org.apache.jasper.servlet
Class JspCServletContext

java.lang.Object
  org.apache.jasper.servlet.JspCServletContext

All Implemented Interfaces:

ServletContext

public class JspCServletContext
extends Object
implements ServletContext

Simple ServletContext implementation without HTTP-specific methods.

Author:

Peter Rossbach (pr@webapp.de)

Field Summary

protected Hashtable<String,Object>	myAttributes Servlet context attributes.
protected PrintWriter	myLogWriter The log writer we will write log messages to.
protected URL	myResourceBaseURL The base URL (document root) for this context.

Fields inherited from interface javax.servlet.ServletContext

ORDERED_LIBS, TEMPDIR

Constructor Summary

JspCServletContext(PrintWriter aLogWriter, URL aResourceBaseURL)
Create a new instance of this ServletContext implementation.

Method Summary

FilterRegistration.Dynamic	addFilter(String filterName, Class<? extends Filter> filterClass)
FilterRegistration.Dynamic	addFilter(String filterName, Filter filter)
FilterRegistration.Dynamic	addFilter(String filterName, String className)
void	addListener(Class<? extends EventListener> listenerClass)
void	addListener(String className)
<T extends EventListener> void	addListener(T t)
ServletRegistration.Dynamic	addServlet(String servletName, Class<? extends Servlet> servletClass)
ServletRegistration.Dynamic	addServlet(String servletName, Servlet servlet)
ServletRegistration.Dynamic	addServlet(String servletName, String className)
<T extends Filter> T	createFilter(Class<T> c)
<T extends EventListener> T	createListener(Class<T> c)
<T extends Servlet> T	createServlet(Class<T> c)
void	declareRoles(String... roleNames)
Object	getAttribute(String name) Return the specified context attribute, if any.
Enumeration<String>	getAttributeNames() Return an enumeration of context attribute names.
ClassLoader	getClassLoader()
ServletContext	getContext(String uripath) Return the servlet context for the specified path.
String	getContextPath() Return the context path.
Set<SessionTrackingMode>	getDefaultSessionTrackingModes()
int	getEffectiveMajorVersion()
int	getEffectiveMinorVersion()
Set<SessionTrackingMode>	getEffectiveSessionTrackingModes()
FilterRegistration	getFilterRegistration(String filterName)
Map<String,? extends FilterRegistration>	getFilterRegistrations()
String	getInitParameter(String name) Return the specified context initialization parameter.
Enumeration<String>	getInitParameterNames() Return an enumeration of the names of context initialization parameters.
JspConfigDescriptor	getJspConfigDescriptor()
int	getMajorVersion() Return the Servlet API major version number.
String	getMimeType(String file) Return the MIME type for the specified filename.
int	getMinorVersion() Return the Servlet API minor version number.
RequestDispatcher	getNamedDispatcher(String name) Return a request dispatcher for the specified servlet name.
String	getRealPath(String path) Return the real path for the specified context-relative virtual path.
RequestDispatcher	getRequestDispatcher(String path) Return a request dispatcher for the specified context-relative path.
URL	getResource(String path) Return a URL object of a resource that is mapped to the specified context-relative path.
InputStream	getResourceAsStream(String path) Return an InputStream allowing access to the resource at the specified context-relative path.
Set<String>	getResourcePaths(String path) Return the set of resource paths for the "directory" at the specified context path.
String	getServerInfo() Return descriptive information about this server.
Servlet	getServlet(String name) Deprecated. This method has been deprecated with no replacement
String	getServletContextName() Return the name of this servlet context.
Enumeration<String>	getServletNames() Deprecated. This method has been deprecated with no replacement
ServletRegistration	getServletRegistration(String servletName)
Map<String,? extends ServletRegistration>	getServletRegistrations()
Enumeration<Servlet>	getServlets() Deprecated. This method has been deprecated with no replacement
SessionCookieConfig	getSessionCookieConfig()
void	log(Exception exception, String message) Deprecated. Use log(String,Throwable) instead
void	log(String message) Log the specified message.
void	log(String message, Throwable exception) Log the specified message and exception.
void	removeAttribute(String name) Remove the specified context attribute.
void	setAttribute(String name, Object value) Set or replace the specified context attribute.
boolean	setInitParameter(String name, String value)
void	setSessionTrackingModes(Set<SessionTrackingMode> sessionTrackingModes)

Methods inherited from class java.lang.Object

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

Field Detail

myAttributes

protected Hashtable<String,Object> myAttributes

Servlet context attributes.

myLogWriter

protected PrintWriter myLogWriter

The log writer we will write log messages to.

myResourceBaseURL

protected URL myResourceBaseURL

The base URL (document root) for this context.

Constructor Detail

JspCServletContext

public JspCServletContext(PrintWriter aLogWriter,
                          URL aResourceBaseURL)

Create a new instance of this ServletContext implementation.

Parameters:

aLogWriter - PrintWriter which is used for log() calls

aResourceBaseURL - Resource base URL

Method Detail

getAttribute

public Object getAttribute(String name)

Return the specified context attribute, if any.

Specified by:

getAttribute in interface ServletContext

Parameters:

name - Name of the requested attribute

Returns:

an Object containing the value of the attribute, or null if no attribute exists matching the given name

See Also:

ServletContext.getAttributeNames()

getAttributeNames

public Enumeration<String> getAttributeNames()

Return an enumeration of context attribute names.

Specified by:

getAttributeNames in interface ServletContext

Returns:

an Enumeration of attribute names

See Also:

ServletContext.getAttribute(java.lang.String)

getContext

public ServletContext getContext(String uripath)

Return the servlet context for the specified path.

Specified by:

getContext in interface ServletContext

Parameters:

uripath - Server-relative path starting with '/'

Returns:

the ServletContext object that corresponds to the named URL, or null if either none exists or the container wishes to restrict this access.

See Also:

RequestDispatcher

getContextPath

public String getContextPath()

Return the context path.

Specified by:

getContextPath in interface ServletContext

getInitParameter

public String getInitParameter(String name)

Return the specified context initialization parameter.

Specified by:

getInitParameter in interface ServletContext

Parameters:

name - Name of the requested parameter

Returns:

a String containing at least the servlet container name and version number

See Also:

ServletConfig.getInitParameter(java.lang.String)

getInitParameterNames

public Enumeration<String> getInitParameterNames()

Return an enumeration of the names of context initialization parameters.

Specified by:

getInitParameterNames in interface ServletContext

Returns:

an Enumeration of String objects containing the names of the context's initialization parameters

See Also:

ServletConfig.getInitParameter(java.lang.String)

getMajorVersion

public int getMajorVersion()

Return the Servlet API major version number.

Specified by:

getMajorVersion in interface ServletContext

Returns:

3

getMimeType

public String getMimeType(String file)

Return the MIME type for the specified filename.

Specified by:

getMimeType in interface ServletContext

Parameters:

file - Filename whose MIME type is requested

Returns:

a String specifying the file's MIME type

getMinorVersion

public int getMinorVersion()

Return the Servlet API minor version number.

Specified by:

getMinorVersion in interface ServletContext

Returns:

0

getNamedDispatcher

public RequestDispatcher getNamedDispatcher(String name)

Return a request dispatcher for the specified servlet name.

Specified by:

getNamedDispatcher in interface ServletContext

Parameters:

name - Name of the requested servlet

Returns:

a RequestDispatcher object that acts as a wrapper for the named servlet, or null if the ServletContext cannot return a RequestDispatcher

See Also:

RequestDispatcher, ServletContext.getContext(java.lang.String), ServletConfig.getServletName()

getRealPath

public String getRealPath(String path)

Return the real path for the specified context-relative virtual path.

Specified by:

getRealPath in interface ServletContext

Parameters:

path - The context-relative virtual path to resolve

Returns:

a String specifying the real path, or null if the translation cannot be performed

getRequestDispatcher

public RequestDispatcher getRequestDispatcher(String path)

Return a request dispatcher for the specified context-relative path.

Specified by:

getRequestDispatcher in interface ServletContext

Parameters:

path - Context-relative path for which to acquire a dispatcher

Returns:

a RequestDispatcher object that acts as a wrapper for the resource at the specified path, or null if the ServletContext cannot return a RequestDispatcher

See Also:

RequestDispatcher, ServletContext.getContext(java.lang.String)

getResource

public URL getResource(String path)
                throws MalformedURLException

Return a URL object of a resource that is mapped to the specified context-relative path.

Specified by:

getResource in interface ServletContext

Parameters:

path - Context-relative path of the desired resource

Returns:

the resource located at the named path, or null if there is no resource at that path

Throws:

MalformedURLException - if the resource path is not properly formed

getResourceAsStream

public InputStream getResourceAsStream(String path)

Return an InputStream allowing access to the resource at the specified context-relative path.

Specified by:

getResourceAsStream in interface ServletContext

Parameters:

path - Context-relative path of the desired resource

Returns:

the InputStream returned to the servlet, or null if no resource exists at the specified path

getResourcePaths

public Set<String> getResourcePaths(String path)

Return the set of resource paths for the "directory" at the specified context path.

Specified by:

getResourcePaths in interface ServletContext

Parameters:

path - Context-relative base path

Returns:

a Set containing the directory listing, or null if there are no resources in the web application whose path begins with the supplied path.

getServerInfo

public String getServerInfo()

Return descriptive information about this server.

Specified by:

getServerInfo in interface ServletContext

Returns:

a String containing at least the servlet container name and version number

getServlet

@Deprecated
public Servlet getServlet(String name)
                   throws ServletException

Deprecated. This method has been deprecated with no replacement

Return a null reference for the specified servlet name.

Specified by:

getServlet in interface ServletContext

Parameters:

name - Name of the requested servlet

Throws:

ServletException

getServletContextName

public String getServletContextName()

Return the name of this servlet context.

Specified by:

getServletContextName in interface ServletContext

Returns:

The name of the web application or null if no name has been declared in the deployment descriptor.

getServletNames

@Deprecated
public Enumeration<String> getServletNames()

Deprecated. This method has been deprecated with no replacement

Return an empty enumeration of servlet names.

Specified by:

getServletNames in interface ServletContext

getServlets

@Deprecated
public Enumeration<Servlet> getServlets()

Deprecated. This method has been deprecated with no replacement

Return an empty enumeration of servlets.

Specified by:

getServlets in interface ServletContext

log

public void log(String message)

Log the specified message.

Specified by:

log in interface ServletContext

Parameters:

message - The message to be logged

log

@Deprecated
public void log(Exception exception,
                           String message)

Deprecated. Use log(String,Throwable) instead

Log the specified message and exception.

Specified by:

log in interface ServletContext

Parameters:

exception - The exception to be logged

message - The message to be logged

log

public void log(String message,
                Throwable exception)

Log the specified message and exception.

Specified by:

log in interface ServletContext

Parameters:

message - The message to be logged

exception - The exception to be logged

removeAttribute

public void removeAttribute(String name)

Remove the specified context attribute.

Specified by:

removeAttribute in interface ServletContext

Parameters:

name - Name of the attribute to remove

setAttribute

public void setAttribute(String name,
                         Object value)

Set or replace the specified context attribute.

Specified by:

setAttribute in interface ServletContext

Parameters:

name - Name of the context attribute to set

value - Corresponding attribute value

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
                                            String className)

Specified by:

addFilter in interface ServletContext

Returns:

TODO

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
                                              String className)

Specified by:

addServlet in interface ServletContext

Returns:

TODO

getDefaultSessionTrackingModes

public Set<SessionTrackingMode> getDefaultSessionTrackingModes()

Specified by:

getDefaultSessionTrackingModes in interface ServletContext

Returns:

TODO

getEffectiveSessionTrackingModes

public Set<SessionTrackingMode> getEffectiveSessionTrackingModes()

Specified by:

getEffectiveSessionTrackingModes in interface ServletContext

Returns:

TODO

getSessionCookieConfig

public SessionCookieConfig getSessionCookieConfig()

Specified by:

getSessionCookieConfig in interface ServletContext

Returns:

TODO

setSessionTrackingModes

public void setSessionTrackingModes(Set<SessionTrackingMode> sessionTrackingModes)

Specified by:

setSessionTrackingModes in interface ServletContext

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
                                            Filter filter)

Specified by:

addFilter in interface ServletContext

Returns:

TODO

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
                                            Class<? extends Filter> filterClass)

Specified by:

addFilter in interface ServletContext

Returns:

TODO

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
                                              Servlet servlet)

Specified by:

addServlet in interface ServletContext

Returns:

TODO

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
                                              Class<? extends Servlet> servletClass)

Specified by:

addServlet in interface ServletContext

Returns:

TODO

createFilter

public <T extends Filter> T createFilter(Class<T> c)
                              throws ServletException

Specified by:

createFilter in interface ServletContext

Returns:

TODO

Throws:

ServletException

createServlet

public <T extends Servlet> T createServlet(Class<T> c)
                                throws ServletException

Specified by:

createServlet in interface ServletContext

Returns:

TODO

Throws:

ServletException

getFilterRegistration

public FilterRegistration getFilterRegistration(String filterName)

Specified by:

getFilterRegistration in interface ServletContext

Returns:

TODO

getServletRegistration

public ServletRegistration getServletRegistration(String servletName)

Specified by:

getServletRegistration in interface ServletContext

Returns:

TODO

setInitParameter

public boolean setInitParameter(String name,
                                String value)

Specified by:

setInitParameter in interface ServletContext

Returns:

TODO

addListener

public void addListener(Class<? extends EventListener> listenerClass)

Specified by:

addListener in interface ServletContext

addListener

public void addListener(String className)

Specified by:

addListener in interface ServletContext

addListener

public <T extends EventListener> void addListener(T t)

Specified by:

addListener in interface ServletContext

createListener

public <T extends EventListener> T createListener(Class<T> c)
                                       throws ServletException

Specified by:

createListener in interface ServletContext

Returns:

TODO

Throws:

ServletException

declareRoles

public void declareRoles(String... roleNames)

Specified by:

declareRoles in interface ServletContext

getClassLoader

public ClassLoader getClassLoader()

Specified by:

getClassLoader in interface ServletContext

Returns:

TODO

getEffectiveMajorVersion

public int getEffectiveMajorVersion()

Specified by:

getEffectiveMajorVersion in interface ServletContext

Returns:

TODO

getEffectiveMinorVersion

public int getEffectiveMinorVersion()

Specified by:

getEffectiveMinorVersion in interface ServletContext

Returns:

TODO

getFilterRegistrations

public Map<String,? extends FilterRegistration> getFilterRegistrations()

Specified by:

getFilterRegistrations in interface ServletContext

Returns:

TODO

getJspConfigDescriptor

public JspConfigDescriptor getJspConfigDescriptor()

Specified by:

getJspConfigDescriptor in interface ServletContext

Returns:

TODO

getServletRegistrations

public Map<String,? extends ServletRegistration> getServletRegistrations()

Specified by:

getServletRegistrations in interface ServletContext

Returns:

TODO