org.apache.jasper.runtime
Class PageContextImpl

java.lang.Object
  javax.servlet.jsp.JspContext
      javax.servlet.jsp.PageContext
          org.apache.jasper.runtime.PageContextImpl

All Implemented Interfaces:

javax.servlet.jsp.el.VariableResolver

public class PageContextImpl

extends javax.servlet.jsp.PageContext

implements javax.servlet.jsp.el.VariableResolver

Implementation of the PageContext class from the JSP spec. Also doubles as a VariableResolver for the EL.

Author:

Anil K. Vijendran, Larry Cable, Hans Bergsten, Pierre Delisle, Mark Roth, Jan Luehe

Field Summary

Fields inherited from class javax.servlet.jsp.PageContext

APPLICATION, APPLICATION_SCOPE, CONFIG, EXCEPTION, OUT, PAGE, PAGE_SCOPE, PAGECONTEXT, REQUEST, REQUEST_SCOPE, RESPONSE, SESSION, SESSION_SCOPE

Method Summary

java.lang.Object	findAttribute(java.lang.String name)
void	forward(java.lang.String relativeUrlPath)
java.lang.Object	getAttribute(java.lang.String name)
java.lang.Object	getAttribute(java.lang.String name, int scope)
java.util.Enumeration	getAttributeNamesInScope(int scope)
int	getAttributesScope(java.lang.String name)
java.lang.Exception	getException() Returns the exception associated with this page context, if any.
javax.servlet.jsp.el.ExpressionEvaluator	getExpressionEvaluator() Provides programmatic access to the ExpressionEvaluator.
javax.servlet.jsp.JspWriter	getOut()
java.lang.Object	getPage()
javax.servlet.ServletRequest	getRequest()
javax.servlet.ServletResponse	getResponse()
javax.servlet.Servlet	getServlet()
javax.servlet.ServletConfig	getServletConfig()
javax.servlet.ServletContext	getServletContext()
javax.servlet.http.HttpSession	getSession()
javax.servlet.jsp.el.VariableResolver	getVariableResolver()
void	handlePageException(java.lang.Exception ex)
void	handlePageException(java.lang.Throwable t)
void	include(java.lang.String relativeUrlPath)
void	include(java.lang.String relativeUrlPath, boolean flush)
void	initialize(javax.servlet.Servlet servlet, javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, java.lang.String errorPageURL, boolean needsSession, int bufferSize, boolean autoFlush)
javax.servlet.jsp.JspWriter	popBody()
static java.lang.Object	proprietaryEvaluate(java.lang.String expression, java.lang.Class expectedType, javax.servlet.jsp.PageContext pageContext, ProtectedFunctionMapper functionMap, boolean escape) Proprietary method to evaluate EL expressions.
javax.servlet.jsp.tagext.BodyContent	pushBody()
javax.servlet.jsp.JspWriter	pushBody(java.io.Writer writer)
void	release()
void	removeAttribute(java.lang.String name)
void	removeAttribute(java.lang.String name, int scope)
java.lang.Object	resolveVariable(java.lang.String pName) VariableResolver interface
void	setAttribute(java.lang.String name, java.lang.Object attribute)
void	setAttribute(java.lang.String name, java.lang.Object o, int scope)

Methods inherited from class javax.servlet.jsp.PageContext

getErrorData

Methods inherited from class java.lang.Object

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

Method Detail

initialize

public void initialize(javax.servlet.Servlet servlet,
                       javax.servlet.ServletRequest request,
                       javax.servlet.ServletResponse response,
                       java.lang.String errorPageURL,
                       boolean needsSession,
                       int bufferSize,
                       boolean autoFlush)
                throws java.io.IOException

Throws:

java.io.IOException

release

public void release()

getAttribute

public java.lang.Object getAttribute(java.lang.String name)

getAttribute

public java.lang.Object getAttribute(java.lang.String name,
                                     int scope)

setAttribute

public void setAttribute(java.lang.String name,
                         java.lang.Object attribute)

setAttribute

public void setAttribute(java.lang.String name,
                         java.lang.Object o,
                         int scope)

removeAttribute

public void removeAttribute(java.lang.String name,
                            int scope)

getAttributesScope

public int getAttributesScope(java.lang.String name)

findAttribute

public java.lang.Object findAttribute(java.lang.String name)

getAttributeNamesInScope

public java.util.Enumeration getAttributeNamesInScope(int scope)

removeAttribute

public void removeAttribute(java.lang.String name)

getOut

public javax.servlet.jsp.JspWriter getOut()

getSession

public javax.servlet.http.HttpSession getSession()

getServlet

public javax.servlet.Servlet getServlet()

getServletConfig

public javax.servlet.ServletConfig getServletConfig()

getServletContext

public javax.servlet.ServletContext getServletContext()

getRequest

public javax.servlet.ServletRequest getRequest()

getResponse

public javax.servlet.ServletResponse getResponse()

getException

public java.lang.Exception getException()

Returns the exception associated with this page context, if any.

Added wrapping for Throwables to avoid ClassCastException: see Bugzilla 31171 for details.

Returns:

The Exception associated with this page context, if any.

getPage

public java.lang.Object getPage()

include

public void include(java.lang.String relativeUrlPath)
             throws javax.servlet.ServletException,
                    java.io.IOException

Throws:

javax.servlet.ServletException

java.io.IOException

include

public void include(java.lang.String relativeUrlPath,
                    boolean flush)
             throws javax.servlet.ServletException,
                    java.io.IOException

Throws:

javax.servlet.ServletException

java.io.IOException

getVariableResolver

public javax.servlet.jsp.el.VariableResolver getVariableResolver()

forward

public void forward(java.lang.String relativeUrlPath)
             throws javax.servlet.ServletException,
                    java.io.IOException

Throws:

javax.servlet.ServletException

java.io.IOException

pushBody

public javax.servlet.jsp.tagext.BodyContent pushBody()

pushBody

public javax.servlet.jsp.JspWriter pushBody(java.io.Writer writer)

popBody

public javax.servlet.jsp.JspWriter popBody()

getExpressionEvaluator

public javax.servlet.jsp.el.ExpressionEvaluator getExpressionEvaluator()

Provides programmatic access to the ExpressionEvaluator. The JSP Container must return a valid instance of an ExpressionEvaluator that can parse EL expressions.

handlePageException

public void handlePageException(java.lang.Exception ex)
                         throws java.io.IOException,
                                javax.servlet.ServletException

Throws:

java.io.IOException

javax.servlet.ServletException

handlePageException

public void handlePageException(java.lang.Throwable t)
                         throws java.io.IOException,
                                javax.servlet.ServletException

Throws:

java.io.IOException

javax.servlet.ServletException

resolveVariable

public java.lang.Object resolveVariable(java.lang.String pName)
                                 throws javax.servlet.jsp.el.ELException

VariableResolver interface

Specified by:

resolveVariable in interface javax.servlet.jsp.el.VariableResolver

Throws:

javax.servlet.jsp.el.ELException

proprietaryEvaluate

public static java.lang.Object proprietaryEvaluate(java.lang.String expression,
                                                   java.lang.Class expectedType,
                                                   javax.servlet.jsp.PageContext pageContext,
                                                   ProtectedFunctionMapper functionMap,
                                                   boolean escape)
                                            throws javax.servlet.jsp.el.ELException

Proprietary method to evaluate EL expressions. XXX - This method should go away once the EL interpreter moves out of JSTL and into its own project. For now, this is necessary because the standard machinery is too slow.

Parameters:

expression - The expression to be evaluated

expectedType - The expected resulting type

pageContext - The page context

functionMap - Maps prefix and name to Method

Returns:

The result of the evaluation

Throws:

javax.servlet.jsp.el.ELException