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PortletContextResource (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.portlet.context
Class PortletContextResource

java.lang.Object
  org.springframework.core.io.AbstractResource
      org.springframework.web.portlet.context.PortletContextResource

All Implemented Interfaces:

InputStreamSource, Resource

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public class PortletContextResource
extends AbstractResource

Resource implementation for PortletContext resources, interpreting relative paths within the portlet application root.

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

Since:

2.0

Author:

Juergen Hoeller, John A. Lewis

See Also:

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

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Constructor Summary
PortletContextResource(PortletContext portletContext, String path)           Create a new PortletContextResource.

 

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()           Return a description for this resource, to be used for error output when working with the resource.
File	getFile()           This implementation delegates to PortletContext.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 PortletContext.getResourceAsStream, but throws a FileNotFoundException if not found.
String	getPath()           Return the path for this resource.
PortletContext	getPortletContext()           Return the PortletContext 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

PortletContextResource

public PortletContextResource(PortletContext portletContext,
                              String path)

Create a new PortletContextResource.

The Portlet 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:

portletContext - the PortletContext to load from

path - the path of the resource

Method Detail

getPortletContext

public PortletContext getPortletContext()

Return the PortletContext for this resource.

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getPath

public String getPath()

Return the path for this resource.

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getInputStream

public InputStream getInputStream()
                           throws IOException

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

Throws:

IOException - if the stream could not be opened

See Also:

PortletContext.getResourceAsStream(java.lang.String)

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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

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getFile

public File getFile()
             throws IOException

This implementation delegates to PortletContext.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:

PortletContext.getRealPath(java.lang.String)

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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

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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

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getDescription

public String getDescription()

Description copied from interface: Resource

Return a description for this resource, to be used for error output when working with the resource.

Implementations are also encouraged to return this value from their toString method.

See Also:

Object.toString()

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equals

public boolean equals(Object obj)

Description copied from class: AbstractResource

This implementation compares description strings.

Overrides:

equals in class AbstractResource

See Also:

Resource.getDescription()

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hashCode

public int hashCode()

Description copied from class: AbstractResource

This implementation returns the description's hash code.

Overrides:

hashCode in class AbstractResource

See Also:

Resource.getDescription()

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