Re: Dynamic Converter

["fisher.yu" <us...@gmail.com>]

My solution is use costomized Converter to read the timezone from parameter.
Hope it useful ^^

                <h:outputText value="#{var.item.createDatetime}"
id="ticketCreateDate" >
                	<f:converter
converterId="com.yinhoo.ers.jsf.converter.dateConverter" />
                	<f:attribute name="dateStyle" value="yyyy-MM-dd HH:mm:ss"/>
                	<f:attribute name="timeZone"
value="#{userBean.timeZoneId}"/>
                    <%/*<f:convertDateTime pattern="yyyy-MM-dd HH:mm:ss"
timeZone="#{userBean.timeZone}"/>*/%>
                </h:outputText>



public class DateConverter implements Converter {
	private static final String CUSTOM_FORMAT_PARAMETER_NAME = "dateStyle";
	private static final String TIME_ZONE_PARAMETER_NAME = "timeZone";

	private static final String DEFAULT_STYLE = "yyyy-MM-dd";

	private String format;
	
	private TimeZone tz;

	public Object getAsObject(FacesContext context, UIComponent component,
			String arg2) throws ConverterException {
		Date date = null;
		setFormat(component);
		SimpleDateFormat df = this.getFormater();
		try {
			date = df.parse(arg2);
		} catch (ParseException e) {
			throw new ConverterException("Not a valid date format");
		}
		return date;
	}

	private SimpleDateFormat getFormater() {
		SimpleDateFormat df = new SimpleDateFormat(format);
		if(tz!=null) {
			df.setTimeZone(tz);
		}
		return df;
	}

	@SuppressWarnings("unchecked")
	private void setFormat(UIComponent component) {
		Object styleAttribute = component.getAttributes().get(
				CUSTOM_FORMAT_PARAMETER_NAME);
		Object timeZoneAttr =
component.getAttributes().get(TIME_ZONE_PARAMETER_NAME);
		if(timeZoneAttr!=null) {
			this.tz = TimeZone.getTimeZone((String)timeZoneAttr);
		}
		if (styleAttribute == null) {
			this.format = DEFAULT_STYLE;
		} else {
			this.format = (String) styleAttribute;
		}
	}

	public String getAsString(FacesContext arg0, UIComponent component,
			Object arg2) throws ConverterException {
		Date date = null;
		setFormat(component);
		try {
			date = (Date) arg2;
		} catch (Exception e) {
			throw new ConverterException("Not a valid date format");
		}
		SimpleDateFormat df = this.getFormater();
		String dateString = df.format(date);
		return dateString;
	}

}
:handshake::handshake::handshake:
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