javafx.util.converter.NumberStringConverter Maven / Gradle / Ivy
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* published by the Free Software Foundation. Oracle designates this
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* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package javafx.util.converter;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
import javafx.util.StringConverter;
/**
* A {@link StringConverter} implementation for {@link Number} values. Instances of this class are immutable.
*
* @since JavaFX 2.1
*/
public class NumberStringConverter extends StringConverter {
final Locale locale;
final String pattern;
final NumberFormat numberFormat;
/**
* Constructs a {@code NumberStringConverter} with the default locale and format.
*/
public NumberStringConverter() {
this(Locale.getDefault());
}
/**
* Constructs a {@code NumberStringConverter} with the given locale and the default format.
*
* @param locale the locale used in determining the number format used to format the string
*/
public NumberStringConverter(Locale locale) {
this(locale, null);
}
/**
* Constructs a {@code NumberStringConverter} with the default locale and the given decimal format pattern.
*
* @param pattern the string pattern used in determining the number format used to format the string
*
* @see java.text.DecimalFormat
*/
public NumberStringConverter(String pattern) {
this(Locale.getDefault(), pattern);
}
/**
* Constructs a {@code NumberStringConverter} with the given locale and decimal format pattern.
*
* @param locale the locale used in determining the number format used to format the string
* @param pattern the string pattern used in determining the number format used to format the string
*
* @see java.text.DecimalFormat
*/
public NumberStringConverter(Locale locale, String pattern) {
this(locale, pattern, null);
}
/**
* Constructs a {@code NumberStringConverter} with the given number format.
*
* @param numberFormat the number format used to format the string
*/
public NumberStringConverter(NumberFormat numberFormat) {
this(null, null, numberFormat);
}
NumberStringConverter(Locale locale, String pattern, NumberFormat numberFormat) {
this.locale = locale;
this.pattern = pattern;
this.numberFormat = numberFormat;
}
/** {@inheritDoc} */
@Override public Number fromString(String value) {
try {
// If the specified value is null or zero-length, return null
if (value == null) {
return null;
}
value = value.trim();
if (value.length() < 1) {
return null;
}
// Create and configure the parser to be used
NumberFormat parser = getNumberFormat();
// Perform the requested parsing
return parser.parse(value);
} catch (ParseException ex) {
throw new RuntimeException(ex);
}
}
/** {@inheritDoc} */
@Override public String toString(Number value) {
// If the specified value is null, return a zero-length String
if (value == null) {
return "";
}
// Create and configure the formatter to be used
NumberFormat formatter = getNumberFormat();
// Perform the requested formatting
return formatter.format(value);
}
/**
* Returns a {@code NumberFormat} instance to use for formatting
* and parsing in this {@code StringConverter}.
*
* @return a {@code NumberFormat} instance for formatting and parsing in this
* {@code StringConverter}
* @deprecated This method was exposed erroneously and will be removed in a future version.
*/
@Deprecated(forRemoval = true, since = "22")
protected NumberFormat getNumberFormat() {
Locale _locale = locale == null ? Locale.getDefault() : locale;
if (numberFormat != null) {
return numberFormat;
} else if (pattern != null) {
DecimalFormatSymbols symbols = new DecimalFormatSymbols(_locale);
return new DecimalFormat(pattern, symbols);
} else {
return NumberFormat.getNumberInstance(_locale);
}
}
}