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import java.io.File;
import java.io.InputStream;
import java.io.FileOutputStream;
import java.util.StringTokenizer;
import java.util.zip.ZipFile;
import java.util.zip.ZipEntry;
import java.lang.reflect.Method;
public class Boot {
public static String bootFile = null;
public static String findInPath(String path, String fn) {
StringTokenizer st = new StringTokenizer(path, File.pathSeparator);
while (st.hasMoreTokens()) {
String dirname=st.nextToken();
try {
File f = new File(dirname+File.separator+fn);
if (f.isFile()) return f.getPath();
} catch (Exception fex) {}
}
return null;
}
public static String findNativeLibrary(String basename, boolean internalFirst) {
String libName = "lib"+basename;
String ext = ".so";
String os = System.getProperty("os.name");
if (os.startsWith("Win")) {
os = "Win";
ext= ".dll";
libName=basename;
}
if (os.startsWith("Mac")) {
os = "Mac";
ext= ".jnilib";
}
String fullName = libName+ext;
// first, try the system path unless instructed otherwise
if (!internalFirst) {
try {
String r = findInPath("."+File.pathSeparator+System.getProperty("java.library.path"),
fullName);
if (r != null) return r;
} catch (Exception ex1) {}
}
// second, try to locate in on the class path (in the JAR file or in one of the directories)
String cp = System.getProperty("java.class.path");
StringTokenizer st = new StringTokenizer(cp, File.pathSeparator);
while (st.hasMoreTokens()) {
String dirname=st.nextToken();
try {
File f = new File(dirname);
if (f.isFile()) {
// look in a JAR file and extract it if necessary
ZipFile jf = new ZipFile(f);
ZipEntry ze = jf.getEntry(fullName);
if (ze != null) { // found it inside a JAR file
try {
bootFile = f.toString();
File tf = File.createTempFile(basename,ext);
System.out.println("Boot.findNativeLibrary: found in a JAR ("+jf+"), extracting into "+tf);
InputStream zis = jf.getInputStream(ze);
FileOutputStream fos = new FileOutputStream(tf);
byte b[] = new byte[65536];
while (zis.available()>0) {
int n = zis.read(b);
if (n>0) fos.write(b, 0, n);
}
zis.close();
fos.close();
tf.deleteOnExit();
return tf.getPath();
} catch (Exception foo) {
}
}
} else if (f.isDirectory()) {
File ff = new File(dirname+File.separator+fullName);
if (ff.isFile()) return ff.getPath();
}
} catch(Exception ex2) {}
}
// third, try the system path if we didn't look there before
if (internalFirst) {
try {
String r = findInPath("."+File.pathSeparator+System.getProperty("java.library.path"),
fullName);
if (r != null) return r;
} catch (Exception ex3) {}
}
return null;
}
public static void main(String[] args) {
// 1) instantiate master class loader
JRIClassLoader mcl = JRIClassLoader.getMainLoader();
// 2) locate boot JNI library
String nl = findNativeLibrary("boot", false);
if (nl == null) {
System.err.println("ERROR: Unable to locate native bootstrap library.");
System.exit(1);
}
// register boot library with MCL
mcl.registerLibrary("boot", new File(nl));
// add path necessary for loading JRIBootstrap to MCL
String cp = System.getProperty("java.class.path");
StringTokenizer st = new StringTokenizer(cp, File.pathSeparator);
while (st.hasMoreTokens()) {
String p = st.nextToken();
mcl.addClassPath(p);
// we assume that the first file on the CP is us (FIXME: verify this!)
if (bootFile==null && (new File(p)).isFile()) bootFile=p;
}
// call static bootstrap method
try {
// force the use of the MCL even if the system loader could find it
Class stage2class = mcl.findAndLinkClass("JRIBootstrap");
Method m = stage2class.getMethod("bootstrap", new Class[] { String[].class });
m.invoke(null, new Object[] { args });
} catch (Exception rtx) {
System.err.println("ERROR: Unable to invoke bootstrap method in JRIBootstrap! ("+rtx+")");
rtx.printStackTrace();
System.exit(2);
}
}
}
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