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package org.openecomp.sdc.toscaparser.utils;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.io.MoreFiles;
import com.google.common.io.RecursiveDeleteOption;
public class JarExtractor {
private static final Logger LOGGER = LoggerFactory.getLogger(JarExtractor.class);
private static final String PYTHON_DEPENDENCIES_PATH = "Lib/site-packages";
private static final String TEMP_DIR_PREFIX = "__tosca__";
public Path extractPyhtonPackages() throws IOException {
String codePath = getCodePath();
if (!isRunningInJar(codePath)) {
LOGGER.info("#extractPyhtonPackages - Nothing to extract, we're not running in a jar file.");
return null;
}
Path tempDirPath = createTempDirectory();
String tempDirName = tempDirPath.toString();
extractJarDirectory(codePath, tempDirName);
LOGGER.info("#extractPyhtonPackages - End. Extracted python dependencies to {}", tempDirName);
return tempDirPath;
}
private Path createTempDirectory() throws IOException {
Path tempDir = Files.createTempDirectory(TEMP_DIR_PREFIX);
LOGGER.debug("#createTempDirectory - tempDir created: {}", tempDir);
return tempDir;
}
private void extractJarDirectory(String jarDir, String tempDir) throws IOException {
try (JarFile jarFile = new JarFile(jarDir)) {
Enumeration<JarEntry> entries = jarFile.entries();
while (entries.hasMoreElements()) {
JarEntry entry = entries.nextElement();
if (shouldExtract(entry)) {
extract(jarFile, entry, tempDir);
}
}
}
}
private void extract(JarFile jarFile, JarEntry entry, String tempDirName) throws IOException {
try (InputStream source = jarFile.getInputStream(entry)) {
Path targetPath = Paths.get(tempDirName, entry.getName());
Files.createDirectories(targetPath.getParent());
Files.copy(source, targetPath);
}
}
private boolean shouldExtract(JarEntry entry) {
return !entry.isDirectory() && entry.getName()
.startsWith(PYTHON_DEPENDENCIES_PATH);
}
private String getCodePath() {
String codePath = this.getClass()
.getProtectionDomain()
.getCodeSource()
.getLocation()
.getFile();
LOGGER.debug("#getCodePath - codePath: {}", codePath);
return codePath;
}
private boolean isRunningInJar(String path) {
return path.endsWith(".jar");
}
public void deleteDirectory(Path path) throws IOException {
MoreFiles.deleteRecursively(path, RecursiveDeleteOption.ALLOW_INSECURE);
LOGGER.info("#deleteDirectory - deleted temp directory: {}", path);
}
}
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