FileSystemHelper.java

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package org.gffs.filesystem;
 
import java.io.File;
import java.io.FileNotFoundException;
import java.nio.file.Files;
import java.nio.file.Path;
 
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
 
public class FileSystemHelper
{
  private static Log _logger = LogFactory.getLog(FileSystemHelper.class);
 
  public static boolean pathContainsLink(String path) throws FileNotFoundException
  {
    // replace any backslashes with forward slashes.
    path = path.replaceAll("\\+", "/");
 
    // make sure path is absolute.
    if (!path.startsWith("/")) {
      String msg = "path passed in was not absolute: '" + path + "'";
      _logger.error(msg);
      throw new FileNotFoundException(msg);
    }
 
    // replace any double slashes with single ones.
    path = path.replaceAll("//", "/");
    String[] components = path.split("/");
 
    String currentPath = ""; // never expected to be a link.
    for (String component : components) {
      currentPath = currentPath + "/" + component;
      if (isFileSymLink(new File(currentPath))) {
        return true;
      }
    }
    return false;
 
    /*
     * future: this could be more useful if it returned the position of the link as a component in path, but then we also need to accept a
     * starting point for the link searching so they can find all of them.
     */
  }
 
  public static boolean isFileSymLink(File path)
  {
    Path nioPath = path.toPath();
    return Files.isSymbolicLink(nioPath);
  }
 
  public static String sanitizeFilename(String toClean)
  {
    if (toClean == null)
      return toClean; // can't fix nothing.
    // _logger.debug("before='" + toClean + "'");
 
    String toReturn = toClean.replace('\\', '/');
 
    // future: any other cleanings we should do on the path?
 
    // _logger.debug("after='" + toReturn + "'");
    return toReturn;
  }
 
  static public void main(String[] args)
  {
    String uglyPath = "C:\\Program Files\\GenesisII\\";
    String fixedPath = sanitizeFilename(uglyPath);
    String expectedPath = "C:/Program Files/GenesisII/";
    if (!fixedPath.equals(expectedPath)) {
      System.err.println("FAILURE IN PARSING!  result is not right: '" + fixedPath + "' when it should be '" + expectedPath);
      System.exit(1);
    } else {
      System.err.println("parsing occurred as expected.");
    }
    System.exit(0);
  }
 
}