org.apache.taglibs.standard.tlv

Class JstlCoreTLV

java.lang.Object

javax.servlet.jsp.tagext.TagLibraryValidator

org.apache.taglibs.standard.tlv.JstlBaseTLV

org.apache.taglibs.standard.tlv.JstlCoreTLV

Direct Known Subclasses:

JstlELCoreTLV

public class JstlCoreTLV
extends JstlBaseTLV

A SAX-based TagLibraryValidator for the core JSTL tag library. Currently implements the following checks:

• Expression syntax validation.
• Choose / when / otherwise constraints
• Tag bodies that must either be empty or non-empty given particular attributes. (E.g., cannot have a body when 'value' is specified; it *must* have a body otherwise.) For these purposes, "having a body" refers to non-whitespace content inside the tag.
• Other minor constraints.

Author:

Shawn Bayern

Field Summary

Fields inherited from class org.apache.taglibs.standard.tlv.JstlBaseTLV

APPLICATION_SCOPE, config, failed, JSP, lastElementId, messageVector, PAGE_SCOPE, prefix, REQUEST_SCOPE, SCOPE, SESSION_SCOPE, TYPE_CORE, TYPE_FMT, TYPE_SQL, TYPE_XML, uri, VAR

Constructor Summary

Constructors

Constructor and Description
JstlCoreTLV()

Method Summary

Modifier and Type	Method and Description
protected DefaultHandler	getHandler()
ValidationMessage[]	validate(String prefix, String uri, PageData page) Validate a JSP page.

Methods inherited from class org.apache.taglibs.standard.tlv.JstlBaseTLV

fail, getLocalPart, hasAttribute, hasDanglingScope, hasEmptyVar, hasNoInvalidScope, isCoreTag, isFmtTag, isJspTag, isSpecified, isSqlTag, isTag, isXmlTag, release, validate, validateExpression

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

JstlCoreTLV

public JstlCoreTLV()

Method Detail

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.

getHandler

protected DefaultHandler getHandler()

Specified by:

getHandler in class JstlBaseTLV