-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
chore(java): dropped shadow, NativeUtils as class file
- Loading branch information
Showing
7 changed files
with
171 additions
and
44 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| /* | ||
| * Class NativeUtils is published under the The MIT License: | ||
| * | ||
| * Copyright (c) 2012 Adam Heinrich <[email protected]> | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
| package mp.code; | ||
|
|
||
| import java.io.*; | ||
| import java.nio.file.FileSystemNotFoundException; | ||
| import java.nio.file.FileSystems; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.ProviderNotFoundException; | ||
| import java.nio.file.StandardCopyOption; | ||
| import java.util.Objects; | ||
|
|
||
| /** | ||
| * A simple library class which helps with loading dynamic libraries stored in the | ||
| * JAR archive. These libraries usually contain implementation of some methods in | ||
| * native code (using JNI - Java Native Interface). | ||
| * @see <a href="http://adamheinrich.com/blog/2012/how-to-load-native-jni-library-from-jar">http://adamheinrich.com/blog/2012/how-to-load-native-jni-library-from-jar</a> | ||
| * @see <a href="https://github.com/adamheinrich/native-utils">https://github.com/adamheinrich/native-utils</a> | ||
| */ | ||
| class NativeUtils { | ||
|
|
||
| /** | ||
| * The minimum length a prefix for a file has to have according to {@link File#createTempFile(String, String)}}. | ||
| */ | ||
| private static final int MIN_PREFIX_LENGTH = 3; | ||
|
|
||
| /** | ||
| * Prefix of the temporary folder where the native is stored. | ||
| */ | ||
| public static final String NATIVE_FOLDER_PATH_PREFIX = "nativeutils"; | ||
|
|
||
| /** | ||
| * Temporary directory which will contain the DLLs. | ||
| */ | ||
| private static File temporaryDir; | ||
|
|
||
| /** | ||
| * 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 path The path of file 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 {@link File#createTempFile(java.lang.String, java.lang.String)}). | ||
| * @throws FileNotFoundException If the file could not be found inside the JAR. | ||
| */ | ||
| @SuppressWarnings("ResultOfMethodCallIgnored") | ||
| private static void loadLibraryFromJar(String path) throws IOException { | ||
| if(null == path || !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; | ||
|
|
||
| // Check if the filename is okay | ||
| if(filename == null || filename.length() < MIN_PREFIX_LENGTH) { | ||
| throw new IllegalArgumentException("The filename has to be at least 3 characters long."); | ||
| } | ||
|
|
||
| // Prepare temporary file | ||
| if(temporaryDir == null) { | ||
| temporaryDir = createTempDirectory(); | ||
| temporaryDir.deleteOnExit(); | ||
| } | ||
|
|
||
| File temp = new File(temporaryDir, filename); | ||
|
|
||
| try(InputStream is = NativeUtils.class.getResourceAsStream(path)) { | ||
| Files.copy(Objects.requireNonNull(is), temp.toPath(), StandardCopyOption.REPLACE_EXISTING); | ||
| } catch (IOException e) { | ||
| temp.delete(); | ||
| throw e; | ||
| } catch (NullPointerException e) { | ||
| temp.delete(); | ||
| throw new FileNotFoundException("File " + path + " was not found inside JAR."); | ||
| } | ||
|
|
||
| try { | ||
| System.load(temp.getAbsolutePath()); | ||
| } finally { | ||
| if(isPosixCompliant()) { | ||
| // Assume POSIX compliant file system, can be deleted after loading | ||
| temp.delete(); | ||
| } else { | ||
| // Assume non-POSIX, and don't delete until last file descriptor closed | ||
| temp.deleteOnExit(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private static boolean isPosixCompliant() { | ||
| try { | ||
| return FileSystems.getDefault() | ||
| .supportedFileAttributeViews() | ||
| .contains("posix"); | ||
| } catch (FileSystemNotFoundException | ProviderNotFoundException | SecurityException e) { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| private static File createTempDirectory() throws IOException { | ||
| String tempDir = System.getProperty("java.io.tmpdir"); | ||
| File generatedDir = new File(tempDir, NativeUtils.NATIVE_FOLDER_PATH_PREFIX + System.nanoTime()); | ||
|
|
||
| if(!generatedDir.mkdir()) | ||
| throw new IOException("Failed to create temp directory " + generatedDir.getName()); | ||
|
|
||
| return generatedDir; | ||
| } | ||
|
|
||
| private static boolean loaded = false; | ||
| static synchronized void loadLibraryIfNeeded() { | ||
| if(loaded) return; | ||
| try { | ||
| String os = System.getProperty("os.name").toLowerCase(); | ||
|
|
||
| String filename; | ||
| if(os.startsWith("windows")) { | ||
| filename = "/natives/codemp.dll"; | ||
| } else if(os.startsWith("mac")) { | ||
| filename = "/natives/libcodemp.dylib";; | ||
| } else filename = "/natives/libcodemp.so"; | ||
| loadLibraryFromJar(filename); | ||
|
|
||
| loaded = true; | ||
| } catch(IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters