private String[] loadPlugin(String name, String pluginSpec, String[] cmdArgs) {
assert (_communicator != null);
//
// We support the following formats:
//
// <class-name> [args]
// <jar-file>:<class-name> [args]
// <class-dir>:<class-name> [args]
// "<path with spaces>":<class-name> [args]
// "<path with spaces>:<class-name>" [args]
//
String[] args;
try {
args = com.zeroc.IceUtilInternal.Options.split(pluginSpec);
} catch (com.zeroc.IceUtilInternal.Options.BadQuote ex) {
throw new PluginInitializationException(
"invalid arguments for plug-in `" + name + "':\n" + ex.getMessage());
}
assert (args.length > 0);
final String entryPoint = args[0];
final boolean isWindows = System.getProperty("os.name").startsWith("Windows");
boolean absolutePath = false;
//
// Find first ':' that isn't part of the file path.
//
int pos = entryPoint.indexOf(':');
if (isWindows) {
final String driveLetters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
if (pos == 1
&& entryPoint.length() > 2
&& driveLetters.indexOf(entryPoint.charAt(0)) != -1
&& (entryPoint.charAt(2) == '\\' || entryPoint.charAt(2) == '/')) {
absolutePath = true;
pos = entryPoint.indexOf(':', pos + 1);
}
if (!absolutePath) {
absolutePath = entryPoint.startsWith("\\\\");
}
} else {
absolutePath = entryPoint.startsWith("/");
}
if ((pos == -1 && absolutePath) || (pos != -1 && entryPoint.length() <= pos + 1)) {
//
// Class name is missing.
//
throw new PluginInitializationException(
"invalid entry point for plug-in `" + name + "':\n" + entryPoint);
}
//
// Extract the JAR file or subdirectory, if any.
//
String classDir = null; // Path name of JAR file or subdirectory.
String className;
if (pos == -1) {
className = entryPoint;
} else {
classDir = entryPoint.substring(0, pos).trim();
className = entryPoint.substring(pos + 1).trim();
}
//
// Shift the arguments.
//
String[] tmp = new String[args.length - 1];
System.arraycopy(args, 1, tmp, 0, args.length - 1);
args = tmp;
//
// Convert command-line options into properties. First we
// convert the options from the plug-in configuration, then
// we convert the options from the application command-line.
//
Properties properties = _communicator.getProperties();
args = properties.parseCommandLineOptions(name, args);
cmdArgs = properties.parseCommandLineOptions(name, cmdArgs);
//
// Instantiate the class.
//
PluginFactory pluginFactory = null;
try {
Class<?> c = null;
//
// Use a class loader if the user specified a JAR file or class directory.
//
if (classDir != null) {
try {
if (!absolutePath) {
classDir =
new java.io.File(System.getProperty("user.dir") + java.io.File.separator + classDir)
.getCanonicalPath();
}
if (!classDir.endsWith(java.io.File.separator)
&& !classDir.toLowerCase().endsWith(".jar")) {
classDir += java.io.File.separator;
}
classDir = URLEncoder.encode(classDir, "UTF-8");
//
// Reuse an existing class loader if we have already loaded a plug-in with
// the same value for classDir, otherwise create a new one.
//
ClassLoader cl = null;
if (_classLoaders == null) {
_classLoaders = new java.util.HashMap<>();
} else {
cl = _classLoaders.get(classDir);
}
if (cl == null) {
final java.net.URL[] url =
new java.net.URL[] {new java.net.URL("file", null, classDir)};
//
// Use the custom class loader (if any) as the parent.
//
if (_instance.initializationData().classLoader != null) {
cl = new java.net.URLClassLoader(url, _instance.initializationData().classLoader);
} else {
cl = new java.net.URLClassLoader(url);
}
_classLoaders.put(classDir, cl);
}
c = cl.loadClass(className);
} catch (java.net.MalformedURLException ex) {
throw new PluginInitializationException(
"invalid entry point format `" + pluginSpec + "'", ex);
} catch (java.io.IOException ex) {
throw new PluginInitializationException(
"invalid path in entry point `" + pluginSpec + "'", ex);
} catch (java.lang.ClassNotFoundException ex) {
// Ignored
}
} else {
c = com.zeroc.IceInternal.Util.getInstance(_communicator).findClass(className);
}
if (c == null) {
throw new PluginInitializationException("class " + className + " not found");
}
java.lang.Object obj = c.newInstance();
try {
pluginFactory = (PluginFactory) obj;
} catch (ClassCastException ex) {
throw new PluginInitializationException(
"class " + className + " does not implement PluginFactory", ex);
}
} catch (IllegalAccessException ex) {
throw new PluginInitializationException(
"unable to access default constructor in class " + className, ex);
} catch (InstantiationException ex) {
throw new PluginInitializationException("unable to instantiate class " + className, ex);
}
//
// Invoke the factory.
//
Plugin plugin = null;
try {
plugin = pluginFactory.create(_communicator, name, args);
} catch (PluginInitializationException ex) {
throw ex;
} catch (Throwable ex) {
throw new PluginInitializationException("exception in factory " + className, ex);
}
if (plugin == null) {
throw new PluginInitializationException("failure in factory " + className);
}
PluginInfo info = new PluginInfo();
info.name = name;
info.plugin = plugin;
_plugins.add(info);
return cmdArgs;
}