source: josm/src/org/openstreetmap/josm/gui/MainApplet.java@ 104

package org.openstreetmap.josm.gui;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.GridBagLayout;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;

import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.ServerSidePreferences;
import org.openstreetmap.josm.tools.GBC;

public class MainApplet extends JApplet {

        private final class MainCaller extends Main {
                private MainCaller() {
                        setContentPane(contentPane);
                        setJMenuBar(mainMenu);
                        setBounds(bounds);
                }
        }

        private final static String[][] paramInfo = {
                {"username", tr("string"), tr("Name of the user.")},
                {"password", tr("string"), tr("OSM Password.")},
                {"geometry", tr("string"), tr("Size the applet to the given geometry (format: WIDTHxHEIGHT)")},
                {"download", tr("string;string;..."), tr("Download each. Can be x1,y1,x2,y2 an url containing lat=y&lon=x&zoom=z or a filename")},
                {"downloadgps", tr("string;string;..."), tr("Download each as raw gps. Can be x1,y1,x2,y2 an url containing lat=y&lon=x&zoom=z or a filename")},
                {"selection", tr("string;string;..."), tr("Add each to the initial selection. Can be a google-like search string or an url which returns osm-xml")},
                {"reset-preferences", tr("any"),tr("If specified, reset the configuration instead of reading it.")}
        };
        
        private Map<String, Collection<String>> args = new HashMap<String, Collection<String>>(); 

        @Override public String[][] getParameterInfo() {
                return paramInfo;
        }

        @Override public void init() {
                for (String[] s : paramInfo) {
                        Collection<String> p = readParameter(s[0], args.get(s[0]));
                        if (p != null)
                                args.put(s[0], p);
                }
                if (!args.containsKey("geometry") && getParameter("width") != null && getParameter("height") != null) {
                        args.put("geometry", Arrays.asList(new String[]{getParameter("width")+"x"+getParameter("height")}));
                }
        }

        @Override public void start() {
                String username = args.containsKey("username") ? args.get("username").iterator().next() : null;
                String password = args.containsKey("password") ? args.get("password").iterator().next() : null;
                if (username == null || password == null) {
                        JPanel p = new JPanel(new GridBagLayout());
                        p.add(new JLabel(tr("Username")), GBC.std().insets(0,0,20,0));
                        JTextField user = new JTextField(username == null ? "" : username);
                        p.add(user, GBC.eol().fill(GBC.HORIZONTAL));
                        p.add(new JLabel(tr("Password")), GBC.std().insets(0,0,20,0));
                        JPasswordField pass = new JPasswordField(password == null ? "" : password);
                        p.add(pass, GBC.eol().fill(GBC.HORIZONTAL));
                        JOptionPane.showMessageDialog(null, p);
                        username = user.getText();
                        password = new String(pass.getPassword());
                        args.put("password", Arrays.asList(new String[]{password}));
                }

                Main.pref = new ServerSidePreferences(getCodeBase(), username);
                
                Main.preConstructorInit(args);
                Main.parent = this;
                new MainCaller().postConstructorProcessCmdLine(args);
    }

        private Collection<String> readParameter(String s, Collection<String> v) {
                String param = getParameter(s);
                if (param != null) {
                        if (v == null)
                                v = new LinkedList<String>();
                        v.addAll(Arrays.asList(param.split(";")));
                }
                return v;
        }
}