webwork.view.velocity

Class WebAppLoader

java.lang.Object

org.apache.velocity.runtime.resource.loader.ResourceLoader

webwork.view.velocity.WebAppLoader

public class WebAppLoader
extends org.apache.velocity.runtime.resource.loader.ResourceLoader

Resource loader that uses the ServletContext of a webapp to load Velocity templates. (it's much easier to use with servlets than the standard FileResourceLoader, in particular the use of war files is transparent).

The default search path is '/' (relative to the webapp root), but you can change this behaviour by specifying one or more paths by mean of as many webapp.resource.loader.path properties as needed in the velocity.properties file.

All paths must be relative to the root of the webapp.

NOTE: Shamelessly stolen from velocity-tools sources. We include it because it's a lot more civilised that lugging in all of velo-tools just for a resource loader.

Version:

$Id: WebAppLoader.java,v 1.2 2003/11/16 04:54:53 fate Exp $

Author:

Geir Magnusson Jr., Nathan Bubna, Claude Brisson

Field Summary

Fields

Modifier and Type	Field and Description
protected String[]	paths The root paths for templates (relative to webapp's root).
protected javax.servlet.ServletContext	servletContext

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

className, isCachingOn, log, modificationCheckInterval, rsvc

Constructor Summary

Constructors

Constructor and Description
WebAppLoader()

Method Summary

Methods

Modifier and Type	Method and Description
long	getLastModified(org.apache.velocity.runtime.resource.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(org.apache.velocity.runtime.resource.Resource resource) Defaults to return false.

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

commonInit, getClassName, getModificationCheckInterval, isCachingOn, resourceExists, setCachingOn, setModificationCheckInterval

Methods inherited from class java.lang.Object

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

Field Detail

paths

protected String[] paths

The root paths for templates (relative to webapp's root).

servletContext

protected javax.servlet.ServletContext servletContext

Constructor Detail

WebAppLoader

public WebAppLoader()

Method Detail

init

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

This is abstract in the base class, so we need it.
NOTE: this expects that the ServletContext has already been placed in the runtime's application attributes under its full class name (i.e. "javax.servlet.ServletContext").

Specified by:

init in class org.apache.velocity.runtime.resource.loader.ResourceLoader

Parameters:

configuration - the ExtendedProperties associated with this resource loader.

getResourceStream

public InputStream getResourceStream(String name)
                              throws org.apache.velocity.exception.ResourceNotFoundException

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

Specified by:

getResourceStream in class org.apache.velocity.runtime.resource.loader.ResourceLoader

Parameters:

name - name of template to get

Returns:

InputStream containing the template

Throws:

org.apache.velocity.exception.ResourceNotFoundException - if template not found in classpath.

isSourceModified

public boolean isSourceModified(org.apache.velocity.runtime.resource.Resource resource)

Defaults to return false.

Specified by:

isSourceModified in class org.apache.velocity.runtime.resource.loader.ResourceLoader

getLastModified

public long getLastModified(org.apache.velocity.runtime.resource.Resource resource)

Defaults to return 0

Specified by:

getLastModified in class org.apache.velocity.runtime.resource.loader.ResourceLoader