net.starschema.java.util.DecimalFormatUtil Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of informata-datafile Show documentation

Maven Package for datafile.sourceforge.net Java data file read/write utility that provides a convenient set of interfaces for reading and writing data to and from files in widely accepted format such as comma separated values (CSV), fixed width, tab separated, as well as others.

The newest version!

/*
 * (C) 2015 Starschema
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package net.starschema.java.util;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;

/**
 * Helper class for handling local-dependent decimal formats.
 *
 * Mainly useful for testing.
 */
public class DecimalFormatUtil {
    /** Creates a new DecimalFormat using comming dot as a separator so local
     * decimal serparators dont matter
     * @param pattern   The pattern to use
     * @return  A new DecimalFormat with the dot as separator
     */
    public static DecimalFormat createDecimalFormat(final String pattern) {
        return createDecimalFormat(pattern, '.');
    }

    /**
     * Generic function to create a decimalformat with a specified decimal separator.
     */
    public static DecimalFormat createDecimalFormat(final String pattern, final char decimalSeparator) {
        DecimalFormatSymbols custom=new DecimalFormatSymbols();
        custom.setDecimalSeparator(decimalSeparator);
        DecimalFormat format = new DecimalFormat(pattern);
        format.setDecimalFormatSymbols(custom);
        return format;
    }

    /** Shortcut to get the decimal separator for tests. */
    public static char getDecimalSeparator() {
        DecimalFormatSymbols custom=new DecimalFormatSymbols();
        return custom.getDecimalSeparator();
    }

    public static String getDecimalFormatted(String englishFormat)
    {
        final char decimalSep = getDecimalSeparator();
        final String wrapStr = decimalSep == ',' ? "\"" : "";
        return wrapStr + englishFormat.replace('.', decimalSep) + wrapStr;
    }

    public static String getDecimalFormattedNoQuote(String englishFormat)
    {
        return  englishFormat.replace('.', getDecimalSeparator());
    }
}