Using Core Tags

The tags included in the JavaServer Faces core tag library are used to perform core actions that are not performed by HTML tags. Commonly used core tags are listed in Table 7-5 along with the functions they perform.

Table 7-5 The `Core` Tags

Tag Categories	Tags	Functions
Event-handling tags	`f:actionListener`	Adds an action listener to a parent component
	`f:phaseListener`	Adds a PhaseListener to a page
	`f:setPropertyActionListener`	Registers a special action listener whose sole purpose is to push a value into a backing bean when a form is submitted
	`f:valueChangeListener`	Adds a value-change listener to a parent component
Attribute configuration tag	`f:attribute`	Adds configurable attributes to a parent component
Data conversion tags	`f:converter`	Adds an arbitrary converter to the parent component
	`f:convertDateTime`	Adds a `DateTime` converter instance to the parent component
	`f:convertNumber`	Adds a `Number` converter instance to the parent component
Facet tag	`f:facet`	Adds a nested component that has a special relationship to its enclosing tag
Facet tag	`f:metadata`	Registers a `facet` on a parent component
Localization tag	`f:loadBundle`	Specifies a `ResourceBundle` that is exposed as a `Map`
Parameter substitution tag	`f:param`	Substitutes parameters into a `MessageFormat` instance and adds query string name-value pairs to a URL
Tags for representing items in a list	`f:selectItem`	Represents one item in a list of items in a `SelectOne` or `SelectMany` component
Tags for representing items in a list	`f:selectItems`	Represents a set of items in a `SelectOne` or `SelectMany` component
Validator tags	`f:validateDoubleRange`	Adds a `DoubleRangeValidator` to a component
	`f:validateLength`	Adds a `LengthValidator` to a component
	`f:validateLongRange`	Adds a `LongRangeValidator` to a component
	`f:validator`	Adds a custom validator to a component
	`f:validateRegEx`	Adds a RegExValidator instance to a component
	`f:validateBean`	Delegates the validation of a local value to a BeanValidator instance
	`f:validateRequired`	Enforces the presence of a value in a component
Ajax tag	`f:ajax`	Associates Ajax action to a single or group of components based on placement
Event tag	`f:event`	Allows installing `ComponentSystemEventListener` on a component

These tags, which are used in conjunction with component tags, are explained in other sections of this tutorial. Table 7-6 lists the sections that explain how to use specific core tags.

Table 7-6 Where the Core Tags Are Explained

Tags	Where Explained
`Event-handling tags`	Registering Listeners on Components
`Data conversion tags`	Using the Standard Converters
`facet`	Using Data-Bound Table Components and Laying Out Components With the `Panel` Component
`loadBundle`	Rendering Components for Selecting Multiple Values
`param`	Displaying a Formatted Message With the `h:outputFormat` Tag
`selectItem` and `selectItems`	Using The `SelectItem` and `SelectItems` Components
`Validator tags`	Using the Standard Validators

Using Core Tags

Table 7-5 The Core Tags

Table 7-6 Where the Core Tags Are Explained

Table 7-5 The `Core` Tags