source: release-kits/wirk3/bin/launch4j/src/net/sf/launch4j/Util.java@ 15023

/*
    Launch4j (http://launch4j.sourceforge.net/)
    Cross-platform Java application wrapper for creating Windows native executables.

    Copyright (C) 2004, 2006 Grzegorz Kowal

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/*
 * Created on 2005-04-24
 */
package net.sf.launch4j;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;

/**
 * @author Copyright (C) 2005 Grzegorz Kowal
 */
public class Util {
    public static final boolean WINDOWS_OS = System.getProperty("os.name")
            .toLowerCase().startsWith("windows");

    private Util() {}

    public static File createTempFile(String suffix) throws IOException {
        String tmpdir = System.getProperty("launch4j.tmpdir");
        if (tmpdir != null) {
            if (tmpdir.indexOf(' ') != -1) {
                throw new IOException(Messages.getString("Util.tmpdir"));
            }
            return File.createTempFile("launch4j", suffix, new File(tmpdir));
        } else {
            return File.createTempFile("launch4j", suffix);
        }
    }

    /**
     * Returns the base directory of a jar file or null if the class is a standalone file. 
     * @return System specific path
     * 
     * Based on a patch submitted by Josh Elsasser
     */
    public static File getJarBasedir() {
        String url = Util.class.getClassLoader()
                .getResource(Util.class.getName().replace('.', '/') + ".class")
                .getFile()
                .replaceAll("%20", " ");
        if (url.startsWith("file:")) {
            String jar = url.substring(5, url.lastIndexOf('!'));
            int x = jar.lastIndexOf('/');
            if (x == -1) {
                x = jar.lastIndexOf('\\');  
            }
            String basedir = jar.substring(0, x + 1);
            return new File(basedir);
        } else {
            return new File(".");
        }
    }

    public static File getAbsoluteFile(File basepath, File f) {
        return f.isAbsolute() ? f : new File(basepath, f.getPath());
    }

    public static String getExtension(File f) {
        String name = f.getName();
        int x = name.lastIndexOf('.');
        if (x != -1) {
            return name.substring(x);
        } else {
            return "";
        }
    }

    public static void exec(String cmd, Log log) throws ExecException {
        BufferedReader is = null;
        try {
            if (WINDOWS_OS) {
                cmd = cmd.replaceAll("/", "\\\\");
            }
            Process p = Runtime.getRuntime().exec(cmd);
            is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
            String line;
            while ((line = is.readLine()) != null) {
                log.append(line);
            }
            is.close();
            p.waitFor();
            if (p.exitValue() != 0) {
                String msg = Messages.getString("Util.exec.failed")
                        + "(" + p.exitValue() + "): " + cmd;
                log.append(msg);
                throw new ExecException(msg);
            }
        } catch (IOException e) {
            close(is);
            throw new ExecException(e);
        } catch (InterruptedException e) {
            close(is);
            throw new ExecException(e);
        }
    }

    public static void close(final InputStream o) {
        if (o != null) {
            try {
                o.close();
            } catch (IOException e) {
                System.err.println(e); // XXX log
            }
        }
    }

    public static void close(final OutputStream o) {
        if (o != null) {
            try {
                o.close();
            } catch (IOException e) {
                System.err.println(e); // XXX log
            }
        }
    }

    public static void close(final Reader o) {
        if (o != null) {
            try {
                o.close();
            } catch (IOException e) {
                System.err.println(e); // XXX log
            }
        }
    }

    public static void close(final Writer o) {
        if (o != null) {
            try {
                o.close();
            } catch (IOException e) {
                System.err.println(e); // XXX log
            }
        }
    }

    public static boolean delete(File f) {
        return (f != null) ? f.delete() : false;
    }
}