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
015package org.apache.tapestry.asset;
016
017import java.util.Locale;
018
019import org.apache.hivemind.ApplicationRuntimeException;
020import org.apache.hivemind.ClassResolver;
021import org.apache.hivemind.Location;
022import org.apache.hivemind.Resource;
023import org.apache.hivemind.util.ClasspathResource;
024import org.apache.tapestry.IAsset;
025import org.apache.tapestry.engine.IEngineService;
026import 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 */
035public 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}