Class FileUtil

src/main/java/com/oltpbenchmark/util/FileUtil.java:29–120

@author pavlo

 * @author pavlo
 */
public abstract class FileUtil {

  private static final Pattern EXT_SPLIT = Pattern.compile("\\.");

  /**
   * Join path components
   *
   * @param args
   * @return
   */
  public static String joinPath(String... args) {
    StringBuilder result = new StringBuilder();
    boolean first = true;
    for (String a : args) {
      if (a != null && a.length() > 0) {
        if (!first) {
          result.append("/");
        }
        result.append(a);
        first = false;
      }
    }
    return result.toString();
  }

  /**
   * Given a basename for a file, find the next possible filename if this file already exists. For
   * example, if the file test.res already exists, create a file called, test.1.res
   *
   * @param basename
   * @return
   */
  public static String getNextFilename(String basename) {

    if (!exists(basename)) return basename;

    File f = new File(basename);
    if (f != null && f.isFile()) {
      String parts[] = EXT_SPLIT.split(basename);

      // Check how many files already exist
      int counter = 1;
      String nextName = parts[0] + "." + counter + "." + parts[1];
      while (exists(nextName)) {
        ++counter;
        nextName = parts[0] + "." + counter + "." + parts[1];
      }
      return nextName;
    }

    // Should we throw instead??
    return null;
  }

  public static boolean exists(String path) {
    return (new File(path).exists());
  }