/*
 * Created on 2004-7-17
 */
package org.hziee.netmonitor.util;

import java.util.*;
/**
 * @author alin
 */
public class StringUtil {
  /**
   * <p>Splits the provided text into an array, separator specified.
   * This is an alternative to using StringTokenizer.</p>
   *
   * <p>The separator is not included in the returned String array.
   * Adjacent separators are treated as one separator.</p>
   * 
   * <p>A <code>null</code> input String returns <code>null</code>.</p>
   *
   * <pre>
   * StringUtils.split(null, *)         = null
   * StringUtils.split("", *)           = []
   * StringUtils.split("a.b.c", '.')    = ["a", "b", "c"]
   * StringUtils.split("a..b.c", '.')   = ["a", "b", "c"]
   * StringUtils.split("a:b:c", '.')    = ["a:b:c"]
   * StringUtils.split("a b c", ' ')    = ["a", "b", "c"]
   * </pre>
   * 
   * @param str  the String to parse, may be null
   * @param separatorChar  the character used as the delimiter,
   *  <code>null</code> splits on whitespace
   * @return an array of parsed Strings, <code>null</code> if null String input
   */
  public static String[] split(String str, char separateChar) {
    if (str == null) {
      return null;
    }
    int len = str.length();
    if (len == 0) {
      return new String[0];
    }
    List list = new ArrayList();
    int i = 0, start = 0;
    boolean match = false;
    while (i < len) {
      if (str.charAt == separateChar) {
        if (match) {
          list.add(str.substring(start, i));
          match = false;
        }
        start = ++i;
        continue;
      }
      match = true;
      i++;
    }
    if (match) {
      list.add(str.substring(start, i));
    }
    return (String[]) list.toArray(new String[list.size()]);
  }
}