edu.caltech.ipac.firefly.data.form.DecimalFieldDef.java Source code

Introduction

Here is the source code for edu.caltech.ipac.firefly.data.form.DecimalFieldDef.java

Source

/*
 * License information at https://github.com/Caltech-IPAC/firefly/blob/master/License.txt
 */
package edu.caltech.ipac.firefly.data.form;

import com.google.gwt.i18n.client.NumberFormat;
import edu.caltech.ipac.util.dd.RangeFieldDef;

/**
 * Field definition that allows float input
 * This code can be can be used on the server side except for the format() method.
 * That can only be call on the client side.
 * @version $Id: DecimalFieldDef.java,v 1.10 2011/02/24 23:43:41 roby Exp $
 */
public abstract class DecimalFieldDef extends RangeFieldDef {

    public static String DEFAULT_MASK = "[+-]?[0-9]*[.]?[0-9]+";

    private int precision = 2;
    private boolean sciNote = false;

    public DecimalFieldDef() {
    }

    public DecimalFieldDef(String name) {
        super(name);
    }

    public void setPrecision(int precision) {
        this.precision = precision;
    }

    public int getPrecision() {
        return precision;
    }

    public void setUseSciNotation(boolean use) {
        sciNote = use;
    }

    public boolean getUseSciNotation() {
        return sciNote;
    }

    /**
     * This method should only be call when running on the client side in GWT compiled code.
     * @param n the number to format
     * @return a string formatted version of the number
     */
    public String format(Number n) {
        return getNumberFormat().format(n.doubleValue());
    }

    private NumberFormat getNumberFormat() {
        NumberFormat nf;
        if (sciNote) {
            nf = NumberFormat.getScientificFormat();
        } else {
            StringBuffer sb = new StringBuffer(9);
            if (precision == 0) {
                nf = NumberFormat.getFormat("#");
            } else {
                sb.append("#.");
                for (int i = 0; (i < precision); i++)
                    sb.append("#");
                nf = NumberFormat.getFormat(sb.toString());
            }
        }
        return nf;
    }

    public abstract void setMinValue(Number min);

    public abstract Number getMinValue();

    public abstract void setMaxValue(Number min);

    public abstract Number getMaxValue();

    public String getDefaultMask() {
        return DEFAULT_MASK;
    }

    public double getDoubleValue(Object v) {
        if (v != null) {
            if (v instanceof Double) {
                return (Double) v;
            } else {
                return Double.parseDouble(v.toString());
            }
        }
        return Float.NaN;
    }

}