How to use

unEscapeString

method

in

org.apache.hadoop.util.StringUtils

/**
 * Unescape commas in the string using the default escape char
 * @param str a string
 * @return an unescaped string
 */
public static String unEscapeString(String str) {
 return unEscapeString(str, ESCAPE_CHAR, COMMA);
}

/**
 * Unescape <code>charToEscape</code> in the string 
 * with the escape char <code>escapeChar</code>
 * 
 * @param str string
 * @param escapeChar escape char
 * @param charToEscape the escaped char
 * @return an unescaped string
 */
public static String unEscapeString(
  String str, char escapeChar, char charToEscape) {
 return unEscapeString(str, escapeChar, new char[] {charToEscape});
}

/**
 * replaces all occurrences of "\," with ","; returns {@code s} if no modifications needed
 */
public static String unEscapeString(String s) {
 return s != null && s.contains("\\,") ? StringUtils.unEscapeString(s) : s;
}

/**
 * Take an encode strings and decode it into an array of strings.
 */
public static String[] decodeArray(String s) {
 if (s == null)
  return null;
 String[] escaped = StringUtils.split(s);
 String[] plain = new String[escaped.length];
 for (int i = 0; i < escaped.length; ++i)
  plain[i] = StringUtils.unEscapeString(escaped[i]);
 return plain;
}

/**
 * Get the list of input {@link Path}s for the map-reduce job.
 *
 * @param conf The configuration of the job
 * @return the list of input {@link Path}s for the map-reduce job.
 */
static Path[] getInputPaths(Configuration conf) throws IOException {
 String dirs = conf.get("mapred.input.dir");
 if (dirs == null) {
  throw new IOException("Configuration mapred.input.dir is not defined.");
 }
 String [] list = StringUtils.split(dirs);
 Path[] result = new Path[list.length];
 for (int i = 0; i < list.length; i++) {
  result[i] = new Path(StringUtils.unEscapeString(list[i]));
 }
 return result;
}

/**
 * When a Pig job is submitted and it uses HCat, WebHCat may be configured to ship hive tar
 * to the target node.  Pig on the target node needs some env vars configured.
 */
private static void handlePigEnvVars(Configuration conf, Map<String, String> env) {
 if(conf.get(PigConstants.HIVE_HOME) != null) {
  env.put(PigConstants.HIVE_HOME, new File(conf.get(PigConstants.HIVE_HOME)).getAbsolutePath());
 }
 if(conf.get(PigConstants.HCAT_HOME) != null) {
  env.put(PigConstants.HCAT_HOME, new File(conf.get(PigConstants.HCAT_HOME)).getAbsolutePath());
 }
 if(conf.get(PigConstants.PIG_OPTS) != null) {
  StringBuilder pigOpts = new StringBuilder();
  for(String prop : StringUtils.split(conf.get(PigConstants.PIG_OPTS))) {
   pigOpts.append("-D").append(StringUtils.unEscapeString(prop)).append(" ");
  }
  env.put(PigConstants.PIG_OPTS, pigOpts.toString());
 }
}

/**
 * Get the list of input {@link Path}s for the map-reduce job.
 *
 * @param conf The configuration of the job
 * @return the list of input {@link Path}s for the map-reduce job.
 */
static Path[] getInputPaths(Configuration conf) throws IOException {
 String dirs = conf.get("mapred.input.dir");
 if (dirs == null) {
  throw new IOException("Configuration mapred.input.dir is not defined.");
 }
 String [] list = StringUtils.split(dirs);
 Path[] result = new Path[list.length];
 for (int i = 0; i < list.length; i++) {
  result[i] = new Path(StringUtils.unEscapeString(list[i]));
 }
 return result;
}

/**
 * Unescape commas in the string using the default escape char
 * @param str a string
 * @return an unescaped string
 */
public static String unEscapeString(String str) {
 return unEscapeString(str, ESCAPE_CHAR, COMMA);
}

/**
 * Unescape commas in the string using the default escape char
 * @param str a string
 * @return an unescaped string
 */
public static String unEscapeString(String str) {
 return unEscapeString(str, ESCAPE_CHAR, COMMA);
}

/**
 * Unescape commas in the string using the default escape char
 * @param str a string
 * @return an unescaped string
 */
public static String unEscapeString(String str) {
 return unEscapeString(str, ESCAPE_CHAR, COMMA);
}

/**
 * Unescape commas in the string using the default escape char
 * @param str a string
 * @return an unescaped string
 */
public static String unEscapeString(String str) {
 return unEscapeString(str, ESCAPE_CHAR, COMMA);
}

/**
 * Unescape commas in the string using the default escape char
 * @param str a string
 * @return an unescaped string
 */
public static String unEscapeString(String str) {
 return unEscapeString(str, ESCAPE_CHAR, COMMA);
}

/**
 * Unescape commas in the string using the default escape char
 * @param str a string
 * @return an unescaped string
 */
public static String unEscapeString(String str) {
 return unEscapeString(str, ESCAPE_CHAR, COMMA);
}

/**
 * Take an encode strings and decode it into an array of strings.
 */
public static String[] decodeArray(String s) {
 if (s == null)
  return null;
 String[] escaped = StringUtils.split(s);
 String[] plain = new String[escaped.length];
 for (int i = 0; i < escaped.length; ++i)
  plain[i] = StringUtils.unEscapeString(escaped[i]);
 return plain;
}

public static Path[] getInputPaths(Configuration conf) {
  String dirs = conf.get(INPUT_DIR, "");
  String[] list = StringUtils.split(dirs);
  Path[] result = new Path[list.length];
  for (int i = 0; i < list.length; i++) {
    result[i] = new Path(StringUtils.unEscapeString(list[i]));
  }
  return result;
}

  public static Path[] getInputPaths(JobContext context) {
    String dirs = context.getConfiguration().get(CommonConstants.CROSS_VALIDATION_DIR, "");
    LOG.info("crossValidation_dir:" + dirs);
    String[] list = StringUtils.split(dirs);
    Path[] result = new Path[list.length];
    for(int i = 0; i < list.length; i++) {
      result[i] = new Path(StringUtils.unEscapeString(list[i]));
    }
    return result;
  }
}

/**
 * Get the list of input {@link Path}s for the map-reduce job.
 */
private static Path[] getInputPaths(String inputs) {
  String[] list = StringUtils.split(inputs);
  Path[] result = new Path[list.length];
  for(int i = 0; i < list.length; i++) {
    result[i] = new Path(StringUtils.unEscapeString(list[i]));
  }
  return result;
}

/**
 * Get the list of input {@link Path}s for the map-reduce job.
 */
private static Path[] getInputPaths(String inputs) {
  String[] list = StringUtils.split(inputs);
  Path[] result = new Path[list.length];
  for(int i = 0; i < list.length; i++) {
    result[i] = new Path(StringUtils.unEscapeString(list[i]));
  }
  return result;
}

/**
 * Get the list of input {@link Path}s for the map-reduce job.
 */
private static Path[] getInputPaths(String inputs) {
  String[] list = StringUtils.split(inputs);
  Path[] result = new Path[list.length];
  for(int i = 0; i < list.length; i++) {
    result[i] = new Path(StringUtils.unEscapeString(list[i]));
  }
  return result;
}

/**
 * Get the list of input {@link Path}s for the map-reduce job.
 */
private static Path[] getInputPaths(String inputs) {
  String[] list = StringUtils.split(inputs);
  Path[] result = new Path[list.length];
  for(int i = 0; i < list.length; i++) {
    result[i] = new Path(StringUtils.unEscapeString(list[i]));
  }
  return result;
}