public abstract class ValidatorELTag extends TagSupport
ValidatorELTag is a base class for all Jakarta Server Pages custom actions that create and register
a Validator instance on the EditableValueHolder associated with our most immediate surrounding
instance of a tag whose implementation class is a subclass of UIComponentTag. To avoid creating duplicate
instances when a page is redisplayed, creation and registration of a Validator occurs only
if the corresponding UIComponent was created (by the owning UIComponentTagBase) during the execution
of the current page.
This class must be used as a base class for tag instances that support specific Validator subclasses.
Subclasses of this class must implement the createValidator() method, which creates and returns a
Validator instance. Any configuration properties that specify the limits to be enforced by this
Validator must have been set by the createValidator() method. Generally, this occurs by copying
corresponding attribute values on the tag instance.
This tag creates no output to the page currently being created. It is used solely for the side effect of
Validator creation.
id, pageContextEVAL_BODY_AGAINEVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE| Constructor and Description |
|---|
ValidatorELTag() |
| Modifier and Type | Method and Description |
|---|---|
protected abstract Validator |
createValidator()
Create and return a new
Validator to be registered on our surrounding UIComponent. |
int |
doStartTag()
Create a new instance of the specified
Validator class, and register it with the UIComponent instance
associated with our most immediately surrounding UIComponentTagBase instance, if the UIComponent
instance was created by this execution of the containing Jakarta Server Pages page. |
doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValuepublic int doStartTag()
throws JspException
Create a new instance of the specified Validator class, and register it with the UIComponent instance
associated with our most immediately surrounding UIComponentTagBase instance, if the UIComponent
instance was created by this execution of the containing Jakarta Server Pages page.
doStartTag in interface TagdoStartTag in class TagSupportJspException - if a Jakarta Server Pages error occursTag.doStartTag()protected abstract Validator createValidator() throws JspException
Create and return a new Validator to be registered on our surrounding UIComponent.
ValidatorJspException - if a new instance cannot be created