DesktopApi.java

package de.urszeidler.shr5.ecp.util;

import java.awt.Desktop;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;

/**
 * 
 * @author MightyPork
 * from http://stackoverflow.com/questions/18004150/desktop-api-is-not-supported-on-the-current-platform
 * 
 */
public class DesktopApi {

    public static boolean browse(URI uri) {

        if (openSystemSpecific(uri.toString())) return true;

        if (browseDESKTOP(uri)) return true;

        return false;
    }


    public static boolean open(File file) {

        if (openSystemSpecific(file.getPath())) return true;

        if (openDESKTOP(file)) return true;

        return false;
    }


    public static boolean edit(File file) {

        // you can try something like
        // runCommand("gimp", "%s", file.getPath())
        // based on user preferences.

        if (openSystemSpecific(file.getPath())) return true;

        if (editDESKTOP(file)) return true;

        return false;
    }


    private static boolean openSystemSpecific(String what) {

        EnumOS os = getOs();

        if (os.isLinux()) {
            if (runCommand("kde-open", "%s", what)) return true;
            if (runCommand("gnome-open", "%s", what)) return true;
            if (runCommand("xdg-open", "%s", what)) return true;
        }

        if (os.isMac()) {
            if (runCommand("open", "%s", what)) return true;
        }

        if (os.isWindows()) {
            if (runCommand("explorer", "%s", what)) return true;
        }

        return false;
    }


    private static boolean browseDESKTOP(URI uri) {
        try {
            if (!Desktop.isDesktopSupported()) {
                return false;
            }

            if (!Desktop.getDesktop().isSupported(Desktop.Action.BROWSE)) {
                return false;
            }

            Desktop.getDesktop().browse(uri);

            return true;
        } catch (Throwable t) {
            return false;
        }
    }


    private static boolean openDESKTOP(File file) {
        try {
            if (!Desktop.isDesktopSupported()) {
                return false;
            }

            if (!Desktop.getDesktop().isSupported(Desktop.Action.OPEN)) {
                return false;
            }

            Desktop.getDesktop().open(file);

            return true;
        } catch (Throwable t) {
            return false;
        }
    }


    private static boolean editDESKTOP(File file) {
        try {
            if (!Desktop.isDesktopSupported()) {
                return false;
            }

            if (!Desktop.getDesktop().isSupported(Desktop.Action.EDIT)) {
                return false;
            }

            Desktop.getDesktop().edit(file);

            return true;
        } catch (Throwable t) {
            return false;
        }
    }


    private static boolean runCommand(String command, String args, String file) {

        String[] parts = prepareCommand(command, args, file);

        try {
            Process p = Runtime.getRuntime().exec(parts);
            if (p == null) return false;

            try {
                int retval = p.exitValue();
                if (retval == 0) {
                    return false;
                } else {
                    return false;
                }
            } catch (IllegalThreadStateException itse) {
                return true;
            }
        } catch (IOException e) {
            return false;
        }
    }


    private static String[] prepareCommand(String command, String args, String file) {

        List<String> parts = new ArrayList<String>();
        parts.add(command);

        if (args != null) {
            for (String s : args.split(" ")) {
                s = String.format(s, file); // put in the filename thing

                parts.add(s.trim());
            }
        }

        return parts.toArray(new String[parts.size()]);
    }


    public static enum EnumOS {
        linux, macos, solaris, unknown, windows;

        public boolean isLinux() {

            return this == linux || this == solaris;
        }


        public boolean isMac() {

            return this == macos;
        }


        public boolean isWindows() {

            return this == windows;
        }
    }


    public static EnumOS getOs() {

        String s = System.getProperty("os.name").toLowerCase();

        if (s.contains("win")) {
            return EnumOS.windows;
        }

        if (s.contains("mac")) {
            return EnumOS.macos;
        }

        if (s.contains("solaris")) {
            return EnumOS.solaris;
        }

        if (s.contains("sunos")) {
            return EnumOS.solaris;
        }

        if (s.contains("linux")) {
            return EnumOS.linux;
        }

        if (s.contains("unix")) {
            return EnumOS.linux;
        } else {
            return EnumOS.unknown;
        }
    }
}