io.github.osamabmaq.tafqeetj.converters.NumberToThreeDigitsNumberGroupsDivider Maven / Gradle / Ivy

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A Java library to convert numbers from digital format to words format in Arabic language.

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package io.github.osamabmaq.tafqeetj.converters;

import io.github.osamabmaq.tafqeetj.numbers.ThreeDigitsNumber;
import io.github.osamabmaq.tafqeetj.numbers.NumberSign;

import java.util.*;

public class NumberToThreeDigitsNumberGroupsDivider {
    private static final List groupsNames = List.of(
            "basicNumberGroup", "thousands", "millions", "billions", "trillions"
    );

    public Map divide(long number) {
        List numbersGroups = getThreeDigitsNumberList(
                Long.toString(Math.abs(number)),
                NumberSign.signOf(number)
        );
        return mapWithGroupsNames(numbersGroups);
    }

    private List getThreeDigitsNumberList(String number, NumberSign sign) {
        List numbersGroups = new ArrayList<>();
        for (int i = number.length(), k = i - 3; i > 0; k = i - 3) {
            if (k < 0)
                k = 0;
            numbersGroups.add(createThreeDigitsNumberOf(number.substring(k, i), sign));
            i -= 3;
        }
        return numbersGroups;
    }

    private ThreeDigitsNumber createThreeDigitsNumberOf(String number, NumberSign sign) {
        return ThreeDigitsNumber.of(Integer.parseInt(number), sign);
    }

    private Map mapWithGroupsNames(List numbersGroups) {
        Map numbersGroupsMap = new HashMap<>();
        for (int i = 0; i < numbersGroups.size(); i++)
            numbersGroupsMap.put(groupsNames.get(i), numbersGroups.get(i));
        return Collections.unmodifiableMap(numbersGroupsMap);
    }
}