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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.http.util;
29  
30  /**
31   * @since 4.3
32   */
33  public final class TextUtils {
34  
35      public static boolean isEmpty(final CharSequence s) {
36          if (s == null) {
37              return true;
38          }
39          return s.length() == 0;
40      }
41  
42      public static boolean isBlank(final CharSequence s) {
43          if (s == null) {
44              return true;
45          }
46          for (int i = 0; i < s.length(); i++) {
47              if (!Character.isWhitespace(s.charAt(i))) {
48                  return false;
49              }
50          }
51          return true;
52      }
53  
54      /**
55       * @since 4.4
56       */
57      public static boolean containsBlanks(final CharSequence s) {
58          if (s == null) {
59              return false;
60          }
61          for (int i = 0; i < s.length(); i++) {
62              if (Character.isWhitespace(s.charAt(i))) {
63                  return true;
64              }
65          }
66          return false;
67      }
68  
69  }