Package org.apache.tapestry5.http.internal.services

Class ContextImpl

java.lang.Object

org.apache.tapestry5.http.internal.services.ContextImpl

All Implemented Interfaces:

Context

public class ContextImpl
extends Object
implements Context

Constructor Summary

Constructors

Constructor	Description
ContextImpl(ServletContext servletContext)

Method Summary

Modifier and Type	Method	Description
Object	getAttribute(String name)	Returns an attribute previously stored into the context with the given name.
List<String>	getAttributeNames()	Returns the names of all attributes of the context, sorted alphabetically.
String	getInitParameter(String name)	Returns an initial parameter value defined by servlet.
String	getMimeType(String file)	Returns the MIME content type of the specified file, or null if no content type is known.
File	getRealFile(String path)	Attempts to find the actual file, on the file system, that would be provided by the servlet container for the given path (which must start with a leading slash).
URL	getResource(String path)	Returns a URL to a resource stored within the context.
List<String>	getResourcePaths(String path)	Looks for resources within the web application within the supplied path.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContextImpl

public ContextImpl(ServletContext servletContext)

Method Detail

getResource

public URL getResource(String path)

Description copied from interface: Context

Returns a URL to a resource stored within the context. The path should start with a leading slash.

Specified by:

getResource in interface Context

Parameters:

path - to the resource (with a leading slash)

Returns:

the URL for the path, or null if the path does not correspond to a file.

getRealFile

public File getRealFile(String path)

Description copied from interface: Context

Attempts to find the actual file, on the file system, that would be provided by the servlet container for the given path (which must start with a leading slash). This may return null if no such file exists, or if the resource in question is packaged inside a WAR. If packaged inside a WAR, the contents may be accessed via Context.getResource(String).

Specified by:

getRealFile in interface Context

Parameters:

path - to the resource (with a leading slash)

Returns:

the underlying File, or null if no such file

getInitParameter

public String getInitParameter(String name)

Description copied from interface: Context

Returns an initial parameter value defined by servlet.

Specified by:

getInitParameter in interface Context

getResourcePaths

public List<String> getResourcePaths(String path)

Description copied from interface: Context

Looks for resources within the web application within the supplied path. The list will be recurively expanded, as necessary. The path must start with a leading slash, and usually ends with a slash as well.

Specified by:

getResourcePaths in interface Context

Parameters:

path - to search for (should start with a leading slash)

Returns:

the matches, sorted alphabetically

getAttribute

public Object getAttribute(String name)

Description copied from interface: Context

Returns an attribute previously stored into the context with the given name.

Specified by:

getAttribute in interface Context

Parameters:

name - used to retrieve the attribute

Returns:

the attribute, or null if not found

getAttributeNames

public List<String> getAttributeNames()

Description copied from interface: Context

Returns the names of all attributes of the context, sorted alphabetically.

Specified by:

getAttributeNames in interface Context

getMimeType

public String getMimeType(String file)

Description copied from interface: Context

Returns the MIME content type of the specified file, or null if no content type is known. MIME types are built-in to servlet containers and may be futher specified via the web application deployment descriptor.

Specified by:

getMimeType in interface Context

Parameters:

file - name of file

Returns:

the presumed MIME content type, or null if not known