diff options
Diffstat (limited to 'zerotierone/java/src/com/zerotier/sdk/NativeUtils.java')
| -rw-r--r-- | zerotierone/java/src/com/zerotier/sdk/NativeUtils.java | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/zerotierone/java/src/com/zerotier/sdk/NativeUtils.java b/zerotierone/java/src/com/zerotier/sdk/NativeUtils.java deleted file mode 100644 index 07e1ef5..0000000 --- a/zerotierone/java/src/com/zerotier/sdk/NativeUtils.java +++ /dev/null @@ -1,93 +0,0 @@ -package com.zerotier.sdk; - -import java.io.File; -import java.io.FileNotFoundException; -import java.io.FileOutputStream; -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; - -/** - * Simple library class for working with JNI (Java Native Interface) - * - * @see http://adamheinrich.com/2012/how-to-load-native-jni-library-from-jar - * - * @author Adam Heirnich <[email protected]>, http://www.adamh.cz - */ -public class NativeUtils { - - /** - * Private constructor - this class will never be instanced - */ - private NativeUtils() { - } - - /** - * Loads library from current JAR archive - * - * The file from JAR is copied into system temporary directory and then loaded. The temporary file is deleted after exiting. - * Method uses String as filename because the pathname is "abstract", not system-dependent. - * - * @param filename The filename inside JAR as absolute path (beginning with '/'), e.g. /package/File.ext - * @throws IOException If temporary file creation or read/write operation fails - * @throws IllegalArgumentException If source file (param path) does not exist - * @throws IllegalArgumentException If the path is not absolute or if the filename is shorter than three characters (restriction of {@see File#createTempFile(java.lang.String, java.lang.String)}). - */ - public static void loadLibraryFromJar(String path) throws IOException { - - if (!path.startsWith("/")) { - throw new IllegalArgumentException("The path has to be absolute (start with '/')."); - } - - // Obtain filename from path - String[] parts = path.split("/"); - String filename = (parts.length > 1) ? parts[parts.length - 1] : null; - - // Split filename to prexif and suffix (extension) - String prefix = ""; - String suffix = null; - if (filename != null) { - parts = filename.split("\\.", 2); - prefix = parts[0]; - suffix = (parts.length > 1) ? "."+parts[parts.length - 1] : null; // Thanks, davs! :-) - } - - // Check if the filename is okay - if (filename == null || prefix.length() < 3) { - throw new IllegalArgumentException("The filename has to be at least 3 characters long."); - } - - // Prepare temporary file - File temp = File.createTempFile(prefix, suffix); - temp.deleteOnExit(); - - if (!temp.exists()) { - throw new FileNotFoundException("File " + temp.getAbsolutePath() + " does not exist."); - } - - // Prepare buffer for data copying - byte[] buffer = new byte[1024]; - int readBytes; - - // Open and check input stream - InputStream is = NativeUtils.class.getResourceAsStream(path); - if (is == null) { - throw new FileNotFoundException("File " + path + " was not found inside JAR."); - } - - // Open output stream and copy data between source file in JAR and the temporary file - OutputStream os = new FileOutputStream(temp); - try { - while ((readBytes = is.read(buffer)) != -1) { - os.write(buffer, 0, readBytes); - } - } finally { - // If read/write fails, close streams safely before throwing an exception - os.close(); - is.close(); - } - - // Finally, load the library - System.load(temp.getAbsolutePath()); - } -}
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