    001    // Copyright 2006, 2007, 2008, 2009 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.tapestry5.internal.services;
    016
    017    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    018    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    019    import org.apache.tapestry5.ioc.util.Stack;
    020    import org.apache.tapestry5.services.Context;
    021
    022    import javax.servlet.ServletContext;
    023    import java.io.File;
    024    import java.net.MalformedURLException;
    025    import java.net.URL;
    026    import java.util.Collections;
    027    import java.util.List;
    028    import java.util.Set;
    029
    030    public class ContextImpl implements Context
    031    {
    032        private final ServletContext servletContext;
    033
    034        public ContextImpl(ServletContext servletContext)
    035        {
    036            this.servletContext = servletContext;
    037        }
    038
    039        public URL getResource(String path)
    040        {
    041            try
    042            {
    043                return servletContext.getResource(path);
    044            }
    045            catch (MalformedURLException ex)
    046            {
    047                throw new RuntimeException(ex);
    048            }
    049        }
    050
    051        public File getRealFile(String path)
    052        {
    053            String realPath = servletContext.getRealPath(path);
    054
    055            return realPath == null ? null : new File(realPath);
    056        }
    057
    058        public String getInitParameter(String name)
    059        {
    060            return servletContext.getInitParameter(name);
    061        }
    062
    063        @SuppressWarnings("unchecked")
    064        public List<String> getResourcePaths(String path)
    065        {
    066            List<String> result = CollectionFactory.newList();
    067            Stack<String> queue = CollectionFactory.newStack();
    068
    069            queue.push(path);
    070
    071            while (!queue.isEmpty())
    072            {
    073                String current = queue.pop();
    074
    075                Set<String> matches = servletContext.getResourcePaths(current);
    076
    077                // Tomcat 5.5.20 inside JBoss 4.0.2 has been observed to do this!
    078                // Perhaps other servers do as well.
    079
    080                if (matches == null) continue;
    081
    082                for (String match : matches)
    083                {
    084                    // Folders are queued up for further expansion.
    085
    086                    if (match.endsWith("/")) queue.push(match);
    087                    else result.add(match);
    088                }
    089            }
    090
    091            Collections.sort(result);
    092
    093            return result;
    094        }
    095
    096        public Object getAttribute(String name)
    097        {
    098            return servletContext.getAttribute(name);
    099        }
    100
    101        public List<String> getAttributeNames()
    102        {
    103            return InternalUtils.toList(servletContext.getAttributeNames());
    104        }
    105
    106        public String getMimeType(String file)
    107        {
    108            return servletContext.getMimeType(file);
    109        }
    110    }