org.apache.jasper.runtime

Class PageContextImpl

java.lang.Object

jakarta.servlet.jsp.JspContext

jakarta.servlet.jsp.PageContext

org.apache.jasper.runtime.PageContextImpl

public class PageContextImpl
extends jakarta.servlet.jsp.PageContext

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, Jacob Hookom

Field Summary

Fields inherited from class jakarta.servlet.jsp.PageContext

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

Method Summary

Modifier and Type	Method and Description
Object	findAttribute(String name)
void	forward(String relativeUrlPath)
Object	getAttribute(String name)
Object	getAttribute(String name, int scope)
Enumeration<String>	getAttributeNamesInScope(int scope)
int	getAttributesScope(String name)
jakarta.el.ELContext	getELContext()
Exception	getException() Returns the exception associated with this page context, if any.
jakarta.servlet.jsp.el.ExpressionEvaluator	getExpressionEvaluator() Deprecated.
jakarta.servlet.jsp.JspWriter	getOut()
Object	getPage()
jakarta.servlet.ServletRequest	getRequest()
jakarta.servlet.ServletResponse	getResponse()
jakarta.servlet.ServletConfig	getServletConfig()
jakarta.servlet.ServletContext	getServletContext()
jakarta.servlet.http.HttpSession	getSession()
jakarta.servlet.jsp.el.VariableResolver	getVariableResolver() Deprecated.
void	handlePageException(Exception ex)
void	handlePageException(Throwable t)
void	include(String relativeUrlPath)
void	include(String relativeUrlPath, boolean flush)
void	initialize(jakarta.servlet.Servlet servlet, jakarta.servlet.ServletRequest request, jakarta.servlet.ServletResponse response, String errorPageURL, boolean needsSession, int bufferSize, boolean autoFlush)
jakarta.servlet.jsp.JspWriter	popBody()
static Object	proprietaryEvaluate(String expression, Class<?> expectedType, jakarta.servlet.jsp.PageContext pageContext, ProtectedFunctionMapper functionMap) Proprietary method to evaluate EL expressions.
jakarta.servlet.jsp.tagext.BodyContent	pushBody()
jakarta.servlet.jsp.JspWriter	pushBody(Writer writer)
void	release()
void	removeAttribute(String name)
void	removeAttribute(String name, int scope)
void	setAttribute(String name, Object attribute)
void	setAttribute(String name, Object o, int scope)

Methods inherited from class jakarta.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(jakarta.servlet.Servlet servlet,
                       jakarta.servlet.ServletRequest request,
                       jakarta.servlet.ServletResponse response,
                       String errorPageURL,
                       boolean needsSession,
                       int bufferSize,
                       boolean autoFlush)
                throws IOException

Specified by:

initialize in class jakarta.servlet.jsp.PageContext

Throws:

IOException

release

public void release()

Specified by:

release in class jakarta.servlet.jsp.PageContext

getAttribute

public Object getAttribute(String name)

Specified by:

getAttribute in class jakarta.servlet.jsp.JspContext

getAttribute

public Object getAttribute(String name,
                           int scope)

Specified by:

getAttribute in class jakarta.servlet.jsp.JspContext

setAttribute

public void setAttribute(String name,
                         Object attribute)

Specified by:

setAttribute in class jakarta.servlet.jsp.JspContext

setAttribute

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

Specified by:

setAttribute in class jakarta.servlet.jsp.JspContext

removeAttribute

public void removeAttribute(String name,
                            int scope)

Specified by:

removeAttribute in class jakarta.servlet.jsp.JspContext

getAttributesScope

public int getAttributesScope(String name)

Specified by:

getAttributesScope in class jakarta.servlet.jsp.JspContext

findAttribute

public Object findAttribute(String name)

Specified by:

findAttribute in class jakarta.servlet.jsp.JspContext

getAttributeNamesInScope

public Enumeration<String> getAttributeNamesInScope(int scope)

Specified by:

getAttributeNamesInScope in class jakarta.servlet.jsp.JspContext

removeAttribute

public void removeAttribute(String name)

Specified by:

removeAttribute in class jakarta.servlet.jsp.JspContext

getOut

public jakarta.servlet.jsp.JspWriter getOut()

Specified by:

getOut in class jakarta.servlet.jsp.JspContext

getSession

public jakarta.servlet.http.HttpSession getSession()

Specified by:

getSession in class jakarta.servlet.jsp.PageContext

getServletConfig

public jakarta.servlet.ServletConfig getServletConfig()

Specified by:

getServletConfig in class jakarta.servlet.jsp.PageContext

getServletContext

public jakarta.servlet.ServletContext getServletContext()

Specified by:

getServletContext in class jakarta.servlet.jsp.PageContext

getRequest

public jakarta.servlet.ServletRequest getRequest()

Specified by:

getRequest in class jakarta.servlet.jsp.PageContext

getResponse

public jakarta.servlet.ServletResponse getResponse()

Specified by:

getResponse in class jakarta.servlet.jsp.PageContext

getException

public 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 jakarta.servlet.jsp.PageContext

Returns:

The Exception associated with this page context, if any.

getPage

public Object getPage()

Specified by:

getPage in class jakarta.servlet.jsp.PageContext

include

public void include(String relativeUrlPath)
             throws jakarta.servlet.ServletException,
                    IOException

Specified by:

include in class jakarta.servlet.jsp.PageContext

Throws:

jakarta.servlet.ServletException

IOException

include

public void include(String relativeUrlPath,
                    boolean flush)
             throws jakarta.servlet.ServletException,
                    IOException

Specified by:

include in class jakarta.servlet.jsp.PageContext

Throws:

jakarta.servlet.ServletException

IOException

getVariableResolver

@Deprecated
public jakarta.servlet.jsp.el.VariableResolver getVariableResolver()

Deprecated.

Specified by:

getVariableResolver in class jakarta.servlet.jsp.JspContext

forward

public void forward(String relativeUrlPath)
             throws jakarta.servlet.ServletException,
                    IOException

Specified by:

forward in class jakarta.servlet.jsp.PageContext

Throws:

jakarta.servlet.ServletException

IOException

pushBody

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

Overrides:

pushBody in class jakarta.servlet.jsp.PageContext

pushBody

public jakarta.servlet.jsp.JspWriter pushBody(Writer writer)

Overrides:

pushBody in class jakarta.servlet.jsp.JspContext

popBody

public jakarta.servlet.jsp.JspWriter popBody()

Overrides:

popBody in class jakarta.servlet.jsp.JspContext

getExpressionEvaluator

@Deprecated
public jakarta.servlet.jsp.el.ExpressionEvaluator getExpressionEvaluator()

Deprecated.

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 jakarta.servlet.jsp.JspContext

handlePageException

public void handlePageException(Exception ex)
                         throws IOException,
                                jakarta.servlet.ServletException

Specified by:

handlePageException in class jakarta.servlet.jsp.PageContext

Throws:

IOException

jakarta.servlet.ServletException

handlePageException

public void handlePageException(Throwable t)
                         throws IOException,
                                jakarta.servlet.ServletException

Specified by:

handlePageException in class jakarta.servlet.jsp.PageContext

Throws:

IOException

jakarta.servlet.ServletException

proprietaryEvaluate

public static Object proprietaryEvaluate(String expression,
                                         Class<?> expectedType,
                                         jakarta.servlet.jsp.PageContext pageContext,
                                         ProtectedFunctionMapper functionMap)
                                  throws jakarta.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:

jakarta.el.ELException

getELContext

public jakarta.el.ELContext getELContext()

Specified by:

getELContext in class jakarta.servlet.jsp.JspContext