    001// Copyright 2014 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.
    014package org.apache.tapestry5.internal.services;
    015
    016import java.net.MalformedURLException;
    017import java.net.URL;
    018import java.util.Map;
    019
    020import org.apache.tapestry5.Asset;
    021import org.apache.tapestry5.commons.Resource;
    022import org.apache.tapestry5.commons.util.CollectionFactory;
    023import org.apache.tapestry5.internal.AssetConstants;
    024import org.apache.tapestry5.services.AssetFactory;
    025
    026public class ExternalUrlAssetFactory implements AssetFactory {
    027
    028    final private String protocol;
    029
    030    final private UrlResource rootResource;
    031
    032    final private Map<URL, Asset> cache = CollectionFactory.newMap();
    033
    034    public ExternalUrlAssetFactory(String protocol)
    035    {
    036        super();
    037        this.protocol = protocol;
    038//        try
    039//        {
    040            if (protocol.equals(AssetConstants.PROTOCOL_RELATIVE)) {
    041                protocol = "http";
    042            }
    043            this.rootResource = new UrlResource();
    044//        }
    045//        catch (MalformedURLException e)
    046//        {
    047//            throw new RuntimeException(e);
    048//        }
    049    }
    050
    051    @Override
    052    public Resource getRootResource()
    053    {
    054        return rootResource;
    055    }
    056
    057    @Override
    058    public Asset createAsset(Resource resource)
    059    {
    060        final URL url = resource.toURL();
    061        Asset asset = cache.get(url);
    062        if (asset == null)
    063        {
    064            asset = new UrlAsset(url.toExternalForm(), resource);
    065            cache.put(url, asset);
    066        }
    067        return asset;
    068    }
    069
    070}