01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * The Original Software is NetBeans. The Initial Developer of the Original
27: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
28: * Microsystems, Inc. All Rights Reserved.
29: *
30: * If you wish your version of this file to be governed by only the CDDL
31: * or only the GPL Version 2, indicate your decision by adding
32: * "[Contributor] elects to include this software in this distribution
33: * under the [CDDL or GPL Version 2] license." If you do not indicate a
34: * single choice of license, a recipient has the option to distribute
35: * your version of this file under either the CDDL, the GPL Version 2 or
36: * to extend the choice of license to its licensees as provided above.
37: * However, if you add GPL Version 2 code and therefore, elected the GPL
38: * Version 2 license, then the option applies only if the new code is
39: * made subject to such option by the copyright holder.
40: */
41: package com.sun.rave.web.ui.util;
42:
43: import java.beans.Beans;
44: import javax.faces.context.ExternalContext;
45: import javax.faces.context.FacesContext;
46: import javax.servlet.ServletContext;
47:
48: //import javax.portlet.PortletContext;
49:
50: /**
51: * Strategies for finding the current ClassLoader such as
52: * <code>Thread.currentThread().getContextClassLoader()</code>
53: * do not work during design time, where the notion of the
54: * classpath is more constrained. Please make sure you use
55: * this utility when you need to get hold of the current loader.
56: */
57: public class ClassLoaderFinder {
58:
59: /**
60: * <p>Return the best class loader to use for loading resources.
61: * This is normally the thread context class loader but can
62: * overridden using {@link #setCustomClassLoader}. At design-time, if
63: * no custom class loader has been set, an attempt will be made to
64: * load the class loader stored in the servlet or portlet context
65: * attribute <code>com.sun.rave.project.classloader</code>
66: * </p>
67: * @param fallbackClass If there is no context class loader, fall
68: * back to using the class loader for the given object
69: * @return A ClassLoader to use for loading resources
70: */
71: public static ClassLoader getCurrentLoader(Object fallbackClass) {
72: ClassLoader loader = Thread.currentThread()
73: .getContextClassLoader();
74: if (loader == null) {
75: loader = fallbackClass.getClass().getClassLoader();
76: }
77: return loader;
78: }
79: }
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