PRICES_STEPS_MULTIPLIER_POWER

See Also:

Constant Field Values

pricesSteps

private static double[] pricesSteps

Constructor Detail

PriceRangeCalculationHelper

public PriceRangeCalculationHelper()

Method Detail

calculateAvailablePricesSteps

private static void calculateAvailablePricesSteps()

getGoodNumbersCalculation

public static Layer1PriceAxisRangeCalculatable.ResultPriceAxisInfo getGoodNumbersCalculation(double minValue,
                                                                                             double maxValue,
                                                                                             double linesCount)

Provides an implementation of price range calculation that displays only "good" numbers on axis (1, 2, 5, 10, 25, 50 * 10^2n and their multipliers)

Parameters:

minValue - minimal value of indicator on chart range

maxValue - maximum value of indicator on chart range

linesCount - number of visible horizontal lines, that can display labels. Note that this value is double.
Value 2.3 will means 2 visible lines, and 3/10 of distance between lines as empty space to the top

Returns:

getGoodNumbersCalculation

public static java.util.Map<java.lang.String,Layer1PriceAxisRangeCalculatable.ResultPriceAxisInfo> getGoodNumbersCalculation(double linesCount,
                                                                                                                             java.util.Map<java.lang.String,Layer1PriceAxisRangeCalculatable.InputPriceAxisInfo> inputInfo)

Invokes getGoodNumbersCalculation(double, double, double) for every map entry

getGoodNumbersPriceResult

public static CalculatePricesResult getGoodNumbersPriceResult(double minValue,
                                                              double maxValue,
                                                              double linesCount)

Same as getGoodNumbersCalculation(double, double, double), different return type
You don't need to use this method unless you want to see advanced parameters of best solution

Parameters:

minValue - minimal value of indicator on chart range

maxValue - maximum value of indicator on chart range

linesCount - number of visible horizontal lines, that can display labels. Note that this value is double.
Value 2.3 will means 2 visible lines, and 3/10 of distance between lines as empty space to the top

Returns:

best calculated result or null if non was calculated

getCalculatePricesResultOrNull

private static CalculatePricesResult getCalculatePricesResultOrNull(int goodNumberStep,
                                                                    int startingLine,
                                                                    double minValue,
                                                                    double maxValue,
                                                                    double linesAtScreen)

Parameters:

goodNumberStep -

startingLine -

limits -

linesAtScreen -

formatPriceNumber

private static java.lang.String formatPriceNumber(double value,
                                                  int priceStepIndex)

Rounds integer numbers, format double values

Parameters:

value -

priceStepIndex -

Returns: