Package jakarta.faces.webapp

Class ValidatorELTag

java.lang.Object
jakarta.servlet.jsp.tagext.TagSupport
jakarta.faces.webapp.ValidatorELTag
All Implemented Interfaces:
jakarta.servlet.jsp.tagext.IterationTag, jakarta.servlet.jsp.tagext.JspTag, jakarta.servlet.jsp.tagext.Tag, Serializable
Direct Known Subclasses:
AbstractValidatorTag, CreditCardValidatorTag
public abstract class ValidatorELTag
extends jakarta.servlet.jsp.tagext.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.

See Also:
Serialized Form

  • 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

  • Constructor Summary

    Constructors 
    Constructor Description
    ValidatorELTag()  

  • Method Summary

    Modifier and Type Method 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.

    Methods inherited from class jakarta.servlet.jsp.tagext.TagSupport

    doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

  • Method Details

    • doStartTag

      public int doStartTag() throws jakarta.servlet.jsp.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.

      Specified by:
      doStartTag in interface jakarta.servlet.jsp.tagext.Tag
      Overrides:
      doStartTag in class jakarta.servlet.jsp.tagext.TagSupport
      Throws:
      jakarta.servlet.jsp.JspException - if a Jakarta Server Pages error occurs

    • createValidator

      protected abstract Validator createValidator() throws jakarta.servlet.jsp.JspException

      Create and return a new Validator to be registered on our surrounding UIComponent.

      Returns:
      the created Validator
      Throws:
      jakarta.servlet.jsp.JspException - if a new instance cannot be created