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comparison: src/net/fortuna/ical4j/util/ResourceLoader.java
src/net/fortuna/ical4j/util/ResourceLoader.java
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- ICAL4J_EMBED_1
- changeset 15
- cc93757aeca3
- parent 0
- fb9019fb1bf7
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| 1:c53be8a942e9 | -1:000000000000 |
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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 // Hack to bootstrap a multithreaded class loader context | |
| 58 if (Thread.currentThread().getContextClassLoader() == null) | |
| 59 Thread.currentThread().setContextClassLoader(ResourceLoader.class.getClassLoader()); | |
| 60 resource = Thread.currentThread().getContextClassLoader().getResource(name); | |
| 61 | |
| 62 if (resource == null) // Flawed build path for assets, try again | |
| 63 resource = Thread.currentThread().getContextClassLoader().getResource("/" + name); | |
| 64 } | |
| 65 catch (SecurityException e) { | |
| 66 LOG.info("Unable to access context classloader, using default. " + e.getMessage()); | |
| 67 } | |
| 68 catch (Exception e) { | |
| 69 LOG.info("General context classloader error, using default. " + e.getMessage()); | |
| 70 } | |
| 71 if (resource == null) { | |
| 72 resource = ResourceLoader.class.getResource("/" + name); | |
| 73 } | |
| 74 return resource; | |
| 75 } | |
| 76 | |
| 77 /** | |
| 78 * Load a resource via the thread context classloader. If security permissions don't allow | |
| 79 * this fallback to loading via current classloader. | |
| 80 * @param name a resource name | |
| 81 * @return an {@link InputStream} or null if resource is not found | |
| 82 */ | |
| 83 public static InputStream getResourceAsStream(String name) { | |
| 84 InputStream stream = null; | |
| 85 try { | |
| 86 // Hack to bootstrap a multithreaded class loader context | |
| 87 if (Thread.currentThread().getContextClassLoader() == null) | |
| 88 Thread.currentThread().setContextClassLoader(ResourceLoader.class.getClassLoader()); | |
| 89 stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(name); | |
| 90 if (stream == null) | |
| 91 stream = Thread.currentThread().getContextClassLoader().getResourceAsStream("/" + name); | |
| 92 } | |
| 93 catch (SecurityException e) { | |
| 94 LOG.info("Unable to access context classloader, using default. " + e.getMessage()); | |
| 95 } | |
| 96 catch (Exception e) { | |
| 97 LOG.info("General context classloader error, using default. " + e.getMessage()); | |
| 98 } | |
| 99 if (stream == null) { | |
| 100 stream = ResourceLoader.class.getResourceAsStream("/" + name); | |
| 101 } | |
| 102 return stream; | |
| 103 } | |
| 104 } |
