OmniFaces & JSF Fans: [OmniFaces utilities (2.0)] Check whether the HTTP session has already been created

OmniFaces is an utility library for JSF, including PrimeFaces, RichFaces, ICEfaces ...
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Ajax
- (2.3) Load given script resource on complete of the current AJAX response
- (2.0) Get the current partial view context (the ajax context)
- (2.0) Programmatically update the given client IDs in the current ajax response
- (2.0) Programmatically update the entire view
- (2.2) Update the row of the given UIData component at the given zero-based row index (table pagination supported)
- (2.2) Update the row of the given UIData component at the given zero-based row index (support for nested UIData)
- (2.0) Update the row of the given UIData component at the given zero-based row index (table pagination and nested UIData NOT supported)
- (2.0) Update the column of the given UIData component at the given zero-based column index
- (2.0/2.3) Execute the given scripts on complete of the current ajax response
- (2.0) Add the given data argument to the current ajax response
- (2.0) Add the given data arguments to the current ajax response
- (2.0) Add the given mapping of data arguments to the current ajax response
Beans
- (2.3) Check if the given CDI managed bean scope is active
- (2.3) Fire the given CDI event, optionally with the given qualifiers
- (2.0) Get the CDI bean manager
- (2.0) Get the CDI managed bean representation of the given bean class
- (2.0) Get the CDI managed bean reference (proxy) of the given bean class
- (2.0) Get the CDI managed bean reference (proxy) of the given bean representation
- (2.0) Get the CDI managed bean instance (actual) of the given bean class and creates one if one doesn't exist
- (2.0) Get the CDI managed bean instance (actual) of the given bean class (decide to create one if it doesn't exist)
- (2.0) Get the CDI managed bean instance (actual) of the given bean representation (decide to create one if it doesn't exist)
- (2.0) Destroy the currently active instance of the given CDI managed bean class/representation
- (2.0) Get program element annotation of a certain annotation type
- (2.0) Get the current injection point within a dynamic producer Bean
- (2.1) Get all active CDI managed bean instances in the given CDI managed bean scope
- (2.1) Get the qualifier annotation of the given qualifier class from the given injection point
Callbacks
- (2.1) List of OmniFaces 2.1 serializable Callback interfaces
- (2.0) List of OmniFaces 2.0 un-serializable Callback interfaces
- (2.1/2.0) Subscribe With OmniFaces 2.1 (serializable) /2.0 (un-serializable) Callback-listeners to JSF System Events
Components
Events
- (2.1/2.0) Subscribe to application system events using serializable/un-serializable Callbacks
- (2.1/2.0) Subscribe to view system events using serializable/un-serializable Callbacks
- (2.0) Subscribe the given Callback instance to the current request (invoked before/after given phase ID)
- (2.0) Subscribe the given Callback instance to the current view (invoked before/after given phase ID)
- (2.1) For a component, subscribe with a request scoped event listener / unsubscribe the given event listener on the given event
Exceptions
- (2.1/2.0) Check if the given exception or one of its nested causes is an instance of the given type
- (2.3/2.1/2.0) Unwrap the nested causes of given exception
- (2.0) Unwrap the nested causes of given exception (FacesException | ELException)
Faces
Facelets
- (2.3) Return the typed Object value of the given tag attribute
- (2.0) Return the String value of the given attribute
- (2.0) Return the boolean value of the given attribute
- (2.0) Return the Object value of the given attribute
- (2.1) Return the value of the given tag attribute as a value expression
JSON
- (2.0) Encode the given Boolean/Number/CharSequence/Date as JSON
- (2.0) Encode the given Collection as JSON
- (2.0) Encode the given array as JSON
- (2.0) Encode the given Map as JSON
- (2.0) Encode the given bean instance as JSON
Hacks
State
- (2.0) Get value from state by key
- (2.0) Put a value in state
JNDI
- (2.2/2.1/2.0) Get the named environment entry for the deployment component from where this is called
- (2.2/2.1/2.0) Get the named object from the default JNDI instance
Platform
- (2.0) Bootstrap the Validation using the default validation provider resolver
- (2.0) Get a Validator instance
- (2.0) Check if Bean Validation is available
- (2.0) Get the ServletRegistration associated with the FacesServlet
Utils
Messages
MapWrapper
- (2.0) Working with OmniFaces, MapWrapper
Reflection
- (2.0) Sets the values associated with the properties of an object
- (2.0) Sets the values associated with the properties of an object (optionally coerced)
- (2.3/2.0) Find a method
- (2.1/2.0) Get the Class instance associated with the class of the given string
- (2.1/2.0) Creates an instance of a class with the given string name or the given Class object
Renderers
- (2.0) Write component attributes of the given
  property-HTML mapping of names
- (2.0) Write component attributes of the given names
- (2.0) Write given attribute value as given HTML attribute name
  associated with given component property name
- (2.0) Write given attribute value as given HTML attribute name
- (2.0) Write component attribute of the given name as given
  HTML attribute name associated with given component
  property name
- (2.0) Write component attribute of the given name as given
  HTML attribute name
- (2.0) Write component attribute of the given name
- (2.0) Write the given text either HTML-escaped or unescaped
ResourcePaths
- (2.0) Checks if the given resource path (#getResourcePaths()) is a directory
- (2.0) Strip the given prefix path from the given resource path if any
- (2.0) Strip the extension from a resource if any
- (2.0) Get the extension of a resource if any
- (2.0) Check extension-less URLs
- (2.0) Filter away every resource in the given set that has an extension
XML
- (2.1) Create a single XML Document based on given XML URLs
- (2.1) Create a lenient instance of DocumentBuilder
- (2.1) Return a node list matching given XPath expression
- (2.1) Return the trimmed text content of given node
Servlets
Arrays
- (2.4) Create a copy of the array with items in reversed order
- (2.0) Create a dummy object array of the given size
- (2.0) Create an integer array which starts/ends at the given integers, inclusive
- (2.0) Check if the string representation of an item of the given array equals to the string representation of the given item
Converters
- (2.0) Convert a Set<E> to a List<E>
- (2.0) Convert a Map<K, V> to a List<Map.Entry<K, V>>
- (2.0) Convert a Iterable<E> to a List<E>
- (2.0) Convert an Iterable<E> to a DataModel<E>
- (2.0) Join all elements of the given array to a single string, separated by the given separator
- (2.0) Join all elements of the given collection to a single string, separated by the given separator
- (2.0) Join all elements of the given map to a single string, separated by the given key-value pair separator and entry separator
- (2.0) Split the given array into an array of subarrays of the given fragment size
- (2.0) Split the given list into a list of sublists of the given fragment size
- (2.0) Encode given object as JSON
- (2.0) Print the stack trace of the given exception
Dates
- (2.0) Format the given date in the given pattern with system default/provided timezone
- (2.0) Return a new date instance which is a sum of the given date and the given amount of years ... seconds
- (2.0) Return the amount of years/months/weeks/days between two given dates
- (2.0) Return the amount of hours/minutes/seconds between two given dates
- (2.0) Return a mapping of month names (full/short names) by month numbers for the current locale
- (2.0) Return a mapping of days names (full/short names) by day numbers for the current locale
Numbers
- (2.4) Format the given number to nearest 10ⁿ (rounded to thousands, k, M, G, T, P or E)
- (2.4) Format the given number to nearest 10ⁿ, suffixed with a space, the metric unit prefix and the given unit
- (2.3) Format the given number in the default pattern of the given locale
- (2.3) Format the given number to nearest 10ⁿ (rounded to thousands, k, M, G, T, P or E)
- (2.3) Format the given number to nearest 10ⁿ, suffixed with a space, the metric unit prefix and the given unit
- (2.0) Format the given bytes to nearest 10ⁿ with IEC binary unit (KiB, MiB, etc) with rounding precision of 1 fraction
- (2.0) Format the given number as currency with the given symbol
- (2.0) Format the given number in the given pattern
- (2.0) Format the given number in the locale-default pattern
- (2.0) Format the given number as percentage
Objects
- (2.0) Get the first non-null object from the provided two objects
Strings
- (2.0) Abbreviate the given text on the given size limit with ellipsis
- (2.0) Concatenate the string representation of the given objects
- (2.0) Capitalize the given string, i.e. uppercase the first character
- (2.0) Replace all matches of the given pattern on the given string with the given replacement
- (2.0) Validate if the given string matches the given pattern
- (2.0) URL-prettify the given string
- (2.0) URL-encode the given string using UTF-8
- (2.0) Escape the given string according the JavaScript code rules
- (2.0) Format the given string with 1, 2, 3, 4, 5 parameter(s)

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luni, 13 aprilie 2015

[OmniFaces utilities (2.0)] Check whether the HTTP session has already been created

[OmniFaces utilities] The hasSession() method returns whether the HTTP session has already been created.

Method:

See also: Faces#getContext() | Faces#getSession()

Usage:

import org.omnifaces.util.Faces;

...

boolean hassession = Faces.hasSession();

if(hassession){

// do something

} else {

// do something else

}

API GH

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<f:attribute/>
<h:commandButton/>
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<h:selectBooleanCheckbox/>
<h:selectManyListbox/>
<h:selectManyCheckbox/>
<h:selectOneRadio/>
<h:selectOneListbox/>
<h:selectOneMenu/>
<h:inputHidden/>
<h:panelGrid/>
<h:outputFormat/>
<h:outputLink/>
<h:outputStylesheet/>
<f:setPropertyActionListener/>
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<h:commandLink/>
<h:graphicImage/>
<h:outputText/>
<f:convertNumber/>
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[OmniFaces utilities]

...: OmniFaces collections of utility methods :...

Renderers

Collection of utility methods for the JSF API with respect to working with Renderer

Platform

This class provides access to (Java EE 6) platform services from the view point of JSF

Map Wrapper

Implementation of Map that wraps another map. This allows interception of one or more method on this wrapped map

JNDI

Utility class for simplifying some web related tasks that use JNDI under the hood, such as getting the <env-entry> from web.xml

State

Helper class for StateHelper that uses generic type-inference to make code that uses the StateHelper slightly less verbose

Beans

Collection of utility methods for the CDI API that are mainly shortcuts for obtaining stuff from the BeanManager

Components

Collection of utility methods for the JSF API with respect to working with UIComponent. There are several traversal/lookup methods, there are several UIForm and UIInput related methods which makes it easier to deal with forms and inputs

.Events

Collection of utility methods for the JSF API with respect to working with system and phase events

Servlets

Collection of utility methods for the Servlet API in general

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Reflection

Collection of utility methods for working with reflection

Messages

Collection of utility methods for the JSF API with respect to working with FacesMessage

JSON

Encodes the given object as JSON. This supports the standard types Boolean, Number, CharSequence and Date.

Utils

Collection of general utility methods that do not fit in one of the more specific classes

Hacks

Collection of JSF implementation and/or JSF component library specific hacks

Facelets

Collection of utility methods for Facelets code

Exceptions

Collection of general utility methods with respect to working with exceptions

Callbacks

Collection of callback interfaces. Useful in (mini) visitor and strategy patterns

Ajax

Collection of utility methods for working with PartialViewContext. There are also shortcuts to the current OmniPartialViewContext instance.

Faces

Collection of utility methods for the JSF API that are mainly shortcuts for obtaining stuff from the thread local

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