org.springframework.web.context.support
Class ServletContextResource

java.lang.Object
  org.springframework.core.io.AbstractResource
      org.springframework.web.context.support.ServletContextResource

All Implemented Interfaces:

InputStreamSource, Resource

public class ServletContextResource
extends AbstractResource

Resource implementation for ServletContext resources, interpreting relative paths within the web application root.

Always supports stream access, but only allows java.io.File access when the web application archive is expanded. Always supports resolution as URL.

Since:

28.12.2003

Author:

Juergen Hoeller

See Also:

ServletContext.getResourceAsStream(java.lang.String), ServletContext.getRealPath(java.lang.String)

Constructor Summary

ServletContextResource(ServletContext servletContext, String path)
Create a new ServletContextResource.

Method Summary

Resource	createRelative(String relativePath) This implementation throws a FileNotFoundException, assuming that relative resources cannot be created for this resource.
boolean	equals(Object obj) This implementation compares description strings.
String	getDescription() This abstract method declaration shadows the method in the Resource interface.
File	getFile() This implementation delegates to ServletContext.getRealPath, but throws a FileNotFoundException if not found or not resolvable.
String	getFilename() This implementation always throws IllegalStateException, assuming that the resource does not carry a filename.
InputStream	getInputStream() This implementation delegates to ServletContext.getResourceAsStream, but throws a FileNotFoundException if not found.
String	getPath() Return the path for this resource.
ServletContext	getServletContext() Return the ServletContext for this resource.
URL	getURL() This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to a URL.
int	hashCode() This implementation returns the description's hash code.

Methods inherited from class org.springframework.core.io.AbstractResource

exists, isOpen, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ServletContextResource

public ServletContextResource(ServletContext servletContext,
                              String path)

Create a new ServletContextResource.

The Servlet spec requires that resource paths start with a slash, even if many containers accept paths without leading slash too. Consequently, the given path will be prepended with a slash if it doesn't already start with one.

Parameters:

servletContext - the ServletContext to load from

path - the path of the resource

Method Detail

getServletContext

public ServletContext getServletContext()

Return the ServletContext for this resource.

getPath

public String getPath()

Return the path for this resource.

getInputStream

public InputStream getInputStream()
                           throws IOException

This implementation delegates to ServletContext.getResourceAsStream, but throws a FileNotFoundException if not found.

Throws:

IOException - if the stream could not be opened

See Also:

ServletContext.getResourceAsStream(java.lang.String)

getURL

public URL getURL()
           throws IOException

Description copied from class: AbstractResource

This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to a URL.

Specified by:

getURL in interface Resource

Overrides:

getURL in class AbstractResource

Throws:

IOException - if the resource cannot be resolved as URL, i.e. if the resource is not available as descriptor

getFile

public File getFile()
             throws IOException

This implementation delegates to ServletContext.getRealPath, but throws a FileNotFoundException if not found or not resolvable.

Specified by:

getFile in interface Resource

Overrides:

getFile in class AbstractResource

Throws:

IOException - if the resource cannot be resolved as absolute file path, i.e. if the resource is not available in a file system

See Also:

ServletContext.getRealPath(java.lang.String)

createRelative

public Resource createRelative(String relativePath)
                        throws IOException

Description copied from class: AbstractResource

This implementation throws a FileNotFoundException, assuming that relative resources cannot be created for this resource.

Specified by:

createRelative in interface Resource

Overrides:

createRelative in class AbstractResource

Parameters:

relativePath - the relative path (relative to this resource)

Returns:

the resource handle for the relative resource

Throws:

IOException - if the relative resource cannot be determined

getFilename

public String getFilename()

Description copied from class: AbstractResource

This implementation always throws IllegalStateException, assuming that the resource does not carry a filename.

Specified by:

getFilename in interface Resource

Overrides:

getFilename in class AbstractResource

getDescription

public String getDescription()

Description copied from class: AbstractResource

This abstract method declaration shadows the method in the Resource interface. This is necessary to make the toString implementation in this class work on Sun's JDK 1.3 classic VM, which can't find the getDescription method when executing toString else.

Specified by:

getDescription in interface Resource

Specified by:

getDescription in class AbstractResource

See Also:

Resource.getDescription()

equals

public boolean equals(Object obj)

Description copied from class: AbstractResource

This implementation compares description strings.

Overrides:

equals in class AbstractResource

See Also:

AbstractResource.getDescription()

hashCode

public int hashCode()

Description copied from class: AbstractResource

This implementation returns the description's hash code.

Overrides:

hashCode in class AbstractResource

See Also:

AbstractResource.getDescription()