/**
* A Factory class for creating EJBObject input/output Stream
*
* @author Mahesh Kannan
*/
public class J2EEObjectStreamFactoryImpl implements J2EEObjectStreamFactory {
private static final Logger _ejbLogger = LogDomains.getLogger(LogDomains.EJB_LOGGER);
public J2EEObjectStreamFactoryImpl() {}
/**
* Obtain an ObjectOutputStream that allows serialization of a graph of objects. The objects can
* be plain Serializable objects or can be converted into Serializable objects using the handler
*
* @throws IOException when the serialziation fails
* @return an ObjectOutputStream that can be used to serialize objects
*/
public ObjectOutputStream createObjectOutputStream(
final OutputStream os,
final boolean replaceObject,
final NonSerializableObjectHandler handler)
throws IOException {
// Need privileged block here because EJBObjectOutputStream
// does enableReplaceObject
ObjectOutputStream oos = null;
if (System.getSecurityManager() == null) {
oos = new EJBObjectOutputStream(os, replaceObject, handler);
} else {
try {
oos =
(ObjectOutputStream)
AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public java.lang.Object run() throws Exception {
return new EJBObjectOutputStream(os, replaceObject, handler);
}
});
} catch (PrivilegedActionException ex) {
throw (IOException) ex.getException();
}
}
return oos;
}
/**
* Obtain an ObjectInputStream that allows de-serialization of a graph of objects.
*
* @throws IOException when the de-serialziation fails
* @return an ObjectInputStream that can be used to deserialize objects
*/
public ObjectInputStream createObjectInputStream(
final InputStream is, final boolean resolveObject, final ClassLoader loader)
throws Exception {
ObjectInputStream ois = null;
if (loader != null) {
// Need privileged block here because EJBObjectInputStream
// does enableResolveObject
if (System.getSecurityManager() == null) {
ois = new EJBObjectInputStream(is, loader, resolveObject);
} else {
try {
ois =
(ObjectInputStream)
AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public java.lang.Object run() throws Exception {
return new EJBObjectInputStream(is, loader, resolveObject);
}
});
} catch (PrivilegedActionException ex) {
throw (IOException) ex.getException();
}
}
} else {
ois = new ObjectInputStream(is);
}
return ois;
}
}
/** Handy class full of static functions. */
public final class Utility {
static Logger _logger = LogDomains.getLogger(Utility.class, LogDomains.UTIL_LOGGER);
private static LocalStringManagerImpl localStrings = new LocalStringManagerImpl(Utility.class);
public static void checkJVMVersion() {
// do not perform any JVM version checking
}
public static Properties getPropertiesFromFile(String file) throws IOException {
InputStream is = ClassLoader.getSystemResourceAsStream(file);
if (is != null) {
Properties config = new Properties();
config.load(is);
return config;
} else {
String remoteclient = "/" + file;
InputStream is2 = Utility.class.getResourceAsStream(remoteclient);
Properties config = new Properties();
config.load(is2);
return config;
}
}
/** Return the hostname of the local machine. */
public static String getLocalHost() {
String hostname = null;
try {
InetAddress ia = InetAddress.getLocalHost();
hostname = ia.getHostName();
} catch (UnknownHostException e) {
return "localhost";
}
return hostname;
}
/** Return the hostname of the local machine. */
public static String getLocalAddress() {
String address = null;
try {
InetAddress ia = InetAddress.getLocalHost();
address = ia.getHostAddress();
} catch (UnknownHostException e) {
return "127.0.0.1";
}
return address;
}
/**
* This is a convenience method to lookup a remote object by name within the naming context.
*
* @exception javax.naming.NamingException if the object with that name could not be found.
*/
public static java.rmi.Remote lookupObject(String publishedName, java.lang.Class anInterface)
throws javax.naming.NamingException {
Context ic = new InitialContext();
java.lang.Object objRef = ic.lookup(publishedName);
return (java.rmi.Remote) PortableRemoteObject.narrow(objRef, anInterface);
}
/**
* Unmarshal a byte array to an integer. Assume the bytes are in BIGENDIAN order. i.e.
* array[offset] is the most-significant-byte and array[offset+3] is the least-significant-byte.
*
* @param array The array of bytes.
* @param offset The offset from which to start unmarshalling.
*/
public static int bytesToInt(byte[] array, int offset) {
int b1, b2, b3, b4;
b1 = (array[offset++] << 24) & 0xFF000000;
b2 = (array[offset++] << 16) & 0x00FF0000;
b3 = (array[offset++] << 8) & 0x0000FF00;
b4 = (array[offset++] << 0) & 0x000000FF;
return (b1 | b2 | b3 | b4);
}
/**
* Marshal an integer to a byte array. The bytes are in BIGENDIAN order. i.e. array[offset] is the
* most-significant-byte and array[offset+3] is the least-significant-byte.
*
* @param array The array of bytes.
* @param offset The offset from which to start marshalling.
*/
public static void intToBytes(int value, byte[] array, int offset) {
array[offset++] = (byte) ((value >>> 24) & 0xFF);
array[offset++] = (byte) ((value >>> 16) & 0xFF);
array[offset++] = (byte) ((value >>> 8) & 0xFF);
array[offset++] = (byte) ((value >>> 0) & 0xFF);
}
/**
* Unmarshal a byte array to an long. Assume the bytes are in BIGENDIAN order. i.e. array[offset]
* is the most-significant-byte and array[offset+7] is the least-significant-byte.
*
* @param array The array of bytes.
* @param offset The offset from which to start unmarshalling.
*/
public static long bytesToLong(byte[] array, int offset) {
long l1, l2;
l1 = (long) bytesToInt(array, offset) << 32;
l2 = (long) bytesToInt(array, offset + 4) & 0xFFFFFFFFL;
return (l1 | l2);
}
/**
* Marshal an long to a byte array. The bytes are in BIGENDIAN order. i.e. array[offset] is the
* most-significant-byte and array[offset+7] is the least-significant-byte.
*
* @param array The array of bytes.
* @param offset The offset from which to start marshalling.
*/
public static void longToBytes(long value, byte[] array, int offset) {
array[offset++] = (byte) ((value >>> 56) & 0xFF);
array[offset++] = (byte) ((value >>> 48) & 0xFF);
array[offset++] = (byte) ((value >>> 40) & 0xFF);
array[offset++] = (byte) ((value >>> 32) & 0xFF);
array[offset++] = (byte) ((value >>> 24) & 0xFF);
array[offset++] = (byte) ((value >>> 16) & 0xFF);
array[offset++] = (byte) ((value >>> 8) & 0xFF);
array[offset++] = (byte) ((value >>> 0) & 0xFF);
}
/** Verify and invoke main if present in the specified class. */
public static void invokeApplicationMain(Class mainClass, String[] args)
throws InvocationTargetException, IllegalAccessException, ClassNotFoundException {
String err = localStrings.getLocalString("utility.no.main", "", new Object[] {mainClass});
// determine the main method using reflection
// verify that it is public static void and takes
// String[] as the only argument
Method mainMethod = null;
try {
mainMethod = mainClass.getMethod("main", new Class[] {String[].class});
} catch (NoSuchMethodException msme) {
_logger.log(Level.SEVERE, "enterprise_util.excep_in_utility", msme);
throw new ClassNotFoundException(err);
}
// check modifiers: public static
int modifiers = mainMethod.getModifiers();
if (!Modifier.isPublic(modifiers) || !Modifier.isStatic(modifiers)) {
err =
localStrings.getLocalString(
"utility.main.notpublicorstatic",
"The main method is either not public or not static");
_logger.log(Level.SEVERE, "enterprise_util.excep_in_utility_main.notpublicorstatic");
throw new ClassNotFoundException(err);
}
// check return type and exceptions
if (!mainMethod.getReturnType().equals(Void.TYPE)) {
err =
localStrings.getLocalString(
"utility.main.notvoid", "The main method's return type is not void ");
_logger.log(Level.SEVERE, "enterprise_util.excep_in_utility_main.notvoid");
throw new ClassNotFoundException(err);
}
// build args to the main and call it
Object params[] = new Object[1];
params[0] = args;
mainMethod.invoke(null, params);
}
public static void invokeSetMethod(Object obj, String prop, String value)
throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
Class cl = obj.getClass();
// change first letter to uppercase
String setMeth = "set" + prop.substring(0, 1).toUpperCase() + prop.substring(1);
// try string method
try {
Class[] cldef = {String.class};
Method meth = cl.getMethod(setMeth, cldef);
Object[] params = {value};
meth.invoke(obj, params);
return;
} catch (NoSuchMethodException ex) {
try {
// try int method
Class[] cldef = {Integer.TYPE};
Method meth = cl.getMethod(setMeth, cldef);
Object[] params = {Integer.valueOf(value)};
meth.invoke(obj, params);
return;
} catch (NoSuchMethodException nsmex) {
// try boolean method
Class[] cldef = {Boolean.TYPE};
Method meth = cl.getMethod(setMeth, cldef);
Object[] params = {Boolean.valueOf(value)};
meth.invoke(obj, params);
return;
}
}
}
public static void invokeSetMethodCaseInsensitive(Object obj, String prop, String value)
throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
String alternateMethodName = null;
Class cl = obj.getClass();
String setMeth = "set" + prop;
Method[] methodsList = cl.getMethods();
boolean methodFound = false;
int i = 0;
for (i = 0; i < methodsList.length; ++i) {
if (methodsList[i].getName().equalsIgnoreCase(setMeth) == true) {
Class[] parameterTypes = methodsList[i].getParameterTypes();
if (parameterTypes.length == 1) {
if (parameterTypes[0].getName().equals("java.lang.String")) {
methodFound = true;
break;
} else alternateMethodName = methodsList[i].getName();
}
}
}
if (methodFound == true) {
Object[] params = {value};
methodsList[i].invoke(obj, params);
return;
}
if (alternateMethodName != null) {
try {
// try int method
Class[] cldef = {Integer.TYPE};
Method meth = cl.getMethod(alternateMethodName, cldef);
Object[] params = {Integer.valueOf(value)};
meth.invoke(obj, params);
return;
} catch (NoSuchMethodException nsmex) {
// try boolean method
Class[] cldef = {Boolean.TYPE};
Method meth = cl.getMethod(alternateMethodName, cldef);
Object[] params = {Boolean.valueOf(value)};
meth.invoke(obj, params);
return;
}
} else throw new NoSuchMethodException(setMeth);
}
// Ports are marshalled as shorts on the wire. The IDL
// type is unsigned short, which lacks a convenient representation
// in Java in the 32768-65536 range. So, we treat ports as
// ints throught this code, except that marshalling requires a
// scaling conversion. intToShort and shortToInt are provided
// for this purpose.
public static short intToShort(int value) {
if (value > 32767) return (short) (value - 65536);
return (short) value;
}
public static int shortToInt(short value) {
if (value < 0) return value + 65536;
return value;
}
/**
* Get the current thread's context class loader which is set to the CommonClassLoader by
* ApplicationServer
*
* @return the thread's context classloader if it exists; else the system class loader.
*/
public static ClassLoader getClassLoader() {
if (Thread.currentThread().getContextClassLoader() != null) {
return Thread.currentThread().getContextClassLoader();
} else {
return ClassLoader.getSystemClassLoader();
}
}
/**
* Loads the class with the common class loader.
*
* @param className the class name
* @return the loaded class
* @exception if the class is not found.
*/
public static Class loadClass(String className) throws ClassNotFoundException {
return getClassLoader().loadClass(className);
}
/** Utility routine for setting the context class loader. Returns previous class loader. */
public static ClassLoader setContextClassLoader(ClassLoader newClassLoader) {
// Can only reference final local variables from dopriveleged block
final ClassLoader classLoaderToSet = newClassLoader;
final Thread currentThread = Thread.currentThread();
ClassLoader originalClassLoader = currentThread.getContextClassLoader();
if (classLoaderToSet != originalClassLoader) {
if (System.getSecurityManager() == null) {
currentThread.setContextClassLoader(classLoaderToSet);
} else {
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public java.lang.Object run() {
currentThread.setContextClassLoader(classLoaderToSet);
return null;
}
});
}
}
return originalClassLoader;
}
public static void setEnvironment() {
Environment.obtain().activateEnvironment();
}
/**
* Return the value for a given name from the System Properties or the Environmental Variables.
* The former overrides the latter.
*
* @param name - the name of the System Property or Environmental Variable
* @return the value of the variable or null if it was not found
*/
public static String getEnvOrProp(String name) {
// System properties override env. variables
String envVal = System.getenv(name);
String sysPropVal = System.getProperty(name);
if (sysPropVal != null) return sysPropVal;
return envVal;
}
/**
* Convert the byte array to char array with respect to given charset.
*
* @param byteArray
* @param charset null or "" means default charset
* @exception CharacterCodingException
*/
public static char[] convertByteArrayToCharArray(byte[] byteArray, String charset)
throws CharacterCodingException {
if (byteArray == null) {
return null;
}
byte[] bArray = (byte[]) byteArray.clone();
ByteBuffer byteBuffer = ByteBuffer.wrap(bArray);
Charset charSet;
if (charset == null || "".equals(charset)) {
charSet = Charset.defaultCharset();
} else if (Charset.isSupported(charset)) {
charSet = Charset.forName(charset);
} else {
CharacterCodingException e = new CharacterCodingException();
e.initCause(new UnsupportedCharsetException(charset));
throw e;
}
CharsetDecoder decoder = charSet.newDecoder();
CharBuffer charBuffer = null;
try {
charBuffer = decoder.decode(byteBuffer);
} catch (CharacterCodingException cce) {
throw cce;
} catch (Throwable t) {
CharacterCodingException e = new CharacterCodingException();
e.initCause(t);
throw e;
}
char[] result = (char[]) charBuffer.array().clone();
clear(byteBuffer);
clear(charBuffer);
return result;
}
/**
* Convert the char array to byte array with respect to given charset.
*
* @param charArray
* @param strCharset null or "" means default charset
* @exception CharacterCodingException
*/
public static byte[] convertCharArrayToByteArray(char[] charArray, String strCharset)
throws CharacterCodingException {
if (charArray == null) {
return null;
}
char[] cArray = (char[]) charArray.clone();
CharBuffer charBuffer = CharBuffer.wrap(cArray);
Charset charSet;
if (strCharset == null || "".equals(strCharset)) {
charSet = Charset.defaultCharset();
} else if (Charset.isSupported(strCharset)) {
charSet = Charset.forName(strCharset);
} else {
CharacterCodingException e = new CharacterCodingException();
e.initCause(new UnsupportedCharsetException(strCharset));
throw e;
}
CharsetEncoder encoder = charSet.newEncoder();
ByteBuffer byteBuffer = null;
try {
byteBuffer = encoder.encode(charBuffer);
} catch (CharacterCodingException cce) {
throw cce;
} catch (Throwable t) {
CharacterCodingException e = new CharacterCodingException();
e.initCause(t);
throw e;
}
byte[] result = new byte[byteBuffer.remaining()];
byteBuffer.get(result);
clear(byteBuffer);
clear(charBuffer);
return result.clone();
}
private static void clear(ByteBuffer byteBuffer) {
byte[] bytes = byteBuffer.array();
for (int i = 0; i < bytes.length; i++) {
bytes[i] = 0;
}
}
private static void clear(CharBuffer charBuffer) {
char[] chars = charBuffer.array();
for (int i = 0; i < chars.length; i++) {
chars[i] = '0';
}
}
}
