1 files changed, 132 insertions, 0 deletions
diff --git a/ridljar/com/sun/star/lib/util/NativeLibraryLoader.java b/ridljar/com/sun/star/lib/util/NativeLibraryLoader.java
new file mode 100644
index 000000000..eb5c6af34
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+++ b/ridljar/com/sun/star/lib/util/NativeLibraryLoader.java
@@ -0,0 +1,132 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+package com.sun.star.lib.util;
+
+import java.io.File;
+import java.net.URL;
+import java.net.URLClassLoader;
+
+/**
+ * Helper functions to locate and load native files.
+ *
+ * <p>The methods in this class are designed to find the requested resources in
+ * as many cases as possible.  They search various places, roughly from most
+ * specific to most general.  This works well if a component is known to bring
+ * with it a certain resource, and that resource has to be found.  However, it
+ * might not work very well in cases where you want to check whether a
+ * component brings with it a certain resource or not: a similarly named
+ * resource from another component might be found by the eager search
+ * algorithm.</p>
+ */
+public final class NativeLibraryLoader {
+    /**
+     * Load a system library, using a given class loader to locate the library.
+     *
+     * <p>This is similar to <code>System.loadLibrary</code>.</p>
+     *
+     * @param loader a class loader; may be null.
+     * @param libname the library name; how this name is mapped to a system
+     * library name is system dependent.
+     */
+    public static void loadLibrary(ClassLoader loader, String libname) {
+        String sysname = System.mapLibraryName(libname);
+        // At least Oracle's 1.7.0_51 now maps to .dylib rather than .jnilib:
+        if (System.getProperty("os.name").startsWith("Mac")
+            && sysname.endsWith(".dylib"))
+        {
+            sysname
+                = sysname.substring(0, sysname.length() - "dylib".length())
+                + "jnilib";
+        }
+        File path = getResource(loader, sysname);
+        if (path == null) {
+            // If the library cannot be found as a class loader resource, try
+            // the global System.loadLibrary as a last resort:
+            System.loadLibrary(libname);
+        } else {
+            System.load(path.getAbsolutePath());
+        }
+    }
+
+    /**
+     * Locate a system resource, using a given class loader.
+     *
+     * <p>This is similar to <code>ClassLoader.getResource</code>, but only works
+     * for local resources (local files), and adds additional functionality for
+     * <code>URLClassLoaders</code>.</p>
+     *
+     * @param loader a class loader; may be null.
+     * @param name a resource name (that is, the name of a file).
+     * @return a File locating the resource, or null if the resource was not
+     * found.
+     */
+    public static File getResource(ClassLoader loader, String name) {
+        if (loader != null) {
+            File path = UrlToFileMapper.mapUrlToFile(loader.getResource(name));
+            if (path != null) {
+                return path;
+            }
+        }
+        // URLClassLoaders work on lists of URLs, which are typically URLs
+        // locating JAR files (scheme://auth/dir1/dir2/some.jar).  The following
+        // code looks for resource name beside the JAR file
+        // (scheme://auth/dir1/dir2/name) and one directory up
+        // (scheme://auth/dir1/name).  The second step is important in a typical
+        // OOo installation, where the JAR files are in the program/classes
+        // directory while the shared libraries are in the program directory.
+        if (!(loader instanceof URLClassLoader)) {
+            return null;
+        }
+        URL[] urls = ((URLClassLoader) loader).getURLs();
+        for (int i = 0; i < urls.length; ++i) {
+            File path = UrlToFileMapper.mapUrlToFile(urls[i]);
+            if (path != null) {
+                File dir = path.isDirectory() ? path : path.getParentFile();
+                if (dir != null) {
+                    path = new File(dir, name);
+                    if (path.exists()) {
+                        return path;
+                    }
+                    dir = dir.getParentFile();
+                    if (dir != null) {
+                        path = new File(dir, name);
+                        if (path.exists()) {
+                            return path;
+                        }
+                        // On macOS, dir is now the Resources dir,
+                        // we want to look in Frameworks
+                        if (System.getProperty("os.name").startsWith("Mac")
+                            && dir.getName().equals("Resources")) {
+                            dir = dir.getParentFile();
+                            path = new File(dir, "Frameworks/" + name);
+                            if (path.exists()) {
+                                return path;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        return null;
+    }
+
+    private NativeLibraryLoader() {} // do not instantiate
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */