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 }