83 lines
2.3 KiB
Java
83 lines
2.3 KiB
Java
package org.appledash.saneeconomy.utils;
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import com.google.common.base.Strings;
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import org.appledash.saneeconomy.economy.Currency;
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import java.math.BigDecimal;
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import java.text.DecimalFormat;
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import java.text.NumberFormat;
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import java.text.ParseException;
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/**
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* Created by AppleDash on 6/14/2016.
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* Blackjack is still best pony.
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*/
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public final class NumberUtils {
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private static final BigDecimal INVALID_DOUBLE = BigDecimal.ONE.negate();
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private NumberUtils() {
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}
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public static BigDecimal parsePositiveDouble(String sDouble) {
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if (Strings.isNullOrEmpty(sDouble)) {
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return INVALID_DOUBLE;
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}
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sDouble = sDouble.trim();
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if (sDouble.equalsIgnoreCase("nan") || sDouble.equalsIgnoreCase("infinity") || sDouble.equalsIgnoreCase("-infinity")) {
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return INVALID_DOUBLE;
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}
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BigDecimal doub;
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try {
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doub = (BigDecimal) constructDecimalFormat().parseObject(sDouble);
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} catch (ParseException | NumberFormatException e) {
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return INVALID_DOUBLE;
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}
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if (doub.compareTo(BigDecimal.ZERO) < 0) {
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return INVALID_DOUBLE;
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}
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/*if (Double.isInfinite(doub) || Double.isNaN(doub)) {
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return INVALID_DOUBLE;
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}*/
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return doub;
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}
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public static BigDecimal filterAmount(Currency currency, BigDecimal amount) {
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try {
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return (BigDecimal) constructDecimalFormat().parse(currency.getFormat().format(amount.abs()));
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} catch (ParseException e) {
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throw new NumberFormatException();
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}
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}
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public static BigDecimal parseAndFilter(Currency currency, String sDouble) {
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return filterAmount(currency, parsePositiveDouble(sDouble));
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}
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public static boolean equals(BigDecimal left, BigDecimal right) {
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if (left == null) {
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throw new NullPointerException("left == null");
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}
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if (right == null) {
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throw new NullPointerException("right == null");
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}
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return left.compareTo(right) == 0;
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}
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private static DecimalFormat constructDecimalFormat() {
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DecimalFormat decimalFormat = (DecimalFormat) NumberFormat.getInstance();
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decimalFormat.setParseBigDecimal(true);
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return decimalFormat;
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}
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}
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