Class ValidatorELTag
- All Implemented Interfaces:
Serializable
,IterationTag
,JspTag
,Tag
ValidatorELTag is a base class for all JSP 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 javax.servlet.jsp.tagext.TagSupport
id, pageContext
Fields inherited from interface javax.servlet.jsp.tagext.IterationTag
EVAL_BODY_AGAIN
Fields inherited from interface javax.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 JSP page.Methods inherited from class javax.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 JSP page.- Specified by:
doStartTag
in interfaceTag
- Overrides:
doStartTag
in classTagSupport
- Returns:
- SKIP_BODY
- Throws:
JspException
- if a JSP 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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