org.eclipse.rdf4j.common.io

Class ResourceUtil

java.lang.Object

org.eclipse.rdf4j.common.io.ResourceUtil

public class ResourceUtil
extends Object

ResourceUtil is a utility class for retrieving resources (images, property-files, etc) from the classpath.

Constructor Summary

Constructors

Constructor and Description
ResourceUtil()

Method Summary

Modifier and Type	Method and Description
static BufferedImage	getImage(String resourceName) Retrieve an image resource
static ImageIcon	getImageIcon(String resourceName) Retrieve an image icon resource.
static InputStream	getInputStream(String resourceName) Get an inputstream on the specified resource.
static Properties	getProperties(String resourceName) Retrieve a properties resource.
static String	getString(String resourceName) Retrieve the String contents of the specified resource, obtained by opening in inputstream on the resource and then interpreting the bytes contained in the inputstream as if they represented characters.
static URL	getURL(String resourceName) The URL to the specified resource
static Set<URL>	getURLs(String resourceName) Get the URLs for a resource name using the class loaders of the current thread and of the caller.
static void	resourceToFile(String resourceName, File output) Store a resource to a file on the file system.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceUtil

public ResourceUtil()

Method Detail

getURL

public static URL getURL(String resourceName)

The URL to the specified resource

Parameters:

resourceName - the name of the resource

Returns:

the URL to the specified resource, or null if the resource could not be found

getURLs

public static Set<URL> getURLs(String resourceName)
                        throws IOException

Get the URLs for a resource name using the class loaders of the current thread and of the caller.

Parameters:

resourceName -

Returns:

set of URLs

Throws:

IOException

getInputStream

public static InputStream getInputStream(String resourceName)

Get an inputstream on the specified resource.

Parameters:

resourceName - the name of the resource

Returns:

an inputstream on the specified resource, or null if the resource could not be found

getString

public static String getString(String resourceName)
                        throws IOException

Retrieve the String contents of the specified resource, obtained by opening in inputstream on the resource and then interpreting the bytes contained in the inputstream as if they represented characters. This may not make sense on all resources. There is no "magic" in this method to read anything other than plain text.

Parameters:

resourceName - the name of the resource

Returns:

the String contents of the specified resource, or null if the specified resource could not be found

Throws:

IOException - when something goes wrong trying to read the resource

getImageIcon

public static ImageIcon getImageIcon(String resourceName)

Retrieve an image icon resource.

Parameters:

resourceName - the name of the resource

Returns:

an image icon, or null if the specified resource could not be found

getImage

public static BufferedImage getImage(String resourceName)

Retrieve an image resource

Parameters:

resourceName - the name of the resource

Returns:

an image, or null if the specified resource could not be found

getProperties

public static Properties getProperties(String resourceName)
                                throws IOException

Retrieve a properties resource.

Parameters:

resourceName - the name of the resource

Returns:

a Properties object representing the contents of the resource, or null if the specified resource could not be found

Throws:

IOException

resourceToFile

public static void resourceToFile(String resourceName,
                                  File output)
                           throws IOException

Store a resource to a file on the file system.

Parameters:

resourceName - the name of the resource

output - the file to write to

Throws:

IOException - if there was a problem reading the resource or writing to the file