javax.faces.webapp
Class ValidatorELTag

java.lang.Object
  extended by javax.servlet.jsp.tagext.TagSupport
      extended by javax.faces.webapp.ValidatorELTag
All Implemented Interfaces:
Serializable, javax.servlet.jsp.tagext.IterationTag, javax.servlet.jsp.tagext.JspTag, javax.servlet.jsp.tagext.Tag

public abstract class ValidatorELTag
extends javax.servlet.jsp.tagext.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
 

Constructor Detail

ValidatorELTag

public ValidatorELTag()
Method Detail

doStartTag

public int doStartTag()
               throws javax.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 JSP page.

Specified by:
doStartTag in interface javax.servlet.jsp.tagext.Tag
Overrides:
doStartTag in class javax.servlet.jsp.tagext.TagSupport
Throws:
javax.servlet.jsp.JspException - if a JSP error occurs

createValidator

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

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

Throws:
javax.servlet.jsp.JspException - if a new instance cannot be created


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