StringUtil.java

/***************************************************************************
 * Copyright (c) 2012-2013 VMware, Inc. All Rights Reserved.
 * 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.vmware.aurora.util;

/**
 * String utilities.
 */
public class StringUtil {
   /**
    * Tests whether the given string is null or empty.
    */
   public static boolean isNullOrWhitespace(String str) {
      return str == null || str.trim().length() == 0;
   }

   /**
    * @return null or trimmed non-empty string
    */
   public static String trimNonEmpty(String s) {
      if (s == null) {
         return null;
      }
      String s1 = s.trim();
      if (s1.isEmpty()) {
         return null;
      } else {
         return s1;
      }
   }
}