org.zkoss.bind.converter.FormatedNumberConverter Maven / Gradle / Ivy
/* FormatedNumberConverter.java
Purpose:
Description:
History:
Jun 22, 2011 11:22:20 AM, Created by henrichen
Copyright (C) 2011 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.bind.converter;
import java.io.Serializable;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import org.zkoss.bind.BindContext;
import org.zkoss.bind.Converter;
import org.zkoss.bind.sys.Binding;
import org.zkoss.util.Locales;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.UiException;
/**
* Converter to convert String to Number.
* @author henrichen
* @since 6.0.0
*/
public class FormatedNumberConverter implements Converter, Serializable {
private static final long serialVersionUID = 1463169907348730644L;
/**
* Convert Number to String.
* @param val number to be converted
* @param comp associated component
* @param ctx bind context for associate {@link Binding} and extra parameter (e.g. format)
* @return the converted String
*/
public Object coerceToUi(Object val, Component comp, BindContext ctx) {
//user sets format in annotation of binding or args when calling binder.addPropertyBinding()
final String formatPtn = (String) ctx.getConverterArg("format");
if (formatPtn == null)
throw new NullPointerException("format attribute not found");
return val == null ? null : getLocalizedDecimalFormat(formatPtn).format((Number) val);
}
/**
* Convert String to Number.
* @param val number in string form
* @param comp associated component
* @param ctx bind context for associate {@link Binding} and extra parameter (e.g. format)
* @return the converted Number
*/
public Object coerceToBean(Object val, Component comp, BindContext ctx) {
final String format = (String) ctx.getConverterArg("format");
if (format == null)
throw new NullPointerException("format attribute not found");
try {
return val == null ? null : getLocalizedDecimalFormat(format).parse((String) val);
} catch (ParseException e) {
throw UiException.Aide.wrap(e);
}
}
private static DecimalFormat getLocalizedDecimalFormat(String pattern) {
final DecimalFormat df = (DecimalFormat) NumberFormat.getInstance(Locales.getCurrent());
df.applyPattern(pattern);
return df;
}
}