Creates a class loader and launches a target class.
/*
message("property PersistenceExecutor.TAG_REPOSITORY = "
+ System.getProperty("PersistenceExecutor.TAG_REPOSITORY"));
message("property PersistenceExecutor.TAG_CLASSPATH = "
+ System.getProperty("PersistenceExecutor.TAG_CLASSPATH"));
message("property PersistenceExecutor.TAG_LIBRARY = "
+ System.getProperty("PersistenceExecutor.TAG_LIBRARY"));
message("property PersistenceExecutor.TAG_CLASSNAME = "
+ System.getProperty("PersistenceExecutor.TAG_CLASSNAME"));
*/
// get launcher options
final String classpath = System.getProperty("java.class.path");
boolean noEnhancement = false;
boolean debug = false;
boolean timing = false;
Properties enhancerSettings = new Properties();
String targetClassname = null;
String[] targetClassArgs = null;
for (int i = 0; i < args.length; i++) {
String arg = args[i];
if (arg.equals("-h")//NOI18N
|| arg.equals("--help")) {//NOI18N
usage();
// exit gently
return;
}
if (arg.equals("-n")//NOI18N
|| arg.equals("--noEnhancement")) {//NOI18N
noEnhancement = false;
continue;
}
if (arg.equals("-t")//NOI18N
|| arg.equals("--timing")) {//NOI18N
timing = true;
enhancerSettings.setProperty(EnhancerClassLoader.DO_SIMPLE_TIMING,
"true");//NOI18N
continue;
}
if (arg.equals("-d")//NOI18N
|| arg.equals("--debug")) {//NOI18N
debug = true;
enhancerSettings.setProperty(EnhancerClassLoader.VERBOSE_LEVEL,
EnhancerClassLoader.VERBOSE_LEVEL_DEBUG);
continue;
}
if (arg.equals("-w")//NOI18N
|| arg.equals("--warn")) {//NOI18N
debug = false;
enhancerSettings.setProperty(EnhancerClassLoader.VERBOSE_LEVEL,
EnhancerClassLoader.VERBOSE_LEVEL_WARN);
continue;
}
if (arg.equals("-q")//NOI18N
|| arg.equals("--quiet")) {//NOI18N
debug = false;
enhancerSettings.setProperty(EnhancerClassLoader.VERBOSE_LEVEL,
EnhancerClassLoader.VERBOSE_LEVEL_QUIET);
continue;
}
// get target class name
targetClassname = arg;
// copy remaining arguments and leave loop
i++;
final int length = args.length - i;
targetClassArgs = new String[length];
System.arraycopy(args, i, targetClassArgs, 0, length);
break;
}
// debugging oputput
if (debug) {
out.println(prefix + "...");//NOI18N
out.println("settings and arguments:");//NOI18N
out.println(" classpath = " + classpath);//NOI18N
out.println(" noEnhancement = " + noEnhancement);//NOI18N
out.println(" debug = " + debug);//NOI18N
out.println(" enhancerSettings = {");//NOI18N
enhancerSettings.list(out);
out.println(" }");//NOI18N
out.println(" targetClassname = " + targetClassname);//NOI18N
out.print(" targetClassArgs = { ");//NOI18N
for (int i = 0; i < targetClassArgs.length; i++) {
out.print(targetClassArgs[i] + " ");//NOI18N
}
out.println("}");//NOI18N
}
// check options
if (targetClassname == null) {
usage();
throw new IllegalArgumentException("targetClassname == null");//NOI18N
}
// get class loader
final ClassLoader loader;
if (noEnhancement) {
if (debug) {
out.println(prefix + "using system class loader");//NOI18N
}
//out.println("using system class loader");
loader = PersistenceLauncher.class.getClassLoader();
} else {
if (debug) {
out.println(prefix + "creating enhancer class loader");//NOI18N
}
final Properties settings = enhancerSettings;
final PrintWriter out = PersistenceLauncher.out;
loader = new EnhancerClassLoader(classpath, settings, out);
}
// get target class' main method
Class clazz;
Method main;
try {
final String mname = "main";//NOI18N
final Class[] mparams = new Class[]{ String[].class };
final boolean init = true;
if (debug) {
out.println(prefix + "getting method "//NOI18N
+ targetClassname + "." + mname + "(String[])");//NOI18N
}
clazz = Class.forName(targetClassname, init, loader);
main = clazz.getDeclaredMethod(mname, mparams);
} catch (ClassNotFoundException e) {
// log exception only
if (debug) {
out.flush();
err.println("PersistenceLauncher: EXCEPTION SEEN: " + e);
e.printStackTrace(err);
err.flush();
}
throw e;
} catch (NoSuchMethodException e) {
// log exception only
if (debug) {
out.flush();
err.println("PersistenceLauncher: EXCEPTION SEEN: " + e);
e.printStackTrace(err);
err.flush();
}
throw e;
} catch (SecurityException e) {
// log exception only
if (debug) {
out.flush();
err.println("PersistenceLauncher: EXCEPTION SEEN: " + e);
e.printStackTrace(err);
err.flush();
}
throw e;
}
// invoke target class' main method
try {
final Object[] margs = new Object[]{ targetClassArgs };
if (debug) {
out.println("invoking method " + clazz.getName()//NOI18N
+ "." + main.getName() + "(String[])");//NOI18N
}
main.invoke(null, margs);
} catch (IllegalAccessException e) {
// log exception only
if (debug) {
out.flush();
err.println("PersistenceLauncher: EXCEPTION SEEN: " + e);
e.printStackTrace(err);
err.flush();
}
throw e;
} catch (IllegalArgumentException e) {
// log exception only
if (debug) {
out.flush();
err.println("PersistenceLauncher: EXCEPTION SEEN: " + e);
e.printStackTrace(err);
err.flush();
}
throw e;
} catch (InvocationTargetException e) {
// log exception only
if (debug) {
out.flush();
err.println("PersistenceLauncher: EXCEPTION SEEN: " + e);
e.printStackTrace(err);
err.flush();
}
throw e;
} finally {
if (timing) {
Support.timer.print();
}
}
if (debug) {
out.println(prefix + "done.");//NOI18N
out.flush();
err.flush();
}
