/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation, and/or the GNU Lesser
* General Public License, version 2.1, also 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 and the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.rhq.core.clientapi.util.units;
import java.math.BigDecimal;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
import org.rhq.core.clientapi.util.ArrayUtil;
public abstract class BinaryFormatter implements Formatter {
private NumberFormat getSpecificFormatter(FormatSpecifics specifics, Locale locale) {
NumberFormat res = NumberFormat.getInstance(locale);
if (specifics.getPrecision() == FormatSpecifics.PRECISION_MAX) {
res.setMaximumFractionDigits(100);
res.setMinimumFractionDigits(0);
} else {
res.setMaximumFractionDigits(1);
res.setMinimumFractionDigits(1);
}
return res;
}
public FormattedNumber format(UnitNumber val, Locale locale, FormatSpecifics specifics) {
NumberFormat fmt;
BigDecimal baseVal;
double newVal;
ScaleConstants targScale;
baseVal = val.getBaseValue();
targScale = this.findGoodLookingScale(baseVal);
newVal = this.getTargetValue(baseVal, targScale);
if (specifics == null) {
fmt = UnitsUtil.getNumberFormat(new double[] { newVal }, locale);
} else {
fmt = this.getSpecificFormatter(specifics, locale);
}
return this.createFormattedValue(newVal, targScale, fmt);
}
public FormattedNumber[] formatSame(double[] vals, UnitsConstants unitType, ScaleConstants scale, Locale locale,
FormatSpecifics specifics) {
FormattedNumber[] res;
NumberFormat fmt;
UnitNumber tmpNum;
double[] newVals;
double average;
ScaleConstants targScale;
res = new FormattedNumber[vals.length];
if (vals.length == 0) {
return res;
}
average = ArrayUtil.average(vals);
tmpNum = new UnitNumber(average, unitType, scale);
targScale = this.findGoodLookingScale(tmpNum.getBaseValue());
newVals = new double[vals.length];
for (int i = 0; i < vals.length; i++) {
tmpNum = new UnitNumber(vals[i], unitType, scale);
newVals[i] = this.getTargetValue(tmpNum.getBaseValue(), targScale);
}
if (specifics == null) {
fmt = UnitsUtil.getNumberFormat(newVals, locale);
} else {
fmt = this.getSpecificFormatter(specifics, locale);
}
for (int i = 0; i < vals.length; i++) {
res[i] = this.createFormattedValue(newVals[i], targScale, fmt);
}
return res;
}
protected abstract String getTagName();
protected FormattedNumber createFormattedValue(double value, ScaleConstants scale, NumberFormat fmt) {
String tag;
switch (scale) {
case SCALE_NONE: {
tag = "";
break;
}
case SCALE_KILO: {
tag = "K";
break;
}
case SCALE_MEGA: {
tag = "M";
break;
}
case SCALE_GIGA: {
tag = "G";
break;
}
case SCALE_TERA: {
tag = "T";
break;
}
case SCALE_PETA: {
tag = "P";
break;
}
default: {
throw new IllegalStateException("Unhandled scale");
}
}
return new FormattedNumber(fmt.format(value), tag + this.getTagName());
}
private double getTargetValue(BigDecimal baseVal, ScaleConstants targetScale) {
BigDecimal modifier;
double lateModifier;
modifier = UnitsUtil.FACT_NONE;
lateModifier = 1.0;
switch (targetScale) {
case SCALE_KILO: {
lateModifier = 1 << 10;
break;
}
case SCALE_MEGA: {
lateModifier = 1 << 20;
break;
}
case SCALE_GIGA: {
modifier = UnitsUtil.FACT_MEGA_BIN;
lateModifier = 1 << 10;
break;
}
case SCALE_TERA: {
modifier = UnitsUtil.FACT_GIGA_BIN;
lateModifier = 1 << 10;
break;
}
case SCALE_PETA: {
modifier = UnitsUtil.FACT_TERA_BIN;
lateModifier = 1 << 10;
}
}
baseVal = baseVal.divide(modifier, BigDecimal.ROUND_HALF_EVEN);
return baseVal.doubleValue() / lateModifier;
}
private ScaleConstants findGoodLookingScale(BigDecimal val) {
if (val.compareTo(UnitsUtil.FACT_PETA_BIN) >= 1) {
return ScaleConstants.SCALE_PETA;
} else if (val.compareTo(UnitsUtil.FACT_TERA_BIN) >= 1) {
return ScaleConstants.SCALE_TERA;
} else if (val.compareTo(UnitsUtil.FACT_GIGA_BIN) >= 1) {
return ScaleConstants.SCALE_GIGA;
} else if (val.compareTo(UnitsUtil.FACT_MEGA_BIN) >= 1) {
return ScaleConstants.SCALE_MEGA;
} else if (val.compareTo(UnitsUtil.FACT_KILO_BIN) >= 1) {
return ScaleConstants.SCALE_KILO;
} else {
return ScaleConstants.SCALE_NONE;
}
}
public BigDecimal getBaseValue(double value, ScaleConstants scale) {
BigDecimal res;
res = new BigDecimal(value);
return res.multiply(this.getScaleCoeff(scale));
}
public BigDecimal getScaledValue(BigDecimal value, ScaleConstants targScale) {
return value.divide(this.getScaleCoeff(targScale), BigDecimal.ROUND_HALF_EVEN);
}
private BigDecimal getScaleCoeff(ScaleConstants scale) {
switch (scale) {
case SCALE_NONE: {
return UnitsUtil.FACT_NONE;
}
case SCALE_KILO: {
return UnitsUtil.FACT_KILO_BIN;
}
case SCALE_MEGA: {
return UnitsUtil.FACT_MEGA_BIN;
}
case SCALE_GIGA: {
return UnitsUtil.FACT_GIGA_BIN;
}
case SCALE_TERA: {
return UnitsUtil.FACT_TERA_BIN;
}
case SCALE_PETA: {
return UnitsUtil.FACT_PETA_BIN;
}
default: {
throw new IllegalArgumentException("Value did not have binary " + "based scale");
}
}
}
protected abstract UnitNumber parseTag(double number, String tag, int tagIdx, ParseSpecifics specifics)
throws ParseException;
public UnitNumber parse(String val, Locale locale, ParseSpecifics specifics) throws ParseException {
NumberFormat fmt = NumberFormat.getInstance(locale);
double numberPart;
int nonIdx;
nonIdx = UnitsUtil.findNonNumberIdx(val, fmt);
if (nonIdx == -1) {
throw new ParseException("Number had no units with it", val.length());
}
if (nonIdx == 0) {
throw new ParseException("Invalid number specified", 0);
}
numberPart = fmt.parse(val.substring(0, nonIdx)).doubleValue();
return this.parseTag(numberPart, val.substring(nonIdx, val.length()).trim(), nonIdx, specifics);
}
}