View Javadoc

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      /**
36       * Returns true if the parameter is null or of zero length
37       */
38      public static boolean isEmpty(final CharSequence s) {
39          if (s == null) {
40              return true;
41          }
42          return s.length() == 0;
43      }
44  
45      /**
46       * Returns true if the parameter is null or contains only whitespace
47       */
48      public static boolean isBlank(final CharSequence s) {
49          if (s == null) {
50              return true;
51          }
52          for (int i = 0; i < s.length(); i++) {
53              if (!Character.isWhitespace(s.charAt(i))) {
54                  return false;
55              }
56          }
57          return true;
58      }
59  
60      /**
61       * @since 4.4
62       */
63      public static boolean containsBlanks(final CharSequence s) {
64          if (s == null) {
65              return false;
66          }
67          for (int i = 0; i < s.length(); i++) {
68              if (Character.isWhitespace(s.charAt(i))) {
69                  return true;
70              }
71          }
72          return false;
73      }
74  
75  }