a9b42eca27
2009-05-04 13:51:10 +0200 cmc r271450 : #i101533# latest sw warnings 2009-05-04 00:02:46 +0200 cmc r271436 : #i101517# silence new warnings 2009-05-03 23:13:53 +0200 cmc r271435 : #i101305# add that one back in 2009-05-02 16:30:42 +0200 cmc r271431 : #i101493# get it to build, and remove some warnings 2009-05-02 16:12:37 +0200 cmc r271430 : CWS-TOOLING: rebase CWS cmcfixes58 to trunk@271427 (milestone: DEV300:m47) 2009-04-23 13:19:33 +0200 cmc r271163 : #i101305# remove annoying import foo is unused warnings 2009-04-21 17:10:34 +0200 cmc r271048 : #i101246# remove AVMEDIA_MANAGER_SERVICE_NAME defines again 2009-04-21 17:07:41 +0200 cmc r271047 : #i86323# remove xml2cmp unused methods
122 lines
4.8 KiB
Java
122 lines
4.8 KiB
Java
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: NativeLibraryLoader.java,v $
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* $Revision: 1.10 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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package com.sun.star.lib.util;
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import java.io.File;
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import java.net.URL;
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import java.net.URLClassLoader;
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/** Helper functions to locate and load native files.
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The methods in this class are designed to find the requested resources in as
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many cases as possible. They search various places, roughly from most
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specific to most general. This works well if a component is known to bring
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with it a certain resource, and that resource has to be found. However, it
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might not work very well in cases where you want to check whether a
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component brings with it a certain resource or not: a similarly named
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resource from another component might be found by the eager search
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algorithm.
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*/
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public final class NativeLibraryLoader {
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/** Load a system library, using a given class loader to locate the library.
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This is similar to System.loadLibrary.
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@param loader a class loader; may be null
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@param libname the library name; how this name is mapped to a system
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library name is system dependent
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*/
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public static void loadLibrary(ClassLoader loader, String libname) {
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File path = getResource(loader, System.mapLibraryName(libname));
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if (path == null) {
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// If the library cannot be found as a class loader resource, try
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// the global System.loadLibrary as a last resort:
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System.loadLibrary(libname);
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} else {
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System.load(path.getAbsolutePath());
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}
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}
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/** Locate a system resource, using a given class loader.
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This is similar to ClassLoader.getResource, but only works for local
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resources (local files), and adds additional functionality for
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URLClassLoaders.
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@param loader a class loader; may be null
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@param name a resource name (that is, the name of a file)
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@return a File locating the resource, or null if the resource was not
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found
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*/
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public static File getResource(ClassLoader loader, String name) {
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if (loader != null) {
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File path = UrlToFileMapper.mapUrlToFile(loader.getResource(name));
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if (path != null) {
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return path;
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}
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}
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// URLClassLoaders work on lists of URLs, which are typically URLs
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// locating JAR files (scheme://auth/dir1/dir2/some.jar). The following
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// code looks for resource name beside the JAR file
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// (scheme://auth/dir1/dir2/name) and one directory up
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// (scheme://auth/dir1/name). The second step is important in a typical
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// OOo installation, where the JAR files are in the program/classes
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// directory while the shared libraries are in the program directory.
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if (loader instanceof URLClassLoader) {
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URL[] urls = ((URLClassLoader) loader).getURLs();
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for (int i = 0; i < urls.length; ++i) {
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File path = UrlToFileMapper.mapUrlToFile(urls[i]);
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if (path != null) {
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File dir = path.isDirectory() ? path : path.getParentFile();
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if (dir != null) {
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path = new File(dir, name);
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if (path.exists()) {
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return path;
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}
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dir = dir.getParentFile();
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if (dir != null) {
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path = new File(dir, name);
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if (path.exists()) {
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return path;
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}
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}
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}
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}
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}
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}
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return null;
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}
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private NativeLibraryLoader() {} // do not instantiate
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}
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