src/net/fortuna/ical4j/util/ResourceLoader.java

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1 /**
2 * Copyright (c) 2012, Ben Fortuna
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * o Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * o Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * o Neither the name of Ben Fortuna nor the names of any other contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32 package net.fortuna.ical4j.util;
33
34 import java.io.InputStream;
35 import java.net.URL;
36
37 import org.apache.commons.logging.Log;
38 import org.apache.commons.logging.LogFactory;
39
40 /**
41 * @author fortuna
42 *
43 */
44 public class ResourceLoader {
45
46 private static final Log LOG = LogFactory.getLog(ResourceLoader.class);
47
48 /**
49 * Load a resource via the thread context classloader. If security permissions don't allow
50 * this fallback to loading via current classloader.
51 * @param name a resource name
52 * @return a {@link URL} or null if resource is not found
53 */
54 public static URL getResource(String name) {
55 URL resource = null;
56 try {
57 resource = Thread.currentThread().getContextClassLoader().getResource(name);
58 }
59 catch (SecurityException e) {
60 LOG.info("Unable to access context classloader, using default. " + e.getMessage());
61 }
62 if (resource == null) {
63 resource = ResourceLoader.class.getResource("/" + name);
64 }
65 return resource;
66 }
67
68 /**
69 * Load a resource via the thread context classloader. If security permissions don't allow
70 * this fallback to loading via current classloader.
71 * @param name a resource name
72 * @return an {@link InputStream} or null if resource is not found
73 */
74 public static InputStream getResourceAsStream(String name) {
75 InputStream stream = null;
76 try {
77 stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(name);
78 }
79 catch (SecurityException e) {
80 LOG.info("Unable to access context classloader, using default. " + e.getMessage());
81 }
82 if (stream == null) {
83 stream = ResourceLoader.class.getResourceAsStream("/" + name);
84 }
85 return stream;
86 }
87 }

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