org.milyn.resource
Class ServletResourceLocator

java.lang.Object
  org.milyn.resource.ServletResourceLocator

All Implemented Interfaces:

ContainerResourceLocator, ExternalResourceLocator

public class ServletResourceLocator
extends Object
implements ContainerResourceLocator

Servlet resource locator.

Author:

tfennelly

Constructor Summary

ServletResourceLocator(javax.servlet.ServletConfig config, ExternalResourceLocator externalResourceLocator)
Public constructor.

Method Summary

URI	getBaseURI() Get the base URI for the locator instance.
InputStream	getResource(String uri) Get a resource stream through the Servlet container.
InputStream	getResource(String configName, String defaultUri) Get a resource stream through the Servlet container.

Methods inherited from class java.lang.Object

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

Constructor Detail

ServletResourceLocator

public ServletResourceLocator(javax.servlet.ServletConfig config,
                              ExternalResourceLocator externalResourceLocator)

Public constructor.

Parameters:

config - The ServletConfig instance.

externalResourceLocator - Resource locator for resources outside the Servlet context.

Method Detail

getResource

public InputStream getResource(String configName,
                               String defaultUri)
                        throws IllegalArgumentException,
                               IOException

Get a resource stream through the Servlet container.

If a Servlet configuration (see ServletParamUtils.getParameterValue(String, ServletConfig)) exists for "configName" the method uses use the config value, otherwise it use the "defaultUri" value provided. Calls getResource(String) to get the resource stream.

Specified by:

getResource in interface ContainerResourceLocator

Parameters:

configName - The container configuration entry name whose value specifies the location of the resource.

defaultUri - The default location for the resource.

Returns:

The InputStream associated with resource.

Throws:

IllegalArgumentException - Illegal argument. Check the cause exception for more information.

IOException - Unable to get the resource stream.

getResource

public InputStream getResource(String uri)
                        throws IllegalArgumentException,
                               IOException

Get a resource stream through the Servlet container.

Loads the resource through the first successfull call of:

• ServletContext.getResourceAsStream(java.lang.String)
• ExternalResourceLocator.getResource(String)

Specified by:

getResource in interface ExternalResourceLocator

Parameters:

uri - The location of the resource to be located.

Returns:

The InputStream associated with the org.milyn.resource.

Throws:

IllegalArgumentException - Illegal argument. Check the cause exception for more information.

IOException - Unable to get the org.milyn.resource stream.

getBaseURI

public URI getBaseURI()

Description copied from interface: ContainerResourceLocator

Get the base URI for the locator instance.

Specified by:

getBaseURI in interface ContainerResourceLocator

Returns:

The base URI for the locator instance.