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

Field Summary
Fields
Modifier and Type Field Description
protected Log logger
Logger available to subclasses
static String REQUEST_CONTEXT_PAGE_ATTRIBUTE
PageContext attribute for the page-level RequestContext instance.
- Fields inherited from class javax.servlet.jsp.tagext.TagSupport
  id, pageContext
- Fields inherited from interface javax.servlet.jsp.tagext.IterationTag
  EVAL_BODY_AGAIN
- Fields inherited from interface javax.servlet.jsp.tagext.Tag
  EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary
Constructors
Constructor Description
RequestContextAwareTag()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`doCatch(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 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

- Field Detail
  - 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
- 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.
    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

Modifier and Type	Field	Description
`protected Log`	`logger`	Logger available to subclasses
`static String`	`REQUEST_CONTEXT_PAGE_ATTRIBUTE`	`PageContext` attribute for the page-level `RequestContext` instance.

Class RequestContextAwareTag

Field Summary

Fields inherited from class javax.servlet.jsp.tagext.TagSupport

Fields inherited from interface javax.servlet.jsp.tagext.IterationTag

Fields inherited from interface javax.servlet.jsp.tagext.Tag

Constructor Summary

Method Summary

Methods inherited from class javax.servlet.jsp.tagext.TagSupport

Methods inherited from class java.lang.Object

Field Detail

REQUEST_CONTEXT_PAGE_ATTRIBUTE

logger

Constructor Detail

RequestContextAwareTag

Method Detail

doStartTag

getRequestContext

doStartTagInternal

doCatch

doFinally