Java ClassLoader Load getBaseDir()

Description

Gets the application base directory.

License

Open Source License

Return

the base directory

Declaration

public static URL getBaseDir() 

Method Source Code

//package com.java2s;
/*/*from  w w w.jav  a2s  . c om*/
 * SCUBA smart card framework.
 *
 * Copyright (C) 2009 - 2012  The SCUBA team.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 * $Id: $
 */

import java.io.File;

import java.net.URL;

public class Main {
    /**
     * Gets the application base directory.
     * 
     * @return the base directory
     */
    public static URL getBaseDir() {
        try {
            Class<?> c = (new Object() {
                public String toString() {
                    return super.toString();
                }
            }).getClass();

            /* We're using the classloader to determine the base URL. */
            ClassLoader cl = c.getClassLoader();
            URL url = cl.getResource(".");

            if (url == null) {
                return getBaseDir(c);
            }

            String protocol = url.getProtocol().toLowerCase();
            String host = url.getHost().toLowerCase();
            String basePathString = url.getFile();

            if (basePathString.endsWith("/bin") || basePathString.endsWith("/bin/")
                    || basePathString.endsWith("/build") || basePathString.endsWith("/build/")) {
                basePathString = (new File(basePathString)).getParent();
            }
            return new URL(protocol, host, basePathString);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * Gets the base directory where class <code>c</code> resides.
     *
     * @param c a class
     * 
     * @return the base directory
     */
    public static URL getBaseDir(Class<?> c) {
        try {
            String className = c.getCanonicalName();
            if (className == null) {
                className = c.getName();
            }
            String pathToClass = "/" + className.replace(".", "/") + ".class";
            URL url = c.getResource(pathToClass);

            String protocol = url.getProtocol().toLowerCase();
            String host = url.getHost().toLowerCase();
            String dirString = url.getFile();
            int classNameIndex = dirString.indexOf(pathToClass);
            String basePathString = dirString.substring(0, classNameIndex);
            if (basePathString.endsWith("/bin") || basePathString.endsWith("/bin/")
                    || basePathString.endsWith("/build") || basePathString.endsWith("/build/")) {
                basePathString = (new File(basePathString)).getParent();
            }
            URL basePathURL = new URL(protocol, host, basePathString);
            return basePathURL;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

Related

1. getAbsoluteBasePath()
2. getAbsolutePath(String file)
3. getAbsolutePathEssenceDesc(String file)
4. getAllArquillianLibs()
5. getAsProperties(final String name)
6. getBytes(File file)
7. getConfigFileInputStream(String configFilePath)
8. getContentFromFile(String fileName, Object context)
9. getDirectories(String path)