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FormatDateSupport.javaAPI DocGlassfish v2 API7331Sat May 05 19:17:52 BST 2007org.apache.taglibs.standard.tag.common.fmt

FormatDateSupport

public abstract class FormatDateSupport extends javax.servlet.jsp.tagext.TagSupport
Support for tag handlers for <formatDate>, the date and time formatting tag in JSTL 1.0.
author
Jan Luehe

Fields Summary
private static final String
DATE
private static final String
TIME
private static final String
DATETIME
protected Date
value
protected String
type
protected String
pattern
protected Object
timeZone
protected String
dateStyle
protected String
timeStyle
private String
var
private int
scope
Constructors Summary
public FormatDateSupport()

                           // 'scope' attribute


    //*********************************************************************
    // Constructor and initialization

      
	super();
	init();
Methods Summary
private java.text.DateFormatcreateFormatter(java.util.Locale loc)

	DateFormat formatter = null;

	if ((type == null) || DATE.equalsIgnoreCase(type)) {
	    formatter = DateFormat.getDateInstance(
	        Util.getStyle(dateStyle, "FORMAT_DATE_INVALID_DATE_STYLE"),
		loc);
	} else if (TIME.equalsIgnoreCase(type)) {
	    formatter = DateFormat.getTimeInstance(
	        Util.getStyle(timeStyle, "FORMAT_DATE_INVALID_TIME_STYLE"),
		loc);
	} else if (DATETIME.equalsIgnoreCase(type)) {
	    formatter = DateFormat.getDateTimeInstance(
	        Util.getStyle(dateStyle, "FORMAT_DATE_INVALID_DATE_STYLE"),
		Util.getStyle(timeStyle, "FORMAT_DATE_INVALID_TIME_STYLE"),
		loc);
	} else {
	    throw new JspException(
                    Resources.getMessage("FORMAT_DATE_INVALID_TYPE", 
					 type));
	}

	return formatter;
public intdoEndTag()


	String formatted = null;

	if (value == null) {
	    if (var != null) {
		pageContext.removeAttribute(var, scope);
	    }
	    return EVAL_PAGE;
	}

	// Create formatter
	Locale locale = SetLocaleSupport.getFormattingLocale(pageContext,
                                                             this,
                                                             true,
                                                             true);
	if (locale != null) {
	    DateFormat formatter = createFormatter(locale);

	    // Apply pattern, if present
	    if (pattern != null) {
		try {
		    ((SimpleDateFormat) formatter).applyPattern(pattern);
		} catch (ClassCastException cce) {
		    formatter = new SimpleDateFormat(pattern, locale);
		}
	    }

	    // Set time zone
	    TimeZone tz = null;
	    if ((timeZone instanceof String)
		&& ((String) timeZone).equals("")) {
		timeZone = null;
	    }
	    if (timeZone != null) {
		if (timeZone instanceof String) {
		    tz = TimeZone.getTimeZone((String) timeZone);
		} else if (timeZone instanceof TimeZone) {
		    tz = (TimeZone) timeZone;
		} else {
		    throw new JspTagException(
                            Resources.getMessage("FORMAT_DATE_BAD_TIMEZONE"));
		}
	    } else {
		tz = TimeZoneSupport.getTimeZone(pageContext, this);
	    }
	    if (tz != null) {
		formatter.setTimeZone(tz);
	    }
	    formatted = formatter.format(value);
	} else {
	    // no formatting locale available, use Date.toString()
	    formatted = value.toString();
	}

	if (var != null) {
	    pageContext.setAttribute(var, formatted, scope);	
	} else {
	    try {
		pageContext.getOut().print(formatted);
	    } catch (IOException ioe) {
		throw new JspTagException(ioe.toString(), ioe);
	    }
	}

	return EVAL_PAGE;
private voidinit()

	type = dateStyle = timeStyle = null;
	pattern = var = null;
	value = null;
	timeZone = null;
	scope = PageContext.PAGE_SCOPE;
public voidrelease()

	init();
public voidsetScope(java.lang.String scope)

	this.scope = Util.getScope(scope);
public voidsetVar(java.lang.String var)

        this.var = var;