com.ibm.jaggr.core.impl.resource

Class FileResourceFactory

java.lang.Object

com.ibm.jaggr.core.impl.resource.FileResourceFactory

All Implemented Interfaces:

IResourceFactory

public class FileResourceFactory
extends Object
implements IResourceFactory

Default implementation for IResourceFactory that currently supports only file resources.

Constructor Summary

Constructors

Modifier	Constructor and Description
	FileResourceFactory()
protected	FileResourceFactory(ClassLoader classLoader) This constructor is primarily used by tests to mock the ClassLoader

Method Summary

Methods

Modifier and Type	Method and Description
protected Class<?>	getNIOFileResourceClass() Utility method for acquiring a reference to the NIOFileResource class without asking the class loader every single time after we know it's not there.
protected Constructor<?>	getNIOFileResourceConstructor(Class<?>... args) Utility method for acquiring a reference to the NIOFileResource class constructor without asking the class loader every single time after we know it's not there.
protected Object	getNIOInstance(Constructor<?> constructor, Object... args) Utility method to catch class loading issues and prevent repeated attempts to use reflection.
boolean	handles(URI uri)
IResource	newResource(URI uri) Creates a IResource object for the specified URI.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileResourceFactory

public FileResourceFactory()

FileResourceFactory

protected FileResourceFactory(ClassLoader classLoader)

This constructor is primarily used by tests to mock the ClassLoader

Parameters:

classLoader - The class loader to use when looking for NIOFileResource

Method Detail

newResource

public IResource newResource(URI uri)

Description copied from interface: IResourceFactory

Creates a IResource object for the specified URI. This method must not fail due to non-existence of the resource specified by the URL. If the resource doesn't exist, a valid resource object that returns exists() == false and throws an IOException for other methods that require existence of the resource should be returned.

This method is free to convert the provided URI as needed so that the URI returned by IResource.getURI() for the returned object does not need to be the same as the provided URI. For example, the factory may convert a bundleentry URI into a file uri, or else it may need to convert a URI using a pseudo scheme such as namedbundleentry into a URI that is supported by the platform.

Specified by:

newResource in interface IResourceFactory

Parameters:

uri - The resource URI. The concrete implementation of the returned type is determined by the URI scheme.

Returns:

A IResource object for the specified URI. The returned object MUST be serialiable.

handles

public boolean handles(URI uri)

Specified by:

handles in interface IResourceFactory

getNIOFileResourceClass

protected Class<?> getNIOFileResourceClass()

Utility method for acquiring a reference to the NIOFileResource class without asking the class loader every single time after we know it's not there.

Returns:

the NIO class object

getNIOFileResourceConstructor

protected Constructor<?> getNIOFileResourceConstructor(Class<?>... args)

Utility method for acquiring a reference to the NIOFileResource class constructor without asking the class loader every single time after we know it's not there.

Parameters:

args - The constructor argument types

Returns:

the constructor object

getNIOInstance

protected Object getNIOInstance(Constructor<?> constructor,
                    Object... args)
                         throws InstantiationException,
                                IllegalAccessException,
                                IllegalArgumentException,
                                InvocationTargetException

Utility method to catch class loading issues and prevent repeated attempts to use reflection.

Parameters:

constructor - The constructor to invoke

args - The args to pass the constructor

Returns:

The instance.

Throws:

InstantiationException

IllegalAccessException

IllegalArgumentException

InvocationTargetException