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com.luciad.imageio.webp.NativeLoader Maven / Gradle / Ivy
/*--------------------------------------------------------------------------
* Copyright 2007 Taro L. Saito
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*--------------------------------------------------------------------------*/
//--------------------------------------
// SQLite JDBC Project
//
// SQLite.java
// Since: 2007/05/10
//
// $URL$
// $Author$
//--------------------------------------
package com.luciad.imageio.webp;
import com.luciad.imageio.webp.util.OSInfo;
import com.luciad.imageio.webp.util.StringUtils;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
import java.util.UUID;
/**
* The library files are automatically extracted from this project's package
* (JAR).
*
* usage: call {@link #initialize()} before using the library.
*
* @author leo
*/
public class NativeLoader {
private static boolean extracted = false;
/**
* Loads native library.
*
* @return True if native library is successfully loaded; false
* otherwise.
*/
public static synchronized boolean initialize() throws Exception {
// only cleanup before the first extract
if (!extracted) {
cleanup();
}
loadNativeLibrary();
return extracted;
}
private static File getTempDir() {
return new File(System.getProperty("com.luciad.imageio.webp.tmpdir", System.getProperty("java.io.tmpdir")));
}
/**
* Deleted old native libraries e.g. on Windows the DLL file is not removed
* on VM-Exit (bug #80)
*/
static void cleanup() {
String tempFolder = getTempDir().getAbsolutePath();
File dir = new File(tempFolder);
File[] nativeLibFiles = dir.listFiles(new FilenameFilter() {
private final String searchPattern = "webp-imageio-" + getVersion();
public boolean accept(File dir, String name) {
return name.startsWith(searchPattern) && !name.endsWith(".lck");
}
});
if (nativeLibFiles != null) {
for (File nativeLibFile : nativeLibFiles) {
File lckFile = new File(nativeLibFile.getAbsolutePath() + ".lck");
if (!lckFile.exists()) {
try {
nativeLibFile.delete();
} catch (SecurityException e) {
System.err.println("Failed to delete old native lib" + e.getMessage());
}
}
}
}
}
private static boolean contentsEquals(InputStream in1, InputStream in2) throws IOException {
if (!(in1 instanceof BufferedInputStream)) {
in1 = new BufferedInputStream(in1);
}
if (!(in2 instanceof BufferedInputStream)) {
in2 = new BufferedInputStream(in2);
}
int ch = in1.read();
while (ch != -1) {
int ch2 = in2.read();
if (ch != ch2) {
return false;
}
ch = in1.read();
}
int ch2 = in2.read();
return ch2 == -1;
}
/**
* Extracts and loads the specified library file to the target folder
*
* @param libFolderForCurrentOS Library path.
* @param libraryFileName Library name.
* @param targetFolder Target folder.
* @return
*/
private static boolean extractAndLoadLibraryFile(String libFolderForCurrentOS, String libraryFileName,
String targetFolder) {
String nativeLibraryFilePath = libFolderForCurrentOS + "/" + libraryFileName;
// Include architecture name in temporary filename in order to avoid conflicts
// when multiple JVMs with different architectures running at the same time
String uuid = UUID.randomUUID().toString();
String extractedLibFileName = String.format("webp-imageio-%s-%s-%s", getVersion(), uuid, libraryFileName);
String extractedLckFileName = extractedLibFileName + ".lck";
File extractedLibFile = new File(targetFolder, extractedLibFileName);
File extractedLckFile = new File(targetFolder, extractedLckFileName);
try {
// Extract a native library file into the target directory
InputStream reader = NativeLoader.class.getResourceAsStream(nativeLibraryFilePath);
if (!extractedLckFile.exists()) {
new FileOutputStream(extractedLckFile).close();
}
FileOutputStream writer = new FileOutputStream(extractedLibFile);
try {
byte[] buffer = new byte[8192];
int bytesRead = 0;
while ((bytesRead = reader.read(buffer)) != -1) {
writer.write(buffer, 0, bytesRead);
}
} finally {
// Delete the extracted lib file on JVM exit.
extractedLibFile.deleteOnExit();
extractedLckFile.deleteOnExit();
if (writer != null) {
writer.close();
}
if (reader != null) {
reader.close();
}
}
// Set executable (x) flag to enable Java to load the native library
extractedLibFile.setReadable(true);
extractedLibFile.setWritable(true, true);
extractedLibFile.setExecutable(true);
// Check whether the contents are properly copied from the resource folder
{
InputStream nativeIn = NativeLoader.class.getResourceAsStream(nativeLibraryFilePath);
InputStream extractedLibIn = new FileInputStream(extractedLibFile);
try {
if (!contentsEquals(nativeIn, extractedLibIn)) {
throw new RuntimeException(String.format("Failed to write a native library file at %s", extractedLibFile));
}
} finally {
if (nativeIn != null) {
nativeIn.close();
}
if (extractedLibIn != null) {
extractedLibIn.close();
}
}
}
return loadNativeLibrary(targetFolder, extractedLibFileName);
} catch (IOException e) {
System.err.println(e.getMessage());
return false;
}
}
/**
* Loads native library using the given path and name of the library.
*
* @param path Path of the native library.
* @param name Name of the native library.
* @return True for successfully loading; false otherwise.
*/
private static boolean loadNativeLibrary(String path, String name) {
File libPath = new File(path, name);
if (libPath.exists()) {
try {
System.load(new File(path, name).getAbsolutePath());
return true;
} catch (UnsatisfiedLinkError e) {
System.err.println("Failed to load native library:" + name + ". osinfo: " + OSInfo.getNativeLibFolderPathForCurrentOS());
System.err.println(e);
return false;
}
} else {
return false;
}
}
/**
* Loads native library using given path and name of the library.
*
* @throws
*/
private static void loadNativeLibrary() throws Exception {
if (extracted) {
return;
}
List triedPaths = new LinkedList<>();
String nativeLibraryName = System.mapLibraryName("webp-imageio");
// Load the os-dependent library from the jar file
String nativeLibraryPath = String.format("/native/%s", OSInfo.getNativeLibFolderPathForCurrentOS());
boolean hasNativeLib = hasResource(nativeLibraryPath + "/" + nativeLibraryName);
if (hasNativeLib) {
// temporary library folder
String tempFolder = getTempDir().getAbsolutePath();
// Try extracting the library from jar
if (extractAndLoadLibraryFile(nativeLibraryPath, nativeLibraryName, tempFolder)) {
extracted = true;
return;
} else {
triedPaths.add(nativeLibraryPath);
}
}
// As a last resort try from java.library.path
String javaLibraryPath = System.getProperty("java.library.path", "");
for (String ldPath : javaLibraryPath.split(File.pathSeparator)) {
if (ldPath.isEmpty()) {
continue;
}
if (loadNativeLibrary(ldPath, nativeLibraryName)) {
extracted = true;
return;
} else {
triedPaths.add(ldPath);
}
}
extracted = false;
throw new Exception(String.format("No native library found for os.name=%s, os.arch=%s, paths=[%s]",
OSInfo.getOSName(), OSInfo.getArchName(), StringUtils.join(triedPaths, File.pathSeparator)));
}
private static boolean hasResource(String path) {
return NativeLoader.class.getResource(path) != null;
}
@SuppressWarnings("unused")
private static void getNativeLibraryFolderForTheCurrentOS() {
String osName = OSInfo.getOSName();
String archName = OSInfo.getArchName();
}
/**
* @return The major version of the library.
*/
public static int getMajorVersion() {
String[] c = getVersion().split("\\.");
return (c.length > 0) ? Integer.parseInt(c[0]) : 1;
}
/**
* @return The minor version of the library.
*/
public static int getMinorVersion() {
String[] c = getVersion().split("\\.");
return (c.length > 1) ? Integer.parseInt(c[1]) : 0;
}
/**
* @return The version of the library.
*/
public static String getVersion() {
URL versionFile = NativeLoader.class.getResource("/META-INF/maven/com.github.gotson/webp-imageio/pom.properties");
if (versionFile == null) {
versionFile = NativeLoader.class.getResource("/META-INF/maven/com.github.gotson/webp-imageio/VERSION");
}
String version = "unknown";
try {
if (versionFile != null) {
Properties versionData = new Properties();
versionData.load(versionFile.openStream());
version = versionData.getProperty("version", version);
version = version.trim().replaceAll("[^0-9\\.]", "");
}
} catch (IOException e) {
System.err.println(e);
}
return version;
}
}
