org.hyperic.util.units.UnitsFormat.java Source code

Introduction

Here is the source code for org.hyperic.util.units.UnitsFormat.java

Source

/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 * 
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 * 
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.hyperic.util.units;

import java.math.BigDecimal;
import java.text.ParseException;
import java.util.HashMap;
import java.util.Locale;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class UnitsFormat {
    private static final HashMap formatters;

    static {
        formatters = new HashMap();

        formatters.put(new Integer(UnitsConstants.UNIT_NONE), new NoFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_CURRENCY), new CurrencyFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_BYTES), new BytesFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_BITS), new BitRateFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_BYTES2BITS), new BytesToBitsFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_DURATION), new DurationFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_DATE), new DateFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_PERCENTAGE), new PercentageFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_PERCENT), new PercentFormatter());
        formatters.put(new Integer(UnitsConstants.UNIT_APPROX_DUR), new ApproxDurationFormatter());
    }

    private static Log log = LogFactory.getLog(UnitsFormat.class);

    public static FormattedNumber format(UnitNumber val) {
        return format(val, Locale.getDefault());
    }

    public static FormattedNumber format(UnitNumber val, Locale locale) {
        return format(val, locale, null);
    }

    private static Formatter getFormatter(int unitType) {
        Formatter res;

        res = (Formatter) formatters.get(new Integer(unitType));
        if (res == null) {
            throw new IllegalStateException("Unhandled unit type: " + unitType);
        }
        return res;
    }

    public static FormattedNumber format(UnitNumber val, Locale locale, FormatSpecifics specifics) {
        FormattedNumber res;
        Formatter formatter;

        formatter = getFormatter(val.getUnits());

        res = formatter.format(val, locale, specifics);
        if (log.isDebugEnabled()) {
            log.debug("format(" + val.getValue() + ") -> " + res);
        }
        return res;
    }

    public static FormattedNumber[] formatSame(double[] values, int unitType, int scale) {
        return formatSame(values, unitType, scale, Locale.getDefault());
    }

    public static FormattedNumber[] formatSame(double[] values, int unitType, int scale, Locale locale) {
        return (formatSame(values, unitType, scale, locale, null));
    }

    public static FormattedNumber[] formatSame(double[] values, int unitType, int scale, Locale locale,
            FormatSpecifics specifics) {
        FormattedNumber[] res;
        Formatter formatter;

        formatter = getFormatter(unitType);

        res = formatter.formatSame(values, unitType, scale, locale, specifics);

        if (log.isDebugEnabled()) {
            StringBuffer buf = new StringBuffer();

            buf.append("format({");
            for (int i = 0; i < values.length; i++) {
                buf.append(values[i]);
                if (i != values.length)
                    buf.append(", ");
            }
            buf.append("}) -> {");

            for (int i = 0; i < res.length; i++) {
                buf.append(res[i].toString());
                if (i != values.length)
                    buf.append(", ");
            }
            buf.append("}");

            log.debug(buf.toString());
        }
        return res;
    }

    static BigDecimal getBaseValue(double value, int unitType, int scale) {
        return getFormatter(unitType).getBaseValue(value, scale);
    }

    static BigDecimal getScaledValue(BigDecimal baseValue, int unitType, int scale) {
        return getFormatter(unitType).getScaledValue(baseValue, scale);
    }

    public static UnitNumber parse(String value, int unitType) throws ParseException {
        return parse(value, unitType, null);
    }

    public static UnitNumber parse(String value, int unitType, ParseSpecifics specifics) throws ParseException {
        return parse(value, unitType, Locale.getDefault(), specifics);
    }

    public static UnitNumber parse(String value, int unitType, Locale locale, ParseSpecifics specifics)
            throws ParseException {
        Formatter formatter;

        formatter = getFormatter(unitType);
        return formatter.parse(value, locale, specifics);
    }

    public static void main(String[] args) throws Exception {
        for (int i = 0; i < args.length; i++) {
            UnitNumber num = UnitsFormat.parse(args[i], UnitsConstants.UNIT_BYTES);

            System.out.println("Raw = " + num.getBaseValue());
            System.out.println("Fmt = " + UnitsFormat.format(num, Locale.getDefault()));

            System.out.println("Scaled to bytes = " + num.getScaledValue(UnitsConstants.SCALE_NONE));
            System.out.println("Scaled to kilo = " + num.getScaledValue(UnitsConstants.SCALE_KILO));
            System.out.println("Scaled to giga = " + num.getScaledValue(UnitsConstants.SCALE_GIGA));
        }
    }
}