org.apache.jasper.servlet
Class JspCServletContext

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

All Implemented Interfaces:

javax.servlet.ServletContext

public class JspCServletContext
extends java.lang.Object
implements javax.servlet.ServletContext

Simple ServletContext implementation without HTTP-specific methods.

Author:

Peter Rossbach (pr@webapp.de)

myAttributes

protected java.util.Hashtable myAttributes

Servlet context attributes.

myLogWriter

protected java.io.PrintWriter myLogWriter

The log writer we will write log messages to.

myResourceBaseURL

protected java.net.URL myResourceBaseURL

The base URL (document root) for this context.

JspCServletContext

public JspCServletContext(java.io.PrintWriter aLogWriter,
                          java.net.URL aResourceBaseURL)

Create a new instance of this ServletContext implementation.

Parameters:

aLogWriter - PrintWriter which is used for log() calls

aResourceBaseURL - Resource base URL

getAttribute

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

Return the specified context attribute, if any.

Specified by:

getAttribute in interface javax.servlet.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 java.util.Enumeration getAttributeNames()

Return an enumeration of context attribute names.

Specified by:

getAttributeNames in interface javax.servlet.ServletContext

Returns:

an Enumeration of attribute names

See Also:

ServletContext.getAttribute(java.lang.String)

getContext

public javax.servlet.ServletContext getContext(java.lang.String uripath)

Return the servlet context for the specified path.

Specified by:

getContext in interface javax.servlet.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 java.lang.String getContextPath()

Return the context path.

Specified by:

getContextPath in interface javax.servlet.ServletContext

getInitParameter

public java.lang.String getInitParameter(java.lang.String name)

Return the specified context initialization parameter.

Specified by:

getInitParameter in interface javax.servlet.ServletContext

Parameters:

name - Name of the requested parameter

Returns:

a String containing the value of the initialization parameter

See Also:

ServletConfig.getInitParameter(java.lang.String)

getInitParameterNames

public java.util.Enumeration getInitParameterNames()

Return an enumeration of the names of context initialization parameters.

Specified by:

getInitParameterNames in interface javax.servlet.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 javax.servlet.ServletContext

Returns:

2

getMimeType

public java.lang.String getMimeType(java.lang.String file)

Return the MIME type for the specified filename.

Specified by:

getMimeType in interface javax.servlet.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 javax.servlet.ServletContext

Returns:

5

getNamedDispatcher

public javax.servlet.RequestDispatcher getNamedDispatcher(java.lang.String name)

Return a request dispatcher for the specified servlet name.

Specified by:

getNamedDispatcher in interface javax.servlet.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 java.lang.String getRealPath(java.lang.String path)

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

Specified by:

getRealPath in interface javax.servlet.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 javax.servlet.RequestDispatcher getRequestDispatcher(java.lang.String path)

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

Specified by:

getRequestDispatcher in interface javax.servlet.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 java.net.URL getResource(java.lang.String path)
                         throws java.net.MalformedURLException

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

Specified by:

getResource in interface javax.servlet.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:

java.net.MalformedURLException - if the resource path is not properly formed

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String path)

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

Specified by:

getResourceAsStream in interface javax.servlet.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 java.util.Set getResourcePaths(java.lang.String path)

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

Specified by:

getResourcePaths in interface javax.servlet.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 java.lang.String getServerInfo()

Return descriptive information about this server.

Specified by:

getServerInfo in interface javax.servlet.ServletContext

Returns:

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

getServlet

public javax.servlet.Servlet getServlet(java.lang.String name)
                                 throws javax.servlet.ServletException

Deprecated. This method has been deprecated with no replacement

Return a null reference for the specified servlet name.

Specified by:

getServlet in interface javax.servlet.ServletContext

Parameters:

name - Name of the requested servlet

Throws:

javax.servlet.ServletException

getServletContextName

public java.lang.String getServletContextName()

Return the name of this servlet context.

Specified by:

getServletContextName in interface javax.servlet.ServletContext

Returns:

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

getServletNames

public java.util.Enumeration getServletNames()

Deprecated. This method has been deprecated with no replacement

Return an empty enumeration of servlet names.

Specified by:

getServletNames in interface javax.servlet.ServletContext

getServlets

public java.util.Enumeration getServlets()

Deprecated. This method has been deprecated with no replacement

Return an empty enumeration of servlets.

Specified by:

getServlets in interface javax.servlet.ServletContext

log

public void log(java.lang.String message)

Log the specified message.

Specified by:

log in interface javax.servlet.ServletContext

Parameters:

message - The message to be logged

log

public void log(java.lang.Exception exception,
                java.lang.String message)

Deprecated. Use log(String,Throwable) instead

Log the specified message and exception.

Specified by:

log in interface javax.servlet.ServletContext

Parameters:

exception - The exception to be logged

message - The message to be logged

log

public void log(java.lang.String message,
                java.lang.Throwable exception)

Log the specified message and exception.

Specified by:

log in interface javax.servlet.ServletContext

Parameters:

message - The message to be logged

exception - The exception to be logged

removeAttribute

public void removeAttribute(java.lang.String name)

Remove the specified context attribute.

Specified by:

removeAttribute in interface javax.servlet.ServletContext

Parameters:

name - Name of the attribute to remove

setAttribute

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

Set or replace the specified context attribute.

Specified by:

setAttribute in interface javax.servlet.ServletContext

Parameters:

name - Name of the context attribute to set

value - Corresponding attribute value

setInitParameter

public boolean setInitParameter(java.lang.String name,
                                java.lang.String value)