org.springframework.web.servlet.tags

Class RequestContextAwareTag

java.lang.Object

TagSupport

org.springframework.web.servlet.tags.RequestContextAwareTag

Direct Known Subclasses:

HtmlEscapeTag, HtmlEscapingAwareTag

public abstract class RequestContextAwareTag
extends TagSupport

Superclass for all tags that require a RequestContext.

The RequestContext instance provides easy access to current state like the WebApplicationContext, the Locale, the Theme, etc.

Mainly intended for DispatcherServlet requests; will use fallbacks when used outside DispatcherServlet.

Author:

Rod Johnson, Juergen Hoeller

See Also:

RequestContext, DispatcherServlet

Field Summary

Fields

Modifier and Type	Field and Description
protected Log	logger Logger available to subclasses
static java.lang.String	REQUEST_CONTEXT_PAGE_ATTRIBUTE javax.servlet.jsp.PageContext attribute for the page-level RequestContext instance.
private RequestContext	requestContext

Constructor Summary

Constructors

Constructor and Description
RequestContextAwareTag()

Method Summary

Modifier and Type	Method and Description
void	doCatch(java.lang.Throwable throwable)
void	doFinally()
int	doStartTag() Create and expose the current RequestContext.
protected abstract int	doStartTagInternal() Called by doStartTag to perform the actual work.
protected RequestContext	getRequestContext() Return the current RequestContext.

Methods inherited from class java.lang.Object

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

Field Detail

REQUEST_CONTEXT_PAGE_ATTRIBUTE

public static final java.lang.String REQUEST_CONTEXT_PAGE_ATTRIBUTE

javax.servlet.jsp.PageContext attribute for the page-level RequestContext instance.

See Also:

Constant Field Values

logger

protected final Log logger

Logger available to subclasses

requestContext

private RequestContext requestContext

Constructor Detail

RequestContextAwareTag

public RequestContextAwareTag()

Method Detail

doStartTag

public final int doStartTag()
                     throws JspException

Create and expose the current RequestContext. Delegates to doStartTagInternal() for actual work.

Throws:

JspException

See Also:

REQUEST_CONTEXT_PAGE_ATTRIBUTE, JspAwareRequestContext

getRequestContext

protected final RequestContext getRequestContext()

Return the current RequestContext.

doStartTagInternal

protected abstract int doStartTagInternal()
                                   throws java.lang.Exception

Called by doStartTag to perform the actual work.

Returns:

same as TagSupport.doStartTag

Throws:

java.lang.Exception - any exception, any checked one other than a JspException gets wrapped in a JspException by doStartTag

See Also:

javax.servlet.jsp.tagext.TagSupport#doStartTag

doCatch

public void doCatch(java.lang.Throwable throwable)
             throws java.lang.Throwable

Throws:

java.lang.Throwable

doFinally

public void doFinally()