/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.myfaces.taglib.core;
import org.apache.myfaces.shared_impl.taglib.UIComponentELTagUtils;
import org.apache.myfaces.shared_impl.util.LocaleUtils;
import javax.el.ELContext;
import javax.el.ValueExpression;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.DateTimeConverter;
import javax.servlet.jsp.JspException;
import java.util.Locale;
import java.util.TimeZone;
/**
* @author Manfred Geiler (latest modification by $Author: skitching $)
* @version $Revision: 684465 $ $Date: 2008-08-10 07:38:21 -0400 (Sun, 10 Aug 2008) $
*/
public class ConvertDateTimeTag
extends ConverterTag
{
/**
* serial version id for correct serialisation versioning
*/
private static final long serialVersionUID = 54366768002181L;
private static final String DEFAULT_DATE_STYLE = "default";
private static final String DEFAULT_TIME_STYLE = "default";
private static final String TYPE_DATE = "date";
private static final String TYPE_TIME = "time";
private static final String TYPE_BOTH = "both";
private static final String DEFAULT_TYPE = TYPE_DATE;
private ValueExpression _dateStyle;
private ValueExpression _locale;
private ValueExpression _pattern;
private ValueExpression _timeStyle;
private ValueExpression _timeZone;
private ValueExpression _type;
private static final ValueExpression CONVERTER_ID;
static
{
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext != null)
{
CONVERTER_ID = facesContext.getApplication().getExpressionFactory().createValueExpression(
facesContext.getELContext(),"javax.faces.DateTime",String.class);
}
else
{
// Handle null facesContext because some tools (eg the tlddoc generator)
// load classes in order to introspect them. Of course this class will
// never work correctly in its normal JSF environment if this case is used.
CONVERTER_ID = null;
}
}
public void release()
{
super.release();
_dateStyle = null;
_locale = null;
_pattern = null;
_timeStyle = null;
_timeZone = null;
_type = null;
}
public void setDateStyle(ValueExpression dateStyle)
{
_dateStyle = dateStyle;
}
public void setLocale(ValueExpression locale)
{
_locale = locale;
}
public void setPattern(ValueExpression pattern)
{
_pattern = pattern;
}
public void setTimeStyle(ValueExpression timeStyle)
{
_timeStyle = timeStyle;
}
public void setTimeZone(ValueExpression timeZone)
{
_timeZone = timeZone;
}
public void setType(ValueExpression type)
{
_type = type;
}
public int doStartTag() throws JspException {
super.setConverterId(CONVERTER_ID);
return super.doStartTag();
}
protected Converter createConverter() throws JspException
{
DateTimeConverter converter = (DateTimeConverter)super.createConverter();
ELContext elContext = FacesContext.getCurrentInstance().getELContext();
setConverterDateStyle(elContext, converter, _dateStyle);
setConverterLocale(elContext, converter, _locale);
setConverterPattern(elContext, converter, _pattern);
setConverterTimeStyle(elContext, converter, _timeStyle);
setConverterTimeZone(elContext, converter, _timeZone);
setConverterType(elContext, converter, _type);
return converter;
}
private void setConverterLocale(ELContext eLContext,
DateTimeConverter converter,
ValueExpression value)
{
if (value == null) return;
Object objLocale = UIComponentELTagUtils.evaluateValueExpression(eLContext, value);
Locale locale;
if (objLocale == null) return;
if (objLocale instanceof Locale)
{
locale = (Locale) objLocale;
}
else
{
locale = LocaleUtils.toLocale(objLocale.toString());
}
converter.setLocale(locale);
}
private void setConverterDateStyle(ELContext elContext,
DateTimeConverter converter,
ValueExpression value)
{
if (value == null) return;
String dateStyle = (String) UIComponentELTagUtils.evaluateValueExpression(elContext, value);
if (dateStyle == null)
{
dateStyle = DEFAULT_DATE_STYLE;
}
converter.setDateStyle(dateStyle);
}
private void setConverterPattern(ELContext elContext,
DateTimeConverter converter,
ValueExpression value)
{
if (value == null) return;
String pattern = (String) UIComponentELTagUtils.evaluateValueExpression(elContext, value);
converter.setPattern(pattern);
}
private void setConverterTimeStyle(ELContext elContext,
DateTimeConverter converter,
ValueExpression value)
{
if (value == null) return;
String timeStyle = (String) UIComponentELTagUtils.evaluateValueExpression(elContext, value);
if (timeStyle == null)
{
timeStyle = DEFAULT_TIME_STYLE;
}
converter.setTimeStyle(timeStyle);
}
private void setConverterTimeZone(ELContext elContext,
DateTimeConverter converter,
ValueExpression value)
{
if (value == null) return;
Object objTimeZone = UIComponentELTagUtils.evaluateValueExpression(elContext, value);
TimeZone timeZone;
if (objTimeZone == null) return;
if (objTimeZone instanceof TimeZone)
{
timeZone = (TimeZone) objTimeZone;
}
else
{
timeZone = TimeZone.getTimeZone(objTimeZone.toString());
}
converter.setTimeZone(timeZone);
}
private void setConverterType(ELContext elContext,
DateTimeConverter converter,
ValueExpression value)
{
String type;
if (value == null)
{
type = null;
}
else
{
type = (String) UIComponentELTagUtils.evaluateValueExpression(elContext, value);
}
if (type == null)
{
//Now check the conditions on the spec, for type is not defined
// page 9-20
String timeStyle = (_timeStyle == null) ? null :
(String) UIComponentELTagUtils.evaluateValueExpression(elContext, _timeStyle);
String dateStyle = (_dateStyle == null) ? null :
(String) UIComponentELTagUtils.evaluateValueExpression(elContext, _dateStyle);
if (dateStyle == null)
{
if (timeStyle == null)
{
// if none type defaults to DEFAULT_TYPE
type = DEFAULT_TYPE;
}
else
{
// if timeStyle is set and dateStyle is not, type defaults to TYPE_TIME
type = TYPE_TIME;
}
}
else
{
if (timeStyle == null)
{
// if dateStyle is set and timeStyle is not, type defaults to TYPE_DATE
type = TYPE_DATE;
}
else
{
// if both dateStyle and timeStyle are set, type defaults to TYPE_BOTH
type = TYPE_BOTH;
}
}
}else {
if (!TYPE_DATE.equals(type) &&
!TYPE_TIME.equals(type) &&
!TYPE_BOTH.equals(type))
{
type = DEFAULT_TYPE;
}
}
converter.setType(type);
}
}