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Posted to dev@velocity.apache.org by dl...@apache.org on 2002/02/12 02:18:48 UTC
cvs commit: jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader LoaderAdapter.java
dlr 02/02/11 17:18:48
Added: src/java/org/apache/velocity/runtime/resource/loader
LoaderAdapter.java
Log:
A wrapper for a ResourceLoader, useful when you want to layer
additional functionality over the top of an existing loader.
Revision Changes Path
1.1 jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader/LoaderAdapter.java
Index: LoaderAdapter.java
===================================================================
package org.apache.velocity.runtime.resource.loader;
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import org.apache.commons.collections.ExtendedProperties;
import org.apache.velocity.runtime.resource.Resource;
/**
* A wrapper for a <code>ResourceLoader</code>, useful when you want
* to layer additional functionality over the top of an existing
* loader.
*
* @author <a href="geirm@apache.org">Geir Magnusson Jr.</a>
* @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
*/
public abstract class LoaderAdapter
extends ResourceLoader
{
/**
* Resource loader we are going to wrap.
*/
protected ResourceLoader resourceLoader = null;
/**
* Intializes the loader which this class wraps based on the
* <code>loader</code> configuration parameter for the applicable
* <code>ResourceLoader</code>.
*/
protected void initLoader(ExtendedProperties configuration)
{
// We must have a resource loader to wrap.
String loaderClass = configuration.getString("loader");
try
{
ExtendedProperties loaderConfiguration =
configuration.subset("loader");
resourceLoader = ResourceLoaderFactory.getLoader(rsvc, loaderClass);
resourceLoader.commonInit(rsvc, loaderConfiguration);
resourceLoader.init(loaderConfiguration);
rsvc.info("PathMapAdapter : using loader : " + loaderClass);
}
catch (Exception e)
{
rsvc.error("PathMapAdapter : problem instantiating loader : " + e);
}
}
/**
* @see org.apache.velocity.runtime.resource.loader.ResourceLoader#isSourceModified(Resource)
*/
public boolean isSourceModified(Resource resource)
{
return resourceLoader.isSourceModified(resource);
}
/**
* @see org.apache.velocity.runtime.resource.loader.ResourceLoader#getLastModified(Resource)
*/
public long getLastModified(Resource resource)
{
return resourceLoader.getLastModified(resource);
}
}
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Re: cvs commit: jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader LoaderAdapter.java
Posted by Daniel Rall <dl...@finemaltcoding.com>.
Jon Scott Stevens <jo...@latchkey.com> writes:
> on 2/11/02 5:18 PM, "dlr@apache.org" <dl...@apache.org> wrote:
>
>> rsvc.info("PathMapAdapter : using loader : " + loaderClass);
>> }
>> catch (Exception e)
>> {
>> rsvc.error("PathMapAdapter : problem instantiating loader : " +
>> e);
>>
>
> PathMapAdapter?
Fixed, thanks Jon.
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Re: cvs commit:
jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader
LoaderAdapter.java
Posted by Jon Scott Stevens <jo...@latchkey.com>.
on 2/11/02 5:18 PM, "dlr@apache.org" <dl...@apache.org> wrote:
> rsvc.info("PathMapAdapter : using loader : " + loaderClass);
> }
> catch (Exception e)
> {
> rsvc.error("PathMapAdapter : problem instantiating loader : " +
> e);
>
PathMapAdapter?
-jon
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Re: cvs commit: jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader LoaderAdapter.java
Posted by Daniel Rall <dl...@finemaltcoding.com>.
Jon Scott Stevens <jo...@latchkey.com> writes:
> on 2/11/02 5:18 PM, "dlr@apache.org" <dl...@apache.org> wrote:
>
>> * @author <a href="geirm@apache.org">Geir Magnusson Jr.</a>
>
> Missing mailto:
Thanks, I'd just got it. :-)
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Re: cvs commit:
jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader
LoaderAdapter.java
Posted by Jon Scott Stevens <jo...@latchkey.com>.
on 2/11/02 5:18 PM, "dlr@apache.org" <dl...@apache.org> wrote:
> * @author <a href="geirm@apache.org">Geir Magnusson Jr.</a>
Missing mailto:
-jon
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Re: cvs commit:
jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader
LoaderAdapter.java
Posted by "Geir Magnusson Jr." <ge...@optonline.net>.
On 2/12/02 9:45 AM, "Jason van Zyl" <jv...@zenplex.com> wrote:
> On 2/11/02 8:18 PM, "dlr@apache.org" <dl...@apache.org> wrote:
>
>> dlr 02/02/11 17:18:48
>>
>> Added: src/java/org/apache/velocity/runtime/resource/loader
>> LoaderAdapter.java
>> Log:
>> A wrapper for a ResourceLoader, useful when you want to layer
>> additional functionality over the top of an existing loader.
>>
>
> I haven't looked to deeply into the class but if you are providing
> additional functionality transparently to existing resource loaders then you
> have a decorator not an adapter. From your comment, that's what you appear
> to have. An adapter converts one interface to another. Just wanted to
> clarify as the use of 'Adapter' already has some weirdo uses in the velocity
> source base.
Thx.
It was meant to be a starting point for discussion :)
--
Geir Magnusson Jr. geirm@optonline.net
System and Software Consulting
My inner cowboy needs to yodel.
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Re: cvs commit:
jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader
LoaderAdapter.java
Posted by Jason van Zyl <jv...@zenplex.com>.
On 2/11/02 8:18 PM, "dlr@apache.org" <dl...@apache.org> wrote:
> dlr 02/02/11 17:18:48
>
> Added: src/java/org/apache/velocity/runtime/resource/loader
> LoaderAdapter.java
> Log:
> A wrapper for a ResourceLoader, useful when you want to layer
> additional functionality over the top of an existing loader.
>
I haven't looked to deeply into the class but if you are providing
additional functionality transparently to existing resource loaders then you
have a decorator not an adapter. From your comment, that's what you appear
to have. An adapter converts one interface to another. Just wanted to
clarify as the use of 'Adapter' already has some weirdo uses in the velocity
source base.
--
jvz.
Jason van Zyl
http://tambora.zenplex.org
http://jakarta.apache.org/turbine
http://jakarta.apache.org/velocity
http://jakarta.apache.org/alexandria
http://jakarta.apache.org/commons
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