The ValidateLength tag registers a LengthValidator instance on the component associated with the enclosing tag. This tag can be used to validate user input when the expected value is a string of a specific length.

Example:

<h:inputSecret id="password" value="#{userBean.user.password}">
  <f:validateLength minimum="8" maximum="16" />
</h:inputSecret>
<h:message for="password" />

HTML Output

<input id="form:password" name="form:password" type="password"/>
"password": Value is shorter than the allowable minimum of 8 characters.