org.springframework.web.servlet.tags
Class RequestContextAwareTag
java.lang.Object
javax.servlet.jsp.tagext.TagSupport
org.springframework.web.servlet.tags.RequestContextAwareTag
- All Implemented Interfaces:
- Serializable, IterationTag, JspTag, Tag, TryCatchFinally
- Direct Known Subclasses:
- HtmlEscapeTag, HtmlEscapingAwareTag
public abstract class RequestContextAwareTag
- extends TagSupport
- implements TryCatchFinally
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
,
Serialized Form
Methods inherited from class javax.servlet.jsp.tagext.TagSupport |
doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
REQUEST_CONTEXT_PAGE_ATTRIBUTE
public static final String REQUEST_CONTEXT_PAGE_ATTRIBUTE
PageContext
attribute for the
page-level RequestContext
instance.
- See Also:
- Constant Field Values
logger
protected final Log logger
- Logger available to subclasses
RequestContextAwareTag
public RequestContextAwareTag()
doStartTag
public final int doStartTag()
throws JspException
- Create and expose the current RequestContext.
Delegates to
doStartTagInternal()
for actual work.
- Specified by:
doStartTag
in interface Tag
- Overrides:
doStartTag
in class TagSupport
- Throws:
JspException
- See Also:
REQUEST_CONTEXT_PAGE_ATTRIBUTE
,
JspAwareRequestContext
getRequestContext
protected final RequestContext getRequestContext()
- Return the current RequestContext.
doStartTagInternal
protected abstract int doStartTagInternal()
throws Exception
- Called by doStartTag to perform the actual work.
- Returns:
- same as TagSupport.doStartTag
- Throws:
Exception
- any exception, any checked one other than
a JspException gets wrapped in a JspException by doStartTag- See Also:
TagSupport.doStartTag()
doCatch
public void doCatch(Throwable throwable)
throws Throwable
- Specified by:
doCatch
in interface TryCatchFinally
- Throws:
Throwable
doFinally
public void doFinally()
- Specified by:
doFinally
in interface TryCatchFinally