de.gsi.chart.utils.MemorySizeStringConverter Maven / Gradle / Ivy
/*****************************************************************************
* *
* BI Common - convert Number <-> String *
* *
* modified: 2017-03-07 Harald Braeuning *
* *
****************************************************************************/
package de.gsi.chart.utils;
import java.text.DecimalFormat;
import javafx.util.StringConverter;
/**
*
* @author braeun
*/
public class MemorySizeStringConverter extends StringConverter {
public enum Unit { BEST, BYTE, KILOBYTE, MEGABYTE, GIGABYTE }
private int precision = 1;
private Unit unit = Unit.BEST;
private final DecimalFormat format = new DecimalFormat();
public MemorySizeStringConverter()
{
buildFormat(precision);
}
public MemorySizeStringConverter(Unit unit)
{
this.unit = unit;
buildFormat(precision);
}
public MemorySizeStringConverter(int precision)
{
this.precision = precision;
buildFormat(precision);
}
public MemorySizeStringConverter(Unit unit, int precision)
{
this.unit = unit;
this.precision = precision;
buildFormat(precision);
}
public int getPrecision()
{
return precision;
}
public void setPrecision(int precision)
{
this.precision = precision;
buildFormat(precision);
}
public Unit getUnit()
{
return unit;
}
public void setUnit(Unit unit)
{
this.unit = unit;
}
@Override
public String toString(Number object)
{
String u;
double v = object.doubleValue();
switch (unit) {
case BEST:
if (v < 1000) {
u = "B";
} else if (v < 1000000)
{
v /= 1000.0;
u = "kB";
}
else if (v < 1000000000)
{
v /= 1000000.0;
u = "MB";
}
else
{
v /= 1000000000.0;
u = "GB";
}
break;
case KILOBYTE:
v /= 1000.0;
u = "kB";
break;
case MEGABYTE:
v /= 1000000.0;
u = "MB";
break;
case GIGABYTE:
v /= 1000000000.0;
u = "GB";
break;
default:
case BYTE:
u = "B";
break;
}
return format.format(v) + u;
}
@Override
public Number fromString(String string)
{
throw new UnsupportedOperationException("Parsing memory size string not implemented yet");
// return Double.parseDouble(string);
}
private void buildFormat(int precision)
{
final StringBuilder sb = new StringBuilder(32);
sb.append("0.");
for (int i=0;i