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/*
 *  Copyright (c) 2018 Uber Technologies, Inc. ([email protected])
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *           http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package com.uber.hoodie.common.util;

/**
 * Simple utility for operations on strings
 */
public class StringUtils {

  /**
   * Joins the elements of the provided array into a single String
   * containing the provided list of elements.
   *
   * No separator is added to the joined String.
   * Null objects or empty strings within the array are represented by
   * empty strings.
   *
   *    * StringUtils.join(null)            = null
   * StringUtils.join([])              = ""
   * StringUtils.join([null])          = ""
   * StringUtils.join(["a", "b", "c"]) = "abc"
   * StringUtils.join([null, "", "a"]) = "a"
   * 
   */
  public static  String join(final String... elements) {
    return join(elements, "");
  }

  public static String join(final String[] array, final String separator) {
    if (array == null) {
      return null;
    }
    return org.apache.hadoop.util.StringUtils.join(separator, array);
  }

}