/**
* main method
*
* <p>This uses the system properties:
*
* <ul>
* <li><code>rjava.path</code> : path of the rJava package
* <li><code>rjava.lib</code> : lib sub directory of the rJava package
* <li><code>main.class</code> : main class to "boot", assumes Main if not specified
* <li><code>rjava.class.path</code> : set of paths to populate the initiate the class path
* </ul>
*
* <p>and boots the "main" method of the specified <code>main.class</code>, passing the args down
* to the booted class
*
* <p>This makes sure R and rJava are known by the class loader
*/
public static void main(String[] args) {
String rJavaPath = System.getProperty("rjava.path");
if (rJavaPath == null) {
System.err.println("ERROR: rjava.path is not set");
System.exit(2);
}
String rJavaLib = System.getProperty("rjava.lib");
if (rJavaLib == null) { // it is not really used so far, just for rJava.so, so we can guess
rJavaLib = rJavaPath + File.separator + "libs";
}
RJavaClassLoader cl = new RJavaClassLoader(u2w(rJavaPath), u2w(rJavaLib));
String mainClass = System.getProperty("main.class");
if (mainClass == null || mainClass.length() < 1) {
System.err.println("WARNING: main.class not specified, assuming 'Main'");
mainClass = "Main";
}
String classPath = System.getProperty("rjava.class.path");
if (classPath != null) {
StringTokenizer st = new StringTokenizer(classPath, File.pathSeparator);
while (st.hasMoreTokens()) {
String dirname = u2w(st.nextToken());
cl.addClassPath(dirname);
}
}
try {
cl.bootClass(mainClass, "main", args);
} catch (Exception ex) {
System.err.println("ERROR: while running main method: " + ex);
ex.printStackTrace();
}
}
/** adds several entries to the class path */
public void addClassPath(String[] cp) {
int i = 0;
while (i < cp.length) addClassPath(cp[i++]);
}