Class ValidatorELTag
- All Implemented Interfaces:
IterationTag
,JspTag
,Tag
,Serializable
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.
- See Also:
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Field Summary
Fields inherited from class jakarta.servlet.jsp.tagext.TagSupport
id, pageContext
Fields inherited from interface jakarta.servlet.jsp.tagext.IterationTag
EVAL_BODY_AGAIN
Fields inherited from interface jakarta.servlet.jsp.tagext.Tag
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected abstract Validator
Create and return a newValidator
to be registered on our surroundingUIComponent
.int
Create a new instance of the specifiedValidator
class, and register it with theUIComponent
instance associated with our most immediately surroundingUIComponentTagBase
instance, if theUIComponent
instance was created by this execution of the containing Jakarta Server Pages page.Methods inherited from class jakarta.servlet.jsp.tagext.TagSupport
doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue
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Constructor Details
-
ValidatorELTag
public ValidatorELTag()
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Method Details
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doStartTag
Create a new instance of the specified
Validator
class, and register it with theUIComponent
instance associated with our most immediately surroundingUIComponentTagBase
instance, if theUIComponent
instance was created by this execution of the containing Jakarta Server Pages page.- Specified by:
doStartTag
in interfaceTag
- Overrides:
doStartTag
in classTagSupport
- Returns:
- SKIP_BODY
- Throws:
JspException
- if a Jakarta Server Pages error occurs- See Also:
-
createValidator
Create and return a new
Validator
to be registered on our surroundingUIComponent
.- Returns:
- the created
Validator
- Throws:
JspException
- if a new instance cannot be created
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