OmniFaces & JSF Fans: [OmniFaces utilities (2.0)] Get whether the given editable value holder component has a submitted value

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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vineri, 20 februarie 2015

[OmniFaces utilities (2.0)] Get whether the given editable value holder component has a submitted value

[OmniFaces utilities] The hasSubmittedValue() method returns whether the given editable value holder component has a submitted value.

Method:

As you can see an empty value is considered a null value or an empty string.

Usage:

JSF Page

<h:form id="myForm">

<h:inputText id="nameId" value="..."/>

...

</h:form>

Programmatically:

import org.omnifaces.util.Components;

...

UIInput uiinput = (UIInput)Faces.getViewRoot().findComponent("myForm:nameId");

boolean hasSubmittedValue = Components.hasSubmittedValue(uiinput);

If you follow a simple postback scenario then the above method will return the results from figure below for non-empty submitted value:

API GH

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<h:inputText/>
<f:param/>
<h:inputSecret/>
<h:link/>
<h:message/>
<f:attribute/>
<h:commandButton/>
<h:inputTextarea/>
<h:messages/>
<h:selectBooleanCheckbox/>
<h:selectManyListbox/>
<h:selectManyCheckbox/>
<h:selectOneRadio/>
<h:selectOneListbox/>
<h:selectOneMenu/>
<h:inputHidden/>
<h:panelGrid/>
<h:outputFormat/>
<h:outputLink/>
<h:outputStylesheet/>
<f:setPropertyActionListener/>
<h:outputScript/>
<h:commandLink/>
<h:graphicImage/>
<h:outputText/>
<f:convertNumber/>
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[OmniFaces utilities]

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

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

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

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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

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