// Copyright 2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry.asset;
import java.util.Locale;
import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.Location;
import org.apache.hivemind.Resource;
import org.apache.tapestry.IAsset;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.l10n.ResourceLocalizer;
import org.apache.tapestry.web.WebContext;
import org.apache.tapestry.web.WebContextResource;
/**
* All "context:" prefixed asset paths are interpreted relative to the web context (the web
* application's root folder).
*
* @author Howard M. Lewis Ship
* @since 4.0
*/
public class ContextAssetFactory implements AssetFactory
{
private String _contextPath;
private AssetFactory _classpathAssetFactory;
private WebContext _webContext;
private ResourceLocalizer _localizer;
private IRequestCycle _requestCycle;
public void setWebContext(WebContext webContext)
{
_webContext = webContext;
}
public IAsset createAsset(Resource baseResource, String path, Locale locale, Location location)
{
// We always create a new asset relative to an existing resource; the type of resource
// will jive with the type of asset returned. Path may start with a leading slash, which
// yields an absolute, not relative, path to the resource.
Resource assetResource = baseResource.getRelativeResource(path);
// Here's the thing; In Tapestry 3.0 and earlier, you could specify
// library path like /org/apache/tapestry/contrib/Contrib.library. In the new scheme
// of things, that should be "classpath:/org/apache/tapestry/contrib/Contrib.library".
// But to keep a lot of things from breaking, we'll kludgely allow that here.
if (assetResource.getResourceURL() == null && path.startsWith("/"))
return _classpathAssetFactory.createAbsoluteAsset(path, locale, location);
Resource localized = _localizer.findLocalization(assetResource, locale);
if (localized == null)
throw new ApplicationRuntimeException(AssetMessages.missingAsset(path, baseResource),
location, null);
return createAsset(localized, location);
}
public IAsset createAbsoluteAsset(String path, Locale locale, Location location)
{
Resource base = new WebContextResource(_webContext, path);
Resource localized = _localizer.findLocalization(base, locale);
if (localized == null)
throw new ApplicationRuntimeException(AssetMessages.missingContextResource(path),
location, null);
return createAsset(localized, location);
}
public IAsset createAsset(Resource resource, Location location)
{
return new ContextAsset(_contextPath, resource, location, _requestCycle);
}
public void setContextPath(String contextPath)
{
_contextPath = contextPath;
}
public void setClasspathAssetFactory(AssetFactory classpathAssetFactory)
{
_classpathAssetFactory = classpathAssetFactory;
}
public void setLocalizer(ResourceLocalizer localizer)
{
_localizer = localizer;
}
public void setRequestCycle(IRequestCycle cycle)
{
_requestCycle = cycle;
}
}