## javax.servlet.jsp.jstl.tlv
Class PermittedTaglibsTLV

    java.lang.Object
      javax.servlet.jsp.tagext.TagLibraryValidator
          javax.servlet.jsp.jstl.tlv.PermittedTaglibsTLV

    public class PermittedTaglibsTLV

extends TagLibraryValidator

A TagLibraryValidator class to allow a TLD to restrict what taglibs (in addition to itself) may be imported on a page where it's used.

This TLV supports the following initialization parameter:

- permittedTaglibs: A whitespace-separated list of URIs corresponding to tag libraries permitted to be imported on the page in addition to the tag library that references PermittedTaglibsTLV (which is allowed implicitly).

Author:
  Shawn Bayern

Constructor Summary
`PermittedTaglibsTLV()`

Method Summary
`void` `release()` Release any data kept by this instance for validation purposes.
`ValidationMessage[]` `validate(String prefix, String uri, PageData page)` Validate a JSP page.

Methods inherited from class javax.servlet.jsp.tagext.TagLibraryValidator
`getInitParameters, setInitParameters`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### PermittedTaglibsTLV

    public PermittedTaglibsTLV()

Method Detail

### release

    public void release()

  Description copied from class: `TagLibraryValidator`
  Release any data kept by this instance for validation purposes.

  Overrides:
    `release` in class `TagLibraryValidator`

### validate

    public ValidationMessage[] validate(String prefix,
                                        String uri,
                                        PageData page)

  Description copied from class: `TagLibraryValidator`
  Validate a JSP page. This will get invoked once per unique tag library URI in the XML view. This method will return null if the page is valid; otherwise the method should return an array of ValidationMessage objects. An array of length zero is also interpreted as no errors.

  Overrides:
    `validate` in class `TagLibraryValidator`
  Parameters:
    `prefix` - the first prefix with which the tag library is associated, in the XML view. Note that some tags may use a different prefix if the namespace is redefined.
    `uri` - the tag library's unique identifier
    `page` - the JspData page object
  Returns:
    A null object, or zero length array if no errors, an array of ValidationMessages otherwise.

Copyright © 2007 Mort Bay Consulting. All Rights Reserved.