org.apache.velocity.runtime.resource.loader
Class ClasspathResourceLoader

java.lang.Object
  org.apache.velocity.runtime.resource.loader.ResourceLoader
      org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader

public class ClasspathResourceLoader
extends ResourceLoader

ClasspathResourceLoader is a simple loader that will load templates from the classpath.

Will load templates from from multiple instances of and arbitrary combinations of :

• jar files
• zip files
• template directories (any directory containing templates)

This is a configuration-free loader, in that there are no parameters to be specified in the configuration properties, other than specifying this as the loader to use. For example the following is all that the loader needs to be functional :

resource.loader = class class.resource.loader.class = org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader

To use, put your template directories, jars and zip files into the classpath or other mechanisms that make resources accessable to the classloader.

This makes deployment trivial for web applications running in any Servlet 2.2 compliant servlet runner, such as Tomcat 3.2 and others.

For a Servlet Spec v2.2 servlet runner, just drop the jars of template files into the WEB-INF/lib directory of your webapp, and you won't have to worry about setting template paths or altering them with the root of the webapp before initializing.

I have also tried it with a WAR deployment, and that seemed to work just fine.

Version:

$Id: ClasspathResourceLoader.java 209482 2005-07-06 17:27:41Z wglass $

Author:

Aki Nieminen, Geir Magnusson Jr.

Field Summary

Fields inherited from class org.apache.velocity.runtime.resource.loader.ResourceLoader

className, isCachingOn, modificationCheckInterval, rsvc

Constructor Summary

ClasspathResourceLoader()

Method Summary

long	getLastModified(Resource resource) Defaults to return 0
InputStream	getResourceStream(String name) Get an InputStream so that the Runtime can build a template with it.
void	init(org.apache.commons.collections.ExtendedProperties configuration) This is abstract in the base class, so we need it
boolean	isSourceModified(Resource resource) Defaults to return false.

Methods inherited from class org.apache.velocity.runtime.resource.loader.ResourceLoader

commonInit, getClassName, getModificationCheckInterval, isCachingOn, setCachingOn, setModificationCheckInterval

Methods inherited from class java.lang.Object

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

Constructor Detail

ClasspathResourceLoader

public ClasspathResourceLoader()

Method Detail

init

public void init(org.apache.commons.collections.ExtendedProperties configuration)

This is abstract in the base class, so we need it

Specified by:

init in class ResourceLoader

getResourceStream

public InputStream getResourceStream(String name)
                              throws ResourceNotFoundException

Get an InputStream so that the Runtime can build a template with it.

Specified by:

getResourceStream in class ResourceLoader

Parameters:

name - name of template to get

Returns:

InputStream containing the template

Throws:

ResourceNotFoundException - if template not found in classpath.

isSourceModified

public boolean isSourceModified(Resource resource)

Defaults to return false.

Specified by:

isSourceModified in class ResourceLoader

getLastModified

public long getLastModified(Resource resource)

Defaults to return 0

Specified by:

getLastModified in class ResourceLoader