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 }