/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 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 acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation", "Tapestry"
* 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"
* or "Tapestry", nor may "Apache" or "Tapestry" appear in their
* name, without prior written permission of the Apache Software Foundation.
*
* 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 TAPESTRY CONTRIBUTOR COMMUNITY
* 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/>.
*
*/
package org.apache.tapestry.asset;
import java.io.InputStream;
import java.net.URL;
import org.apache.tapestry.ApplicationRuntimeException;
import org.apache.tapestry.ILocation;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.IResourceLocation;
import org.apache.tapestry.Tapestry;
import org.apache.tapestry.engine.IEngineService;
import org.apache.tapestry.engine.ILink;
import org.apache.tapestry.resource.ClasspathResourceLocation;
/**
* An implementation of {@link IAsset} for localizable assets within
* the JVM's classpath.
*
* <p>The localization code here is largely cut-and-paste from
* {@link ContextAsset}.
*
* @author Howard Ship
* @version $Id: PrivateAsset.java,v 1.4 2003/05/28 13:41:47 hlship Exp $
*
**/
public class PrivateAsset extends AbstractAsset
{
private AssetExternalizer _externalizer;
public PrivateAsset(ClasspathResourceLocation resourceLocation, ILocation location)
{
super(resourceLocation, location);
}
/**
* Gets the localized version of the resource. Build
* the URL for the resource. If possible, the application's
* {@link AssetExternalizer} is located, to copy the resource to
* a directory visible to the web server.
*
**/
public String buildURL(IRequestCycle cycle)
{
if (_externalizer == null)
_externalizer = AssetExternalizer.get(cycle);
String path = getResourceLocation().getPath();
String externalURL = _externalizer.getURL(path);
if (externalURL != null)
return externalURL;
// Otherwise, the service is responsible for dynamically retrieving the
// resource.
String[] parameters = new String[] { path };
IEngineService service = cycle.getEngine().getService(Tapestry.ASSET_SERVICE);
ILink link = service.getLink(cycle, null, parameters);
return link.getURL();
}
public InputStream getResourceAsStream(IRequestCycle cycle)
{
IResourceLocation location = getResourceLocation();
try
{
URL url = location.getResourceURL();
return url.openStream();
}
catch (Exception ex)
{
throw new ApplicationRuntimeException(
Tapestry.format("PrivateAsset.resource-missing", location),
ex);
}
}
}