ValidatorELTag (Java EE 5 SDK) - Java Platform, Enterprise Edition v5.0 API Specifications

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javax.faces.webapp
Class ValidatorELTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      javax.faces.webapp.ValidatorELTag

All Implemented Interfaces:: Serializable, IterationTag, JspTag, Tag

public abstract class ValidatorELTag
extends TagSupport
extends TagSupport

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:: Serialized Form

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

Constructor Summary

ValidatorELTag()


Method Summary

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 JSP page.

Methods inherited from class javax.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

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`

Constructor Summary
`ValidatorELTag()`

Method Summary
`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 JSP page.

Methods inherited from class javax.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 Detail

ValidatorELTag

public ValidatorELTag()

Method Detail

doStartTag

public 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 JSP page.

Specified by:: doStartTag in interface Tag
Overrides:: doStartTag in class TagSupport

Returns:: SKIP_BODY
Throws:: JspException - if a JSP error occurs
See Also:: Tag.doStartTag()

createValidator

protected abstract Validator createValidator()
                                      throws JspException

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

Throws:: JspException - if a new instance cannot be created