Module jakarta.servlet.jsp.jstl

Package jakarta.servlet.jsp.jstl.tlv

Class ScriptFreeTLV

java.lang.Object

jakarta.servlet.jsp.tagext.TagLibraryValidator

jakarta.servlet.jsp.jstl.tlv.ScriptFreeTLV

public class ScriptFreeTLV
extends TagLibraryValidator

A TagLibraryValidator for enforcing restrictions against the use of JSP scripting elements.

This TLV supports four initialization parameters, for controlling which of the four types of scripting elements are allowed or prohibited:

• allowDeclarations: if true, indicates that declaration elements are not prohibited.
• allowScriptlets: if true, indicates that scriptlets are not prohibited
• allowExpressions: if true, indicates that top-level expression elements (i.e., expressions not associated with request-time attribute values) are not prohibited.
• allowRTExpressions: if true, indicates that expression elements associated with request-time attribute values are not prohibited.

The default value for all for initialization parameters is false, indicating all forms of scripting elements are to be prohibited.

Constructor Summary

Constructors

Constructor	Description
ScriptFreeTLV()	Constructs a new validator instance.

Method Summary

Modifier and Type	Method	Description
void	setInitParameters(Map<String,Object> initParms)	Sets the values of the initialization parameters, as supplied in the TLD.
ValidationMessage[]	validate(String prefix, String uri, PageData page)	Validates a single JSP page.

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

getInitParameters, release

Methods inherited from class java.lang.Object

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

Constructor Details

ScriptFreeTLV

public ScriptFreeTLV()

Constructs a new validator instance. Initializes the parser factory to create non-validating, namespace-aware SAX parsers.

Method Details

setInitParameters

public void setInitParameters(Map<String,Object> initParms)

Sets the values of the initialization parameters, as supplied in the TLD.

Overrides:

setInitParameters in class TagLibraryValidator

Parameters:

initParms - a mapping from the names of the initialization parameters to their values, as specified in the TLD.

validate

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

Validates a single JSP page.

Overrides:

validate in class TagLibraryValidator

Parameters:

prefix - the namespace prefix specified by the page for the custom tag library being validated.

uri - the URI specified by the page for the TLD of the custom tag library being validated.

page - a wrapper around the XML representation of the page being validated.

Returns:

null, if the page is valid; otherwise, a ValidationMessage[] containing one or more messages indicating why the page is not valid.