001    // Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.asset;
016    
017    import java.util.Locale;
018    
019    import org.apache.hivemind.ApplicationRuntimeException;
020    import org.apache.hivemind.ClassResolver;
021    import org.apache.hivemind.Location;
022    import org.apache.hivemind.Resource;
023    import org.apache.hivemind.util.ClasspathResource;
024    import org.apache.tapestry.IAsset;
025    import org.apache.tapestry.engine.IEngineService;
026    import org.apache.tapestry.l10n.ResourceLocalizer;
027    
028    /**
029     * Creates instances of {@link org.apache.tapestry.asset.PrivateAsset}, which are the holders of
030     * classpath: resources.
031     * 
032     * @author Howard M. Lewis Ship
033     * @since 4.0
034     */
035    public class ClasspathAssetFactory implements AssetFactory
036    {
037        private ClassResolver _classResolver;
038    
039        private IEngineService _assetService;
040    
041        private ResourceLocalizer _localizer;
042    
043        public IAsset createAsset(Resource baseResource, String path, Locale locale, Location location)
044        {
045            Resource asset = baseResource.getRelativeResource(path);
046            Resource localized = _localizer.findLocalization(asset, locale);
047    
048            if (localized == null)
049                throw new ApplicationRuntimeException(AssetMessages.missingAsset(path, baseResource),
050                        location, null);
051    
052            return createAsset(localized, location);
053        }
054    
055        public IAsset createAbsoluteAsset(String path, Locale locale, Location location)
056        {
057            Resource base = new ClasspathResource(_classResolver, path);
058            Resource localized = _localizer.findLocalization(base, locale);
059    
060            if (localized == null)
061                throw new ApplicationRuntimeException(AssetMessages.missingClasspathResource(path),
062                        location, null);
063    
064            return createAsset(localized, location);
065        }
066    
067        public IAsset createAsset(Resource resource, Location location)
068        {
069            ClasspathResource cr = (ClasspathResource) resource;
070    
071            return new PrivateAsset(cr, _assetService, location);
072        }
073    
074        public void setAssetService(IEngineService assetService)
075        {
076            _assetService = assetService;
077        }
078    
079        public void setClassResolver(ClassResolver classResolver)
080        {
081            _classResolver = classResolver;
082        }
083    
084        public void setLocalizer(ResourceLocalizer localizer)
085        {
086            _localizer = localizer;
087        }
088    }