1//
2//  ========================================================================
3//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4//  ------------------------------------------------------------------------
5//  All rights reserved. This program and the accompanying materials
6//  are made available under the terms of the Eclipse Public License v1.0
7//  and Apache License v2.0 which accompanies this distribution.
8//
9//      The Eclipse Public License is available at
10//      http://www.eclipse.org/legal/epl-v10.html
11//
12//      The Apache License v2.0 is available at
13//      http://www.opensource.org/licenses/apache2.0.php
14//
15//  You may elect to redistribute this code under either of these licenses.
16//  ========================================================================
17//
18
19
20package org.eclipse.jetty.webapp;
21
22import java.util.List;
23
24import org.eclipse.jetty.util.resource.Resource;
25
26/**
27 * FragmentConfiguration
28 *
29 *
30 *
31 * Process web-fragments in jars
32 */
33public class FragmentConfiguration extends AbstractConfiguration
34{
35    public final static String FRAGMENT_RESOURCES="org.eclipse.jetty.webFragments";
36
37    @Override
38    public void preConfigure(WebAppContext context) throws Exception
39    {
40        if (!context.isConfigurationDiscovered())
41            return;
42
43        //find all web-fragment.xmls
44        findWebFragments(context, context.getMetaData());
45
46    }
47
48    @Override
49    public void configure(WebAppContext context) throws Exception
50    {
51        if (!context.isConfigurationDiscovered())
52            return;
53
54        //order the fragments
55        context.getMetaData().orderFragments();
56    }
57
58    @Override
59    public void postConfigure(WebAppContext context) throws Exception
60    {
61        context.setAttribute(FRAGMENT_RESOURCES, null);
62    }
63
64    /* ------------------------------------------------------------------------------- */
65    /**
66     * Look for any web-fragment.xml fragments in META-INF of jars in WEB-INF/lib
67     *
68     * @throws Exception
69     */
70    public void findWebFragments (final WebAppContext context, final MetaData metaData) throws Exception
71    {
72        @SuppressWarnings("unchecked")
73        List<Resource> frags = (List<Resource>)context.getAttribute(FRAGMENT_RESOURCES);
74        if (frags!=null)
75        {
76            for (Resource frag : frags)
77            {
78            	if (frag.isDirectory()) //tolerate the case where the library is a directory, not a jar. useful for OSGi for example
79            	{
80                    metaData.addFragment(frag, Resource.newResource(frag.getURL()+"/META-INF/web-fragment.xml"));
81            	}
82                else //the standard case: a jar most likely inside WEB-INF/lib
83                {
84                    metaData.addFragment(frag, Resource.newResource("jar:"+frag.getURL()+"!/META-INF/web-fragment.xml"));
85                }
86            }
87        }
88    }
89}
90