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/*
* Author : Rishi Gupta
*
* This file is part of 'serial communication manager' library.
* Copyright (C) <2014-2016>
*
* This 'serial communication manager' is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later version.
*
* The 'serial communication manager' is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with 'serial communication manager'. If not, see
* This class is an interface between java and native shared library. The native
* library is found in 'lib-bluetooth' folder in 'scm-x.x.x.jar' file.
*
*
* @author Rishi Gupta
*/
public final class SerialComBluetoothJNIBridge {
/**
*
* Allocates a new SerialComBluetoothJNIBridge object.
*
*/
public SerialComBluetoothJNIBridge() {
}
/**
*
* Extract native library from jar in a working directory, load and link it.
* The 'lib-bluetooth' folder in 'scm-x.x.x.jar' file is searched for the required
* native library for bluetooth communication.
*
*
* @param directoryPath
* null for default directory or user supplied directory path.
* @param loadedLibName
* null for default name or user supplied name of loaded library.
* @param serialComSystemProperty
* instance of SerialComSystemProperty to get required java
* properties.
* @param cpuArch
* architecture of CPU this library is running on.
* @param osType
* operating system this library is running on.
* @param javaABIType
* binary application interface type to correctly link.
* @throws SecurityException
* if java system properties can not be accessed.
* @throws SerialComUnexpectedException
* if java system property is null.
* @throws SerialComLoadException
* if any file system related issue occurs.
* @throws UnsatisfiedLinkError
* if loading/linking shared library fails.
*/
public static boolean loadNativeLibrary(String directoryPath, String loadedLibName,
SerialComSystemProperty serialComSystemProperty, int osType, int cpuArch, int javaABIType,
int btStack) throws SerialComUnexpectedException, SerialComLoadException {
String javaTmpDir = null;
String userHomeDir = null;
String fileSeparator = null;
File baseDir = null;
File workingDir = null;
boolean isTmpDir = false;
boolean isUserHomeDir = false;
String libToExtractFromJar = null;
File libFile = null;
String libExtension = null;
InputStream input = null;
FileOutputStream output = null;
String stackName = null;
if (btStack == SerialComBluetooth.BTSTACK_LINUX_BLUEZ) {
stackName = "btbluez";
}
fileSeparator = serialComSystemProperty.getfileSeparator();
if (fileSeparator == null) {
throw new SerialComUnexpectedException("The file.separator java system property is null in the system !");
}
/*
* Prepare directory in which native shared library will be extracted
* from jar
*/
if (directoryPath == null) {
// user did not supplied any directory path so try tmp and user home
javaTmpDir = serialComSystemProperty.getJavaIOTmpDir();
if (javaTmpDir == null) {
throw new SerialComUnexpectedException("The java.io.tmpdir java system property is null in the system !");
}
baseDir = new File(javaTmpDir);
if (baseDir.exists() && baseDir.isDirectory() && baseDir.canWrite()) {
isTmpDir = true;
// temp directory will be used
} else {
// access to temp directory failed, let us try access to user's
// home directory
userHomeDir = serialComSystemProperty.getUserHome();
if (userHomeDir == null) {
throw new SerialComUnexpectedException(
"The user.home java system property is null in the system !");
}
baseDir = new File(userHomeDir);
if (!baseDir.exists()) {
throw new SerialComLoadException(
"User home directory does not exist. Also unable to access tmp/temp directory !");
}
if (!baseDir.isDirectory()) {
throw new SerialComLoadException(
"User home directory is not a directory. Also unable to access tmp/temp directory !");
}
if (!baseDir.canWrite()) {
throw new SerialComLoadException(
"User home directory is not writeable (permissions ??). Also unable to access tmp/temp directory !");
}
isUserHomeDir = true;
}
// for tmp or user home create unique directory inside them for our
// use only
workingDir = new File(baseDir.toString() + fileSeparator
+ "scm_tuartx1");
if (!workingDir.exists()) {
if (!workingDir.mkdir()) {
if (isTmpDir == true) {
throw new SerialComLoadException(
"Can not create scm_tuartx1 unique directory in temp directory !");
} else if (isUserHomeDir == true) {
throw new SerialComLoadException(
"Can not create scm_tuartx1 unique directory in user home directory !");
} else {
}
}
}
} else {
// user specified directory, so try it
baseDir = new File(directoryPath);
if (!baseDir.exists()) {
throw new SerialComLoadException("Given " + directoryPath
+ " directory does not exist !");
}
if (!baseDir.isDirectory()) {
throw new SerialComLoadException("Given " + directoryPath
+ " is not a directory !");
}
if (!baseDir.canWrite()) {
throw new SerialComLoadException("Given " + directoryPath
+ " directory is not writeable !");
}
// for user specified directory base itself will be working
// directory
workingDir = baseDir;
}
/*
* Find the native library that will be extracted based on arch and os
* type
*/
if (cpuArch == SerialComManager.ARCH_AMD64) {
switch (osType) {
case SerialComManager.OS_WINDOWS:
libToExtractFromJar = "win" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_x86_64.dll";
libExtension = ".dll";
break;
case SerialComManager.OS_LINUX:
libToExtractFromJar = "linux" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_x86_64.so";
libExtension = ".so";
break;
case SerialComManager.OS_MAC_OS_X:
libToExtractFromJar = "mac" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_x86_64.dylib";
libExtension = ".dylib";
break;
default:
}
} else if (cpuArch == SerialComManager.ARCH_X86) {
switch (osType) {
case SerialComManager.OS_WINDOWS:
libToExtractFromJar = "win" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_x86.dll";
libExtension = ".dll";
break;
case SerialComManager.OS_LINUX:
libToExtractFromJar = "linux" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_x86.so";
libExtension = ".so";
break;
case SerialComManager.OS_MAC_OS_X:
libToExtractFromJar = "mac" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_x86.dylib";
libExtension = ".dylib";
break;
default:
}
} else if (cpuArch == SerialComManager.ARCH_ARMV7) {
if (osType == SerialComManager.OS_LINUX) {
libExtension = ".so";
if (javaABIType == SerialComManager.ABI_ARMHF) {
libToExtractFromJar = "linux" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_armv7hf.so";
} else if (javaABIType == SerialComManager.ABI_ARMEL) {
libToExtractFromJar = "linux" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_armv7el.so";
} else {
}
}
} else if (cpuArch == SerialComManager.ARCH_ARMV6) {
if (osType == SerialComManager.OS_LINUX) {
libExtension = ".so";
if (javaABIType == SerialComManager.ABI_ARMHF) {
libToExtractFromJar = "linux" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_armv6hf.so";
} else if (javaABIType == SerialComManager.ABI_ARMEL) {
libToExtractFromJar = "linux" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_armv6el.so";
} else {
}
}
} else if (cpuArch == SerialComManager.ARCH_ARMV5) {
if (osType == SerialComManager.OS_LINUX) {
libExtension = ".so";
libToExtractFromJar = "linux" + stackName + "_"
+ SerialComManager.JAVA_LIB_VERSION + "_armv5.so";
}
} else {
}
/* Extract shared library from jar into working directory */
try {
if (loadedLibName == null) {
libFile = new File(workingDir.getAbsolutePath() + fileSeparator
+ libToExtractFromJar);
} else {
libFile = new File(workingDir.getAbsolutePath() + fileSeparator
+ loadedLibName.trim() + libExtension);
}
input = SerialComHIDJNIBridge.class.getResourceAsStream("/lib-bluetooth/"
+ libToExtractFromJar);
output = new FileOutputStream(libFile);
if (input != null) {
int read;
byte[] buffer = new byte[4096];
while ((read = input.read(buffer)) != -1) {
output.write(buffer, 0, read);
}
output.flush();
output.close();
output = null;
if ((libFile != null) && libFile.exists() && libFile.isFile()) {
// congratulations successfully extracted
} else {
throw new SerialComLoadException(
"Can not extract native shared library "
+ libToExtractFromJar
+ " from scm-x.x.x.jar file !");
}
} else {
throw new SerialComLoadException(
"Can not get shared library "
+ libToExtractFromJar
+ " resource as stream from scm-x.x.x.jar file using class loader !");
}
} catch (Exception e) {
throw (SerialComLoadException) new SerialComLoadException(
libFile.toString()).initCause(e);
} finally {
try {
if (output != null) {
output.close();
}
} catch (Exception e) {
// ignore
}
try {
if (input != null) {
input.close();
}
} catch (Exception e) {
// ignore
}
}
/*
* Try loading the dynamic shared library from the local file system
* finally
*/
try {
System.load(libFile.toString());
} catch (Exception e) {
throw (UnsatisfiedLinkError) new UnsatisfiedLinkError(
"Could not load " + libFile.toString()
+ " native library !").initCause(e);
}
return true;
}
public native String[] listBluetoothAdaptorsWithInfo();
}
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