src/net/fortuna/ical4j/util/ResourceLoader.java@e0e108e77052 (annotated)
src/net/fortuna/ical4j/util/ResourceLoader.java
Tue, 10 Feb 2015 21:32:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 10 Feb 2015 21:32:00 +0100
- changeset 5
- e0e108e77052
- parent 0
- fb9019fb1bf7
- permissions
- -rw-r--r--
Complete porting of ical4j to post getContextClassLoader() Android era,
correcting critical flaws reported by users on the upstream bugtracker
including https://github.com/gggard/AndroidCaldavSyncAdapater/issues/224/
| michael@0 | 1 | /** |
| michael@0 | 2 | * Copyright (c) 2012, Ben Fortuna |
| michael@0 | 3 | * All rights reserved. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 6 | * modification, are permitted provided that the following conditions |
| michael@0 | 7 | * are met: |
| michael@0 | 8 | * |
| michael@0 | 9 | * o Redistributions of source code must retain the above copyright |
| michael@0 | 10 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 11 | * |
| michael@0 | 12 | * o Redistributions in binary form must reproduce the above copyright |
| michael@0 | 13 | * notice, this list of conditions and the following disclaimer in the |
| michael@0 | 14 | * documentation and/or other materials provided with the distribution. |
| michael@0 | 15 | * |
| michael@0 | 16 | * o Neither the name of Ben Fortuna nor the names of any other contributors |
| michael@0 | 17 | * may be used to endorse or promote products derived from this software |
| michael@0 | 18 | * without specific prior written permission. |
| michael@0 | 19 | * |
| michael@0 | 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| michael@0 | 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| michael@0 | 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| michael@0 | 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| michael@0 | 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| michael@0 | 27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| michael@0 | 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| michael@0 | 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| michael@0 | 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 31 | */ |
| michael@0 | 32 | package net.fortuna.ical4j.util; |
| michael@0 | 33 | |
| michael@0 | 34 | import java.io.InputStream; |
| michael@0 | 35 | import java.net.URL; |
| michael@0 | 36 | |
| michael@0 | 37 | import org.apache.commons.logging.Log; |
| michael@0 | 38 | import org.apache.commons.logging.LogFactory; |
| michael@0 | 39 | |
| michael@0 | 40 | /** |
| michael@0 | 41 | * @author fortuna |
| michael@0 | 42 | * |
| michael@0 | 43 | */ |
| michael@0 | 44 | public class ResourceLoader { |
| michael@0 | 45 | |
| michael@0 | 46 | private static final Log LOG = LogFactory.getLog(ResourceLoader.class); |
| michael@0 | 47 | |
| michael@0 | 48 | /** |
| michael@0 | 49 | * Load a resource via the thread context classloader. If security permissions don't allow |
| michael@0 | 50 | * this fallback to loading via current classloader. |
| michael@0 | 51 | * @param name a resource name |
| michael@0 | 52 | * @return a {@link URL} or null if resource is not found |
| michael@0 | 53 | */ |
| michael@0 | 54 | public static URL getResource(String name) { |
| michael@0 | 55 | URL resource = null; |
| michael@0 | 56 | try { |
| michael@5 | 57 | // Hack to bootstrap a multithreaded class loader context |
| michael@5 | 58 | if (Thread.currentThread().getContextClassLoader() == null) |
| michael@5 | 59 | Thread.currentThread().setContextClassLoader(ResourceLoader.class.getClassLoader()); |
| michael@0 | 60 | resource = Thread.currentThread().getContextClassLoader().getResource(name); |
| michael@5 | 61 | |
| michael@5 | 62 | if (resource == null) // Flawed build path for assets, try again |
| michael@5 | 63 | resource = Thread.currentThread().getContextClassLoader().getResource("/" + name); |
| michael@0 | 64 | } |
| michael@0 | 65 | catch (SecurityException e) { |
| michael@0 | 66 | LOG.info("Unable to access context classloader, using default. " + e.getMessage()); |
| michael@0 | 67 | } |
| michael@5 | 68 | catch (Exception e) { |
| michael@5 | 69 | LOG.info("General context classloader error, using default. " + e.getMessage()); |
| michael@5 | 70 | } |
| michael@0 | 71 | if (resource == null) { |
| michael@0 | 72 | resource = ResourceLoader.class.getResource("/" + name); |
| michael@0 | 73 | } |
| michael@0 | 74 | return resource; |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | /** |
| michael@0 | 78 | * Load a resource via the thread context classloader. If security permissions don't allow |
| michael@0 | 79 | * this fallback to loading via current classloader. |
| michael@0 | 80 | * @param name a resource name |
| michael@0 | 81 | * @return an {@link InputStream} or null if resource is not found |
| michael@0 | 82 | */ |
| michael@0 | 83 | public static InputStream getResourceAsStream(String name) { |
| michael@0 | 84 | InputStream stream = null; |
| michael@0 | 85 | try { |
| michael@5 | 86 | // Hack to bootstrap a multithreaded class loader context |
| michael@5 | 87 | if (Thread.currentThread().getContextClassLoader() == null) |
| michael@5 | 88 | Thread.currentThread().setContextClassLoader(ResourceLoader.class.getClassLoader()); |
| michael@0 | 89 | stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(name); |
| michael@5 | 90 | if (stream == null) |
| michael@5 | 91 | stream = Thread.currentThread().getContextClassLoader().getResourceAsStream("/" + name); |
| michael@0 | 92 | } |
| michael@0 | 93 | catch (SecurityException e) { |
| michael@0 | 94 | LOG.info("Unable to access context classloader, using default. " + e.getMessage()); |
| michael@0 | 95 | } |
| michael@5 | 96 | catch (Exception e) { |
| michael@5 | 97 | LOG.info("General context classloader error, using default. " + e.getMessage()); |
| michael@5 | 98 | } |
| michael@0 | 99 | if (stream == null) { |
| michael@0 | 100 | stream = ResourceLoader.class.getResourceAsStream("/" + name); |
| michael@0 | 101 | } |
| michael@0 | 102 | return stream; |
| michael@0 | 103 | } |
| michael@0 | 104 | } |
