de.gsi.chart.utils.MemorySizeStringConverter Maven / Gradle / Ivy

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This charting library ${project.artifactId}- is an extension in the spirit of Oracle's XYChart and performance/time-proven JDataViewer charting functionalities. Emphasis was put on plotting performance for both large number of data points and real-time displays, as well as scientific accuracies leading to error bar/surface plots, and other scientific plotting features (parameter measurements, fitting, multiple axes, zoom, ...).

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/*****************************************************************************
 *                                                                           *
 * 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