Bundle-NativeCode ::= nativecode ( ',' nativecode )* ( ',' optional ) ?

/*
 * Bundle-NativeCode ::= nativecode ( ',' nativecode )* ( ’,’ optional) ?
 * nativecode ::= path ( ';' path )* // See 1.4.2 ( ';' parameter )+
 * optional ::= ’*’
 */
public void verifyNative() {
	String nc = get(Constants.BUNDLE_NATIVECODE);
	doNative(nc);
}

public void doNative(String nc) {
	if (nc != null) {
		QuotedTokenizer qt = new QuotedTokenizer(nc, ",;=", false);
		char del;
		do {
			do {
				String name = qt.nextToken();
				if (name == null) {
					error("Can not parse name from bundle native code header: " + nc);
					return;
				}
				del = qt.getSeparator();
				if (del == ';') {
					if (dot != null && !dot.exists(name)) {
						error("Native library not found in JAR: " + name);
					}
				} else {
					String value = null;
					if (del == '=')
						value = qt.nextToken();

					String key = name.toLowerCase();
					if (key.equals("osname")) {
						// ...
					} else if (key.equals("osversion")) {
						// verify version range
						verify(value, VERSIONRANGE);
					} else if (key.equals("language")) {
						verify(value, ISO639);
					} else if (key.equals("processor")) {
						// verify(value, PROCESSORS);
					} else if (key.equals("selection-filter")) {
						// verify syntax filter
						verifyFilter(value);
					} else if (name.equals("*") && value == null) {
						// Wildcard must be at end.
						if (qt.nextToken() != null)
							error("Bundle-Native code header may only END in wildcard: nc");
					} else {
						warning("Unknown attribute in native code: " + name + "=" + value);
					}
					del = qt.getSeparator();
				}
			} while (del == ';');
		} while (del == ',');
	}
}

public boolean verifyFilter(String value) {
	String s = validateFilter(value);
	if (s == null)
		return true;

	error(s);
	return false;
}

public static String validateFilter(String value) {
	try {
		verifyFilter(value, 0);
		return null;
	}
	catch (Exception e) {
		return "Not a valid filter: " + value + e.getMessage();
	}
}