Java Path Relative Get getRelativePath(String source, String target)

Description

get Relative Path

License

Open Source License

Declaration

public static String getRelativePath(String source, String target) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2006, 2010 Soyatec (http://www.soyatec.com) and others.       *
 * All rights reserved. This program and the accompanying materials            *
 * are made available under the terms of the Eclipse Public License v1.0       *
 * which accompanies this distribution, and is available at                    *
 * http://www.eclipse.org/legal/epl-v10.html                                   *  
 * Contributors:                                                               *  
 *     Soyatec - initial API and implementation                                * 
 *******************************************************************************/

import java.io.File;

public class Main {
    public static final String BACKWARD_SLASH = "\\";
    public static final String FORWARD_SLASH = "/";
    public static final String RELATIVE_PATH_SIG = "../";

    public static String getRelativePath(String source, String target) {
        if (source == null || target == null) {
            return target;
        }/*from  ww w  . j  a v a  2  s .c  o  m*/
        File sourceFile = new File(source);
        if (!sourceFile.exists()) {
            return target;
        }
        File targetFile = new File(target);
        if (!targetFile.exists()) {
            return target;
        }
        source = switchToForwardSlashes(source);
        target = switchToForwardSlashes(target);
        int index = target.indexOf(FORWARD_SLASH);
        String container = null;
        while (index != -1) {
            container = target.substring(0, index);
            if (!source.startsWith(container + FORWARD_SLASH)) {
                break;
            }
            source = source.substring(index + 1);
            target = target.substring(index + 1);
            index = target.indexOf(FORWARD_SLASH);
        }
        index = source.indexOf(FORWARD_SLASH);
        while (index != -1) {
            target = RELATIVE_PATH_SIG + target;
            source = source.substring(index + 1);
            index = source.indexOf(FORWARD_SLASH);
        }
        return target;
    }

    /**
     * Switch to file path slashes
     */
    public static String switchToForwardSlashes(String path) {
        path = path.replace(File.separatorChar, FORWARD_SLASH.charAt(0));
        path = path.replace(BACKWARD_SLASH.charAt(0), FORWARD_SLASH.charAt(0));
        return path;
    }
}

Related

1. getRelativePath(String from, String to)
2. getRelativePath(String parent, String child)
3. getRelativePath(String path, String base)
4. getRelativePath(String root, String path)
5. getRelativePath(String rootpath, String path)
6. getRelativePath(String target, String base)
7. getRelativePath(String targetPath, String basePath, String pathSeparator)
8. getRelativePath(String targetPath, String basePath, String pathSeparator)
9. getRelativePathOfZipEntry(final File fileToZip, final File base)