Example usage for org.apache.commons.io FilenameUtils separatorsToWindows

Introduction

In this page you can find the example usage for org.apache.commons.io FilenameUtils separatorsToWindows.

Prototype

public static String separatorsToWindows(String path) 

Source Link

Document

Converts all separators to the Windows separator of backslash.

Usage

From source file:net.sf.firemox.xml.magic.Oracle2XmlNoRules.java

/**
 * <ul>//from   ww  w  . ja va2  s  . c  o m
 * Argument are (in this order :
 * <li>Oracle source file
 * <li>destination directory
 * </ul>
 * 
 * @param args
 */
public static void main(String... args) {
    options = new Options();
    final CmdLineParser parser = new CmdLineParser(options);
    try {
        parser.parseArgument(args);
    } catch (CmdLineException e) {
        // Display help
        if (!options.isHelp()) {
            System.out.println("Wrong parameters : " + e.getMessage());
        } else {
            System.out.println("Usage");
        }
        parser.setUsageWidth(100);
        parser.printUsage(System.out);
        System.exit(-1);
        return;
    }

    if (options.isVersion()) {
        // Display version
        System.out.println("Version is " + IdConst.VERSION);
        System.exit(-1);
        return;
    }

    if (options.isHelp()) {
        // Display help
        System.out.println("Usage");
        parser.setUsageWidth(100);
        parser.printUsage(System.out);
        System.exit(-1);
        return;
    }

    // The oracle source file
    final String oracle = options.getOracleFile();

    // the directory destination end with the file separator
    String destination = FilenameUtils.separatorsToWindows(options.getDestination());
    if (!destination.endsWith("/")) {
        destination += "/";
    }

    // Create the destination directories
    try {
        new File(destination).mkdirs();
    } catch (Exception e) {
        // Ignore this error and continue
    }
    new Oracle2XmlNoRules().serialize(MToolKit.getFile(oracle), MToolKit.getFile(destination),
            MToolKit.getFile("tbs/norules-mtg/recycled/"));
}

---

From source file:com.badlogic.gdx.box2deditor.utils.FileUtils.java

/**
 * Get the relative path from one file to another, specifying the directory separator.
 * If one of the provided resources does not exist, it is assumed to be a file unless it ends with '/' or
 * '\'./*from  w ww .  j av  a 2 s.c  o  m*/
 *
 * @param target targetPath is calculated to this file
 * @param base basePath is calculated from this file
 * @param separator directory separator. The platform default is not assumed so that we can test Unix behaviour when running on Windows (for example)
 * @return
 */
public static String getRelativePath(String targetPath, String basePath, String pathSeparator) {
    // Normalize the paths
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);

    // Undo the changes to the separators made by normalization
    if (pathSeparator.equals("/")) {
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);

    } else if (pathSeparator.equals("\\")) {
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);

    } else {
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));

    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuilder common = new StringBuilder();

    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].equals(base[commonIndex])) {
        common.append(target[commonIndex]).append(pathSeparator);
        commonIndex++;
    }

    if (commonIndex == 0) {
        // No single common path element. This most
        // likely indicates differing drive letters, like C: and D:.
        // These paths cannot be relativized.
        throw new NoCommonPathFoundException("No common path element found for '" + normalizedTargetPath
                + "' and '" + normalizedBasePath + "'");
    }

    // The number of directories we have to backtrack depends on whether the base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    //
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but it's the best I can do
    boolean baseIsFile = true;

    File baseResource = new File(normalizedBasePath);

    if (baseResource.exists()) {
        baseIsFile = baseResource.isFile();

    } else if (basePath.endsWith(pathSeparator)) {
        baseIsFile = false;
    }

    StringBuilder relative = new StringBuilder();

    if (base.length != commonIndex) {
        int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;

        for (int i = 0; i < numDirsUp; i++) {
            relative.append("..").append(pathSeparator);
        }
    }
    relative.append(normalizedTargetPath.substring(common.length()));
    return relative.toString();
}

---

From source file:aurelienribon.utils.io.FilenameHelper.java

/**
 * Gets the relative path from one file to another.
 *//*from   w ww .ja  v a  2s  .co  m*/
public static String getRelativePath(String targetPath, String basePath) {
    if (basePath == null || basePath.equals(""))
        return targetPath;
    if (targetPath == null || targetPath.equals(""))
        return "";

    String pathSeparator = File.separator;

    // Normalize the paths
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);

    if (basePath.equals(targetPath))
        return "";

    // Undo the changes to the separators made by normalization
    if (pathSeparator.equals("/")) {
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);

    } else if (pathSeparator.equals("\\")) {
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);

    } else {
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));

    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuilder common = new StringBuilder();

    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].equals(base[commonIndex])) {
        common.append(target[commonIndex]).append(pathSeparator);
        commonIndex++;
    }

    if (commonIndex == 0) {
        return targetPath;
    }

    // The number of directories we have to backtrack depends on whether the base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    //
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but it's the best I can do
    boolean baseIsFile = true;

    File baseResource = new File(normalizedBasePath);

    if (baseResource.exists()) {
        baseIsFile = baseResource.isFile();

    } else if (basePath.endsWith(pathSeparator)) {
        baseIsFile = false;
    }

    StringBuilder relative = new StringBuilder();

    if (base.length != commonIndex) {
        int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;

        for (int i = 0; i < numDirsUp; i++) {
            relative.append("..").append(pathSeparator);
        }
    }
    relative.append(normalizedTargetPath.substring(common.length()));
    return relative.toString();
}

---

From source file:ch.unibas.fittingwizard.infrastructure.base.ResourceUtils.java

/**
 * Get the relative path from one file to another, specifying the directory separator.
 * If one of the provided resources does not exist, it is assumed to be a file unless it ends with '/' or
 * '\'./*w  ww  . j  av a 2s . co m*/
 *
 * @param targetPath targetPath is calculated to this file
 * @param basePath basePath is calculated from this file
 * @param pathSeparator directory separator. The platform default is not assumed so that we can test Unix behaviour when running on Windows (for example)
 * @return
 */
public static String getRelativePath(String targetPath, String basePath, String pathSeparator) {

    // Normalize the paths
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);

    // Undo the changes to the separators made by normalization
    if (pathSeparator.equals("/")) {
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);

    } else if (pathSeparator.equals("\\")) {
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);

    } else {
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));

    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuffer common = new StringBuffer();

    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].equals(base[commonIndex])) {
        common.append(target[commonIndex] + pathSeparator);
        commonIndex++;
    }

    if (commonIndex == 0) {
        // No single common path element. This most
        // likely indicates differing drive letters, like C: and D:.
        // These paths cannot be relativized.
        throw new PathResolutionException("No common path element found for '" + normalizedTargetPath
                + "' and '" + normalizedBasePath + "'");
    }

    // The number of directories we have to backtrack depends on whether the base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    //
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but it's the best I can do
    boolean baseIsFile = true;

    File baseResource = new File(normalizedBasePath);

    if (baseResource.exists()) {
        baseIsFile = baseResource.isFile();

    } else if (basePath.endsWith(pathSeparator)) {
        baseIsFile = false;
    }

    StringBuffer relative = new StringBuffer();

    if (base.length != commonIndex) {
        int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;

        for (int i = 0; i < numDirsUp; i++) {
            relative.append(".." + pathSeparator);
        }
    }
    relative.append(normalizedTargetPath.substring(common.length()));
    return relative.toString();
}

---

From source file:com.jaeksoft.searchlib.util.FileUtils.java

public final static String unixToSystemPath(String filePath) {
    if ("\\".equals(File.separator))
        filePath = FilenameUtils.separatorsToWindows(filePath);
    return filePath;
}

---

From source file:gov.nih.nci.cbiit.cmts.util.ResourceUtils.java

/**
 * Get the relative path from one file to another, specifying the directory separator.
* If one of the provided resources does not exist, it is assumed to be a file unless it ends with '/' or
* '\'./*from w w w . ja  v a 2  s . c  o m*/
*
 * @param targetPath is calculated to this file
* @param basePath is calculated from this file
* @param pathSeparator directory separator. The platform default is not assumed so that we can test Unix behaviour when running on Windows (for example)
* @return target relative path from the base
*/

public static String getRelativePath(String targetPath, String basePath, String pathSeparator) {
    if (targetPath.toLowerCase().startsWith("file:/")) {
        targetPath = targetPath.substring(6);
        while (targetPath.startsWith("/"))
            targetPath = targetPath.substring(1);
    }
    if (basePath.toLowerCase().startsWith("file:/")) {
        basePath = basePath.substring(6);
        while (basePath.startsWith("/"))
            basePath = basePath.substring(1);
    }

    String tempS = basePath;
    while (true) {
        File baseF = new File(tempS);
        if ((baseF.exists()) && (baseF.isFile())) {
            basePath = baseF.getAbsolutePath();
            break;
        }
        if (!pathSeparator.equals("/"))
            break;
        if (tempS.startsWith("/"))
            break;
        tempS = "/" + tempS;
    }
    tempS = targetPath;
    while (true) {
        File targetF = new File(tempS);
        if ((targetF.exists()) && (targetF.isFile())) {
            targetPath = targetF.getAbsolutePath();
            break;
        }
        if (!pathSeparator.equals("/"))
            break;
        if (tempS.startsWith("/"))
            break;
        tempS = "/" + tempS;
    }

    // Normalize the paths
    //System.out.println("ResourceUtils.getRelativePath()..target("+pathSeparator+"):"+targetPath);
    //System.out.println("ResourceUtils.getRelativePath()..base("+pathSeparator+"):"+basePath);
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);
    // Undo the changes to the separators made by normalization

    if (pathSeparator.equals("/")) {
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);
    } else if (pathSeparator.equals("\\")) {
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);
    } else {
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    //System.out.println("ResourceUtils.getRelativePath()..normalizedTarget("+pathSeparator+"):"+normalizedTargetPath);
    //System.out.println("ResourceUtils.getRelativePath()..normalizedBase("+pathSeparator+"):"+normalizedBasePath);

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));
    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuffer common = new StringBuffer();
    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].trim().equals(base[commonIndex].trim())) {
        common.append(target[commonIndex].trim() + pathSeparator);
        commonIndex++;
    }
    if (commonIndex == 0) {
        // No single common path element. This most
        // likely indicates differing drive letters, like C: and D:.
        // These paths cannot be relativized.
        File ff = new File(targetPath);
        if ((ff.exists()) && (ff.isFile()))
            return ff.getAbsolutePath();
        else
            throw new IllegalArgumentException("No common path element found for '" + normalizedTargetPath
                    + "' and '" + normalizedBasePath + "'");
    }
    // The number of directories we have to backtrack depends on whether the base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    //
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but it's the best I can do
    boolean baseIsFile = true;
    File baseResource = new File(normalizedBasePath);
    if (baseResource.exists()) {
        baseIsFile = baseResource.isFile();
    } else if (basePath.endsWith(pathSeparator)) {
        baseIsFile = false;
    }
    StringBuffer relative = new StringBuffer();
    if (base.length != commonIndex) {
        int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;
        for (int i = 0; i < numDirsUp; i++) {
            relative.append(".." + pathSeparator);
        }
    }
    relative.append(normalizedTargetPath.substring(common.length()));
    //System.out.println("ResourceUtils.getRelativePath()..relativeTarget:"+relative.toString());
    return relative.toString();
}

---

From source file:me.childintime.childintime.util.file.PathUtils.java

/**
 * Get the relative path from one file to another, specifying the directory separator.
 * If one of the provided resources does not exist, it is assumed to be a file unless it ends with '/' or '\'.
 *
 * @param targetPath targetPath is calculated to this file
 * @param basePath basePath is calculated from this file
 * @param pathSeparator directory separator. The platform default is not assumed so that we can test Unix behaviour when running on Windows (for example)
 *
 * @return The relative path./*from   ww  w .j a v a2 s. c  o m*/
 */
public static String getRelativePath(String targetPath, String basePath, String pathSeparator) {
    // Normalize the paths
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);

    // Undo the changes to the separators made by normalization
    switch (pathSeparator) {
    case "/":
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);
        break;

    case "\\":
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);
        break;

    default:
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));

    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuilder common = new StringBuilder();

    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].equals(base[commonIndex])) {
        common.append(target[commonIndex]).append(pathSeparator);
        commonIndex++;
    }

    if (commonIndex == 0)
        // No single common path element. This most
        // likely indicates differing drive letters, like C: and D:.
        // These paths cannot be relativized.
        throw new PathResolutionException("No common path element found for '" + normalizedTargetPath
                + "' and '" + normalizedBasePath + "'");

    // The number of directories we have to backtrack depends on whether the base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    // 
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but it's the best I can do
    boolean baseIsFile = true;

    File baseResource = new File(normalizedBasePath);

    if (baseResource.exists())
        baseIsFile = baseResource.isFile();
    else if (basePath.endsWith(pathSeparator))
        baseIsFile = false;

    StringBuilder relative = new StringBuilder();

    if (base.length != commonIndex) {
        int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;

        for (int i = 0; i < numDirsUp; i++)
            relative.append("..").append(pathSeparator);
    }

    relative.append(normalizedTargetPath.substring(common.length()));
    return relative.toString();
}

---

From source file:info.schnatterer.songbirdDbTools.Utils.ResourceUtils.java

/**
 * Get the relative path from one file to another, specifying the directory separator. If one of the provided
 * resources does not exist, it is assumed to be a file unless it ends with '/' or '\'.
 * /*from   w  ww.  jav a 2s  .c  om*/
 * @param targetPath
 *            targetPath is calculated to this file
 * @param basePath
 *            basePath is calculated from this file
 * @param pathSeparator
 *            directory separator. The platform default is not assumed so that we can test Unix behavior when
 *            running on Windows (for example)
 * @return <code>targetPath</code> relativized to <code>basePath</code>
 * 
 * @author http://stackoverflow.com/questions/204784/how-to-construct-a-relative
 *         -path-in-java-from-two-absolute-paths-or-urls
 */
public static String getRelativePath(final String basePath, final String targetPath,
        final String pathSeparator) {

    // Normalize the paths
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);

    // Undo the changes to the separators made by normalization
    if (pathSeparator.equals("/")) {
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);

    } else if (pathSeparator.equals("\\")) {
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);

    } else {
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));

    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuffer common = new StringBuffer();

    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].equals(base[commonIndex])) {
        common.append(target[commonIndex] + pathSeparator);
        commonIndex++;
    }

    if (commonIndex == 0) {
        // No single common path element. This most
        // likely indicates differing drive letters, like C: and D:.
        // These paths cannot be relativized.
        throw new PathResolutionException("No common path element found for '" + normalizedTargetPath
                + "' and '" + normalizedBasePath + "'");
    }

    // The number of directories we have to backtrack depends on whether the
    // base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    //
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a
    // file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but
    // it's the best I can do
    boolean baseIsFile = true;

    File baseResource = new File(normalizedBasePath);

    if (baseResource.exists()) {
        baseIsFile = baseResource.isFile();

    } else if (basePath.endsWith(pathSeparator)) {
        baseIsFile = false;
    }

    StringBuffer relative = new StringBuffer();

    if (base.length != commonIndex) {

        int numDirsUp;
        if (baseIsFile) {
            numDirsUp = base.length - commonIndex - 1;
        } else {
            numDirsUp = base.length - commonIndex;
        }

        for (int i = 0; i < numDirsUp; i++) {
            relative.append(".." + pathSeparator);
        }
    }
    relative.append(normalizedTargetPath.substring(common.length()));
    return relative.toString();
}

---

From source file:hudson.plugins.project_inheritance.util.PathMapping.java

/**
 * Get the relative path from one file to another, specifying the directory separator. 
 * If one of the provided resources does not exist, it is assumed to be a file unless it ends with '/' or
 * '\'.//from  w w  w  .j a va2s .com
 * 
 * @param targetPath targetPath is calculated to this file
 * @param basePath basePath is calculated from this file
 * @param pathSeparator directory separator. The platform default is not assumed so that we can test Unix behaviour when running on Windows (for example)
 * @return
 */
public static String getRelativePath(String targetPath, String basePath, String pathSeparator) {
    // Normalize the paths
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);

    // Undo the changes to the separators made by normalization
    if (pathSeparator.equals("/")) {
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);

    } else if (pathSeparator.equals("\\")) {
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);

    } else {
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));

    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuilder common = new StringBuilder();

    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].equals(base[commonIndex])) {
        common.append(target[commonIndex] + pathSeparator);
        commonIndex++;
    }

    if (commonIndex == 0) {
        // No single common path element. This most
        // likely indicates differing drive letters, like C: and D:.
        // These paths cannot be relativized.
        throw new PathResolutionException("No common path element found for '" + normalizedTargetPath
                + "' and '" + normalizedBasePath + "'");
    }

    // The number of directories we have to backtrack depends on whether the base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    // 
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but it's the best I can do
    boolean baseIsFile = true;

    File baseResource = new File(normalizedBasePath);

    if (baseResource.exists()) {
        baseIsFile = baseResource.isFile();

    } else if (basePath.endsWith(pathSeparator)) {
        baseIsFile = false;
    }

    StringBuilder relative = new StringBuilder();

    if (base.length != commonIndex) {
        int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;

        for (int i = 0; i < numDirsUp; i++) {
            relative.append(".." + pathSeparator);
        }
    }
    relative.append(normalizedTargetPath.substring(common.length()));
    return relative.toString();
}

---

From source file:com.sap.prd.mobile.ios.mios.FileUtils.java

/**
 * Get the relative path from one file to another, specifying the directory separator. If one of
 * the provided resources does not exist, it is assumed to be a file unless it ends with '/' or
 * '\'./*  ww w  . j a va 2 s .c o m*/
 * 
 * Copied from http://stackoverflow.com/a/3054692/933106.
 * 
 * @param target
 *          targetPath is calculated to this file
 * @param base
 *          basePath is calculated from this file
 * @param separator
 *          directory separator. The platform default is not assumed so that we can test Unix
 *          behaviour when running on Windows (for example)
 * @return
 */
public static String getRelativePath(String targetPath, String basePath, String pathSeparator) {

    // Normalize the paths
    String normalizedTargetPath = FilenameUtils.normalizeNoEndSeparator(targetPath);
    String normalizedBasePath = FilenameUtils.normalizeNoEndSeparator(basePath);

    // Undo the changes to the separators made by normalization
    if (pathSeparator.equals("/")) {
        normalizedTargetPath = FilenameUtils.separatorsToUnix(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToUnix(normalizedBasePath);

    } else if (pathSeparator.equals("\\")) {
        normalizedTargetPath = FilenameUtils.separatorsToWindows(normalizedTargetPath);
        normalizedBasePath = FilenameUtils.separatorsToWindows(normalizedBasePath);

    } else {
        throw new IllegalArgumentException("Unrecognised dir separator '" + pathSeparator + "'");
    }

    String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
    String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));

    // First get all the common elements. Store them as a string,
    // and also count how many of them there are.
    StringBuilder common = new StringBuilder();

    int commonIndex = 0;
    while (commonIndex < target.length && commonIndex < base.length
            && target[commonIndex].equals(base[commonIndex])) {
        common.append(target[commonIndex] + pathSeparator);
        commonIndex++;
    }

    if (commonIndex == 0) {
        // No single common path element. This most
        // likely indicates differing drive letters, like C: and D:.
        // These paths cannot be relativized.
        throw new PathResolutionException("No common path element found for '" + normalizedTargetPath
                + "' and '" + normalizedBasePath + "'");
    }

    // The number of directories we have to backtrack depends on whether the base is a file or a dir
    // For example, the relative path from
    //
    // /foo/bar/baz/gg/ff to /foo/bar/baz
    // 
    // ".." if ff is a file
    // "../.." if ff is a directory
    //
    // The following is a heuristic to figure out if the base refers to a file or dir. It's not perfect, because
    // the resource referred to by this path may not actually exist, but it's the best I can do
    boolean baseIsFile = true;

    File baseResource = new File(normalizedBasePath);

    if (baseResource.exists()) {
        baseIsFile = baseResource.isFile();

    } else if (basePath.endsWith(pathSeparator)) {
        baseIsFile = false;
    }

    StringBuilder relative = new StringBuilder();

    if (base.length != commonIndex) {
        int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;

        for (int i = 0; i < numDirsUp; i++) {
            relative.append(".." + pathSeparator);
        }
    }
    relative.append(normalizedTargetPath.substring(common.length()));
    return relative.toString();
}

---

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