How to retrieve informations from the Java Control Panel ?

[Oliver Rensen]

Hi,

is it possible to retrieve informations from the Java Control Panel within a Java-program ?

In my source-code I want to know which option is selected in the network settings from the Java Control Panel.

How can I detect programmatically whether direct connection is selected or not?

Kind regards
Oliver

[Oliver Rensen]

I have created my own proprietary solution. It's not nice, but it works.

public class ProxyFinder {

    public interface Search {
        public void visitFile(File current, int depth);
        public void visitDirectory(File current, int depth, File[] contents);
    }

    public interface Element {
        public void accept(Search v, int depth);
    }

    public class DirectoryElement implements Element {
        private File f;
        public DirectoryElement(File f) { this.f = f; }
        public void accept(Search v, int depth) {
            v.visitDirectory(f, depth, f.listFiles());
        }
    }

    public class FileElement implements Element {
        private File f;
        public FileElement(File f) { this.f = f; }
        public void accept(Search v, int depth) {
            v.visitFile(f, depth);
        }
    }

    private File root;

    public ProxyFinder(String root) {
        this.root = new File(root);
    }

    public void traverse(Search searching) {
        topDown(root, searching, 0);
    }

    private void topDown(File root, Search searching, int depth) {
        Element e = root.isFile()
                ? (Element) (new FileElement(root))
                : (Element) (new DirectoryElement(root));

        e.accept(searching, depth);

        if (root.isDirectory()) {
            File[] children = root.listFiles();

            if (children == null) {
                return;
            }

            for (int i = 0; i < children.length; ++i) {
                topDown(children[i], searching, depth + 1);
            }
        }
    }

    public static void main(String args[]) {
        final List<String> files = new ArrayList<String>();
        String startDir = System.getProperty("user.home");
        if (startDir == null || startDir.length() == 0) startDir = "C:\\";

        ProxyFinder d = new ProxyFinder(startDir);
        d.traverse(new ProxyFinder.Search() {
            public void visitFile(File f, int depth) {
                if (f.getName().trim().toLowerCase().startsWith("deployment.properties")) {
                    if (!f.getAbsolutePath().startsWith("C:\\Windows")) {
                        files.add(f.getAbsolutePath());                       
                    }
                }
            }

            public void visitDirectory(File f, int depth, File[] children) { }
        });

        for (String s : files) {
            try {
                FileInputStream file = new FileInputStream(s);
                DataInputStream in = new DataInputStream(file);
                byte[] b = new byte[in.available()];
                in.readFully(b);
                in.close();
                String fileAsString = new String (b, 0, b.length);
                String[] lines = fileAsString.split("\\n");

                String type = "browser settings";
                for (String l : lines) {
                    if (l != null) {
                        String line = l.trim();
                        if (line.equals("deployment.proxy.type=0")) {
                            type = "direct connection";
                        }

                        if (line.equals("deployment.proxy.type=1")) {
                            type = "proxy server";
                        }

                        if (line.equals("deployment.proxy.type=2")) {
                            type = "proxy configuration script";
                        }
                    }
                }

                System.out.println("Java Control Panel: " + type);
            } catch (Exception e) {
                System.out.println("Exception raised: " + e.getMessage());
            }
        }
    }
}