// {{{ findLibrary
protected String findLibrary(String name) {
if (verbose) System.out.println("RJavaClassLoader.findLibrary(\"" + name + "\")");
// if (name.equals("rJava"))
// return rJavaLibPath+"/"+name+".so";
UnixFile u = (UnixFile) libMap.get(name);
String s = null;
if (u != null && u.exists()) s = u.getPath();
if (verbose) System.out.println(" - mapping to " + ((s == null) ? "<none>" : s));
return s;
}
/**
* Constructor. The first time an RJavaClassLoader is created, it is cached as the primary loader.
*
* @param path path of the rJava package
* @param libpath lib sub directory of the rJava package
*/
public RJavaClassLoader(String path, String libpath) {
super(new URL[] {});
// respect rJava.debug level
String rjd = System.getProperty("rJava.debug");
if (rjd != null && rjd.length() > 0 && !rjd.equals("0")) verbose = true;
if (verbose) System.out.println("RJavaClassLoader(\"" + path + "\",\"" + libpath + "\")");
if (primaryLoader == null) {
primaryLoader = this;
if (verbose) System.out.println(" - primary loader");
} else {
if (verbose)
System.out.println(" - NOT primrary (this=" + this + ", primary=" + primaryLoader + ")");
}
libMap = new HashMap /*<String,UnixFile>*/();
classPath = new Vector /*<UnixFile>*/();
classPath.add(new UnixDirectory(path + "/java"));
rJavaPath = path;
rJavaLibPath = libpath;
/* load the rJava library */
UnixFile so = new UnixFile(rJavaLibPath + "/rJava.so");
if (!so.exists()) so = new UnixFile(rJavaLibPath + "/rJava.dll");
if (so.exists()) libMap.put("rJava", so);
/* load the jri library */
UnixFile jri = new UnixFile(path + "/jri/libjri.so");
String rarch = System.getProperty("r.arch");
if (rarch != null && rarch.length() > 0) {
UnixFile af = new UnixFile(path + "/jri" + rarch + "/libjri.so");
if (af.exists()) jri = af;
else {
af = new UnixFile(path + "/jri" + rarch + "/jri.dll");
if (af.exists()) jri = af;
}
}
if (!jri.exists()) jri = new UnixFile(path + "/jri/libjri.jnilib");
if (!jri.exists()) jri = new UnixFile(path + "/jri/jri.dll");
if (jri.exists()) {
libMap.put("jri", jri);
if (verbose) System.out.println(" - registered JRI: " + jri);
}
/* if we are the primary loader, make us the context loader so
projects that rely on the context loader pick us */
if (primaryLoader == this) Thread.currentThread().setContextClassLoader(this);
if (verbose) {
System.out.println("RJavaClassLoader initialized.\n\nRegistered libraries:");
for (Iterator entries = libMap.keySet().iterator(); entries.hasNext(); ) {
Object key = entries.next();
System.out.println(" " + key + ": '" + libMap.get(key) + "'");
}
System.out.println("\nRegistered class paths:");
for (Enumeration e = classPath.elements(); e.hasMoreElements(); )
System.out.println(" '" + e.nextElement() + "'");
System.out.println("\n-- end of class loader report --");
}
}
/** adds an entry to the class path */
public void addClassPath(String cp) {
UnixFile f = new UnixFile(cp);
// use the URLClassLoader
if (useSystem) {
try {
addURL(f.toURL());
if (verbose)
System.out.println("RJavaClassLoader: added '" + cp + "' to the URL class path loader");
// return; // we need to add it anyway so it appears in .jclassPath()
} catch (Exception ufe) {
}
}
UnixFile g = null;
if (f.isFile() && (f.getName().endsWith(".jar") || f.getName().endsWith(".JAR"))) {
g = new UnixJarFile(cp);
if (verbose)
System.out.println(
"RJavaClassLoader: adding Java archive file '" + cp + "' to the internal class path");
} else if (f.isDirectory()) {
g = new UnixDirectory(cp);
if (verbose)
System.out.println(
"RJavaClassLoader: adding class directory '" + cp + "' to the internal class path");
} else if (verbose)
System.err.println(
f.exists()
? ("WARNING: the path '"
+ cp
+ "' is neither a directory nor a .jar file, it will NOT be added to the internal class path!")
: ("WARNING: the path '"
+ cp
+ "' does NOT exist, it will NOT be added to the internal class path!"));
if (g != null && !classPath.contains(g)) {
// this is the real meat - add it to our internal list
classPath.add(g);
// this is just cosmetics - it doesn't really have any meaning
System.setProperty(
"java.class.path",
System.getProperty("java.class.path") + File.pathSeparator + g.getPath());
}
}
