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
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
018import org.apache.tapestry5.ioc.internal.util.InternalUtils;
019import org.apache.tapestry5.ioc.util.Stack;
020import org.apache.tapestry5.services.Context;
021
022import javax.servlet.ServletContext;
023import java.io.File;
024import java.net.MalformedURLException;
025import java.net.URL;
026import java.util.Collections;
027import java.util.List;
028import java.util.Set;
029
030public 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}