Package org.jboss.modules

Interface ResourceLoader

All Superinterfaces:

AutoCloseable

All Known Subinterfaces:

IterableResourceLoader

All Known Implementing Classes:

AbstractResourceLoader, NativeLibraryResourceLoader

public interface ResourceLoader
extends AutoCloseable

A loader for resources from a specific resource root within a module.

Author:

David M. Lloyd, Richard Opalka

Method Summary

Modifier and Type	Method	Description
default void	close()	Closes this resource, relinquishing any underlying resources.
default ResourceLoader	createSubloader(String relativePath, String rootName)	Create a loader which loads resources under a relative subdirectory relative to this loader.
ClassSpec	getClassSpec(String fileName)	Get the class specification for the given class name.
String	getLibrary(String name)	Get the absolute physical filesystem path for a library with the given name.
default URI	getLocation()	Get the base location of the resources in this loader (if any).
PackageSpec	getPackageSpec(String name)	Get the package specification for the given directory name.
Collection<String>	getPaths()	Get the collection of resource paths.
Resource	getResource(String name)	Get a resource with the given name.
String	getRootName()	Get the name of the root represented by this resource loader.

Method Detail

getRootName

String getRootName()

Get the name of the root represented by this resource loader.

Returns:

the name of the root

getClassSpec

ClassSpec getClassSpec(String fileName)
                throws IOException

Get the class specification for the given class name. If no matching class is found, null is returned.

Parameters:

fileName - the fileName of the class, e.g. for the class org.jboss.modules.ResourceLoader the fileName will be org/jboss/modules/ResourceLoader.class

Returns:

the class specification, or null if the named class is not found

Throws:

IOException - if an I/O error occurs

getPackageSpec

PackageSpec getPackageSpec(String name)
                    throws IOException

Get the package specification for the given directory name. Always returns a package specification; this method cannot be used to test for the existence of a package. A package spec should always be acquired from the same resource loader which provided the class specification. The directory name will always be specified using "/" separators.

Parameters:

name - the directory name

Returns:

the package specification

Throws:

IOException - if an I/O error occurs

getResource

Resource getResource(String name)

Get a resource with the given name. If no such resource is available, null is returned. The resource name will always be specified using "/" separators for the directory segments.

Parameters:

name - the resource name

Returns:

the resource, or null if it is not available

getLibrary

String getLibrary(String name)

Get the absolute physical filesystem path for a library with the given name. The resultant path should be path-separated using "/" characters.

Parameters:

name - the name

Returns:

the path or null if the library is not present

getPaths

Collection<String> getPaths()

Get the collection of resource paths. Called one time only when the resource loader is initialized. The paths should use "/" characters to separate the path segments.

Returns:

the resource paths

close

default void close()

Closes this resource, relinquishing any underlying resources. This method is invoked automatically on objects managed by the try-with-resources statement.

Specified by:

close in interface AutoCloseable

getLocation

default URI getLocation()

Get the base location of the resources in this loader (if any). If the location is not known, or the resource loader does not support locations, or the resource loader does not support this method, null is returned.

Returns:

the base location of the resources in this loader, or null if not available

createSubloader

default ResourceLoader createSubloader(String relativePath,
                                       String rootName)

Create a loader which loads resources under a relative subdirectory relative to this loader. If the resource loader does not support subloaders, null is returned.

Parameters:

relativePath - the relative path

rootName - the name of the subloader's root

Returns:

the resource loader, or null if subloaders are not supported