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

Methods

Modifier and Type	Method and Description
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

Specified by:

initialize in class javax.servlet.jsp.PageContext

Throws:

java.io.IOException

release

public void release()

Specified by:

release in class javax.servlet.jsp.PageContext

getAttribute

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

Specified by:

getAttribute in class javax.servlet.jsp.JspContext

getAttribute

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

Specified by:

getAttribute in class javax.servlet.jsp.JspContext

setAttribute

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

Specified by:

setAttribute in class javax.servlet.jsp.JspContext

setAttribute

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

Specified by:

setAttribute in class javax.servlet.jsp.JspContext

removeAttribute

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

Specified by:

removeAttribute in class javax.servlet.jsp.JspContext

getAttributesScope

public int getAttributesScope(java.lang.String name)

Specified by:

getAttributesScope in class javax.servlet.jsp.JspContext

findAttribute

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

Specified by:

findAttribute in class javax.servlet.jsp.JspContext

getAttributeNamesInScope

public java.util.Enumeration getAttributeNamesInScope(int scope)

Specified by:

getAttributeNamesInScope in class javax.servlet.jsp.JspContext

removeAttribute

public void removeAttribute(java.lang.String name)

Specified by:

removeAttribute in class javax.servlet.jsp.JspContext

getOut

public javax.servlet.jsp.JspWriter getOut()

Specified by:

getOut in class javax.servlet.jsp.JspContext

getSession

public javax.servlet.http.HttpSession getSession()

Specified by:

getSession in class javax.servlet.jsp.PageContext

getServlet

public javax.servlet.Servlet getServlet()

getServletConfig

public javax.servlet.ServletConfig getServletConfig()

Specified by:

getServletConfig in class javax.servlet.jsp.PageContext

getServletContext

public javax.servlet.ServletContext getServletContext()

Specified by:

getServletContext in class javax.servlet.jsp.PageContext

getRequest

public javax.servlet.ServletRequest getRequest()

Specified by:

getRequest in class javax.servlet.jsp.PageContext

getResponse

public javax.servlet.ServletResponse getResponse()

Specified by:

getResponse in class javax.servlet.jsp.PageContext

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.

Specified by:

getException in class javax.servlet.jsp.PageContext

Returns:

The Exception associated with this page context, if any.

getPage

public java.lang.Object getPage()

Specified by:

getPage in class javax.servlet.jsp.PageContext

include

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

Specified by:

include in class javax.servlet.jsp.PageContext

Throws:

javax.servlet.ServletException

java.io.IOException

include

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

Specified by:

include in class javax.servlet.jsp.PageContext

Throws:

javax.servlet.ServletException

java.io.IOException

getVariableResolver

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

Specified by:

getVariableResolver in class javax.servlet.jsp.JspContext

forward

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

Specified by:

forward in class javax.servlet.jsp.PageContext

Throws:

javax.servlet.ServletException

java.io.IOException

pushBody

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

Overrides:

pushBody in class javax.servlet.jsp.PageContext

pushBody

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

Overrides:

pushBody in class javax.servlet.jsp.JspContext

popBody

public javax.servlet.jsp.JspWriter popBody()

Overrides:

popBody in class javax.servlet.jsp.JspContext

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.

Specified by:

getExpressionEvaluator in class javax.servlet.jsp.JspContext

handlePageException

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

Specified by:

handlePageException in class javax.servlet.jsp.PageContext

Throws:

java.io.IOException

javax.servlet.ServletException

handlePageException

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

Specified by:

handlePageException in class javax.servlet.jsp.PageContext

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