guineu.util.NumberFormatter.java Source code

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Here is the source code for guineu.util.NumberFormatter.java

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/*
 * Copyright 2007-2013 VTT Biotechnology
 * This file is part of Guineu.
 *
 * Guineu is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * Guineu 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * Guineu; if not, write to the Free Software Foundation, Inc., 51 Franklin St,
 * Fifth Floor, Boston, MA 02110-1301 USA
 */
package guineu.util;

import java.text.DecimalFormat;
import java.text.FieldPosition;
import java.text.Format;
import java.text.NumberFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.TimeZone;

import org.dom4j.Element;

/**
 * @author Taken from MZmine2
 * http://mzmine.sourceforge.net/
 *
 * NumberFormat extension to provide both number-style and date-style
 * formatting, with XML import/export of format definition. This class is
 * synchronized, so it can be used by multiple threads.
 */
public class NumberFormatter extends NumberFormat implements Cloneable {

    public static final String TYPE_ELEMENT_NAME = "type";
    public static final String PATTERN_ELEMENT_NAME = "pattern";

    public enum FormatterType {

        TIME, NUMBER
    }

    private FormatterType embeddedFormatterType;
    private Format embeddedFormatter;

    public NumberFormatter(FormatterType type, String pattern) {
        setFormat(type, pattern);
    }

    public NumberFormatter(Element xmlElement) {
        importFromXML(xmlElement);
    }

    public void setFormat(FormatterType type, String pattern) {
        this.embeddedFormatterType = type;
        switch (type) {
        case TIME:
            SimpleDateFormat sdf = new SimpleDateFormat(pattern);
            // important for handling low values, otherwise in different time
            // zones we may get to negative numbers
            sdf.setTimeZone(TimeZone.getTimeZone("GMT+0:00"));
            embeddedFormatter = sdf;

            break;
        case NUMBER:
            embeddedFormatter = new DecimalFormat(pattern);
            break;
        }
    }

    public FormatterType getType() {
        return embeddedFormatterType;
    }

    public String getPattern() {
        switch (embeddedFormatterType) {
        case TIME:
            return ((SimpleDateFormat) embeddedFormatter).toPattern();
        case NUMBER:
            return ((DecimalFormat) embeddedFormatter).toPattern();
        }
        return null;
    }

    public void importFromXML(Element xmlElement) {
        String pattern = xmlElement.elementText(PATTERN_ELEMENT_NAME);
        FormatterType type = FormatterType.valueOf(xmlElement.elementText(TYPE_ELEMENT_NAME));
        setFormat(type, pattern);
    }

    public void exportToXML(Element xmlElement) {
        Element typeElement = xmlElement.addElement(TYPE_ELEMENT_NAME);
        typeElement.setText(embeddedFormatterType.toString());
        Element patternElement = xmlElement.addElement(PATTERN_ELEMENT_NAME);
        patternElement.setText(getPattern());
    }

    /**
     * @see java.text.NumberFormat#format(double, java.lang.StringBuffer,
     *      java.text.FieldPosition)
     */
    public synchronized StringBuffer format(double arg0, StringBuffer arg1, FieldPosition arg2) {

        // conversion to msec
        if (embeddedFormatterType == FormatterType.TIME) {
            arg0 *= 1000;
        }

        return embeddedFormatter.format(arg0, arg1, arg2);
    }

    /**
     */
    public synchronized StringBuffer format(Range range, StringBuffer arg1, FieldPosition arg2) {

        embeddedFormatter.format(range.getMin(), arg1, new FieldPosition(0));
        arg1.append(" - ");
        embeddedFormatter.format(range.getMax(), arg1, new FieldPosition(0));
        return arg1;
    }

    /**
     * @see java.text.NumberFormat#format(long, java.lang.StringBuffer,
     *      java.text.FieldPosition)
     */
    public synchronized StringBuffer format(long arg0, StringBuffer arg1, FieldPosition arg2) {

        // conversion to msec
        if (embeddedFormatterType == FormatterType.TIME) {
            arg0 *= 1000;
        }

        return embeddedFormatter.format(arg0, arg1, arg2);
    }

    /**
     * @see java.text.NumberFormat#parse(java.lang.String,
     *      java.text.ParsePosition)
     */
    public synchronized Number parse(String str, ParsePosition pos) {
        try {
            switch (embeddedFormatterType) {
            case TIME:
                SimpleDateFormat sdf = (SimpleDateFormat) embeddedFormatter;
                return ((sdf.parse(str, pos).getTime()) / 1000l);
            case NUMBER:
                DecimalFormat df = (DecimalFormat) embeddedFormatter;
                return df.parse(str, pos);
            }
        } catch (Exception e) {
        }
        return null;
    }

    /**
     * @see java.text.NumberFormat#clone()
     */
    public NumberFormatter clone() {
        return new NumberFormatter(embeddedFormatterType, getPattern());
    }
}