dcurl/java/org/dltcollab/Dcurl.java at develop · DLTcollab/dcurl · GitHub

43 lines (37 loc) · 1.64 KB

package org.dltcollab;

import java.io.*;

import java.nio.file.Files;

import java.nio.file.StandardCopyOption;

public class Dcurl {

private static final String libraryName = "dcurl";

private static final String libraryPrefix = "lib";

private static final String librarySuffix = ".so";

private static final String libraryFileName = libraryPrefix + libraryName + librarySuffix;

public void loadLibraryFromJar() {

final File temp;

try {

temp = File.createTempFile(libraryPrefix + libraryName, librarySuffix);

if (temp.exists() && !temp.delete()) {

throw new RuntimeException("File: " + temp.getAbsolutePath() + " already exists and cannot be removed.");

}

if (!temp.createNewFile()) {

throw new RuntimeException("File: " + temp.getAbsolutePath() + " could not be created.");

}

if (!temp.exists()) {

throw new RuntimeException("File " + temp.getAbsolutePath() + " does not exist.");

} else {

temp.deleteOnExit();

}

// attempt to copy the library from the Jar file to the temp destination

try (final InputStream is = getClass().getClassLoader().getResourceAsStream(libraryFileName)) {

if (is == null) {

throw new RuntimeException(libraryFileName + " was not found inside JAR.");

} else {

Files.copy(is, temp.toPath(), StandardCopyOption.REPLACE_EXISTING);

}

System.load(temp.getAbsolutePath());

} catch (IOException e) {

}

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