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sâmbătă, 28 noiembrie 2015

[OmniFaces utilities 2.0] A mapping of days names (full/short names) by day numbers for the current locale


[OmniFaces utilities] The getDaysOfWeek() function returns a mapping of day of week names in ISO 8601 order (Monday first) for the current locale. For example: "Monday=1", "Tuesday=2", etc. This is useful if you want to for example populate a <f:selectItems> which shows all days of week. The locale is obtained by Faces#getLocale(). The mapping is per locale stored in a local cache to improve retrieving performance.

[OmniFaces utilities] The getShortDaysOfWeek() function returns a mapping of short day of week names in ISO 8601 order (Monday first) for the current locale. For example: "Mon=1", "Tue=2", etc. This is useful if you want to for example populate a <f:selectItems> which shows all short days of week. The locale is obtained by Faces#getLocale(). The mapping is per locale stored in a local cache to improve retrieving performance.

[OmniFaces utilities] The getDayOfWeek() function returns the day of week name from the mapping associated with the given day of week number in ISO 8601 order (Monday first) for the current locale. For example: "1=Monday", "2=Tuesday", etc. The locale is obtained by Faces#getLocale().

[OmniFaces utilities] The getShortDayOfWeek() function returns the short day of week name from the mapping associated with the given day of week number in ISO 8601 order (Monday first) for the current locale. For example: "1=Mon", "2=Tue", etc. The locale is obtained by Faces#getLocale().

Function(full names):
Function(short names):

Functions (get day name (full/short name) by day number)

In OmniFaces Showcase you can see how an example of how to populate a <f:selectItems/> which shows all days of week. Below, you can see an example of displaying the days of week numbers and names in a data table.

Full names via of:getDaysOfWeek():

<h:dataTable value="#{of:getDaysOfWeek().entrySet()}" var="t">
 <h:column>
  <f:facet name="header">No.</f:facet>
  #{t.value}
 </h:column>
 <h:column>
  <f:facet name="header">Name</f:facet>
  #{t.key}
 </h:column>
</h:dataTable>

Short names via of:getShortDaysOfWeek():

<h:dataTable value="#{of:getShortDaysOfWeek().entrySet()}" var="t">
 <h:column>
  <f:facet name="header">No.</f:facet>
  #{t.value}
 </h:column>
 <h:column>
  <f:facet name="header">Name</f:facet>
  #{t.key}
 </h:column>
</h:dataTable>

Moreover, we can obtain a day name (short name) by its number via of:getDayOfWeek() and of:getShortDayOfWeek():

The day 4 of the week is: #{of:getDayOfWeek(4)}
Output: Thursday 
The day 4 of the week is: #{of:getShortDayOfWeek(4)}
Output: Thu

The day number can be provided from a managed bean also:

#{of:getDayOfWeek(fooBean.daynumer)}
#{of:getShortDayOfWeek(fooBean.daynumer)}

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