001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.util; 029 030/** 031 * @since 4.3 032 */ 033public final class TextUtils { 034 035 /** 036 * Returns true if the parameter is null or of zero length 037 */ 038 public static boolean isEmpty(final CharSequence s) { 039 if (s == null) { 040 return true; 041 } 042 return s.length() == 0; 043 } 044 045 /** 046 * Returns true if the parameter is null or contains only whitespace 047 */ 048 public static boolean isBlank(final CharSequence s) { 049 if (s == null) { 050 return true; 051 } 052 for (int i = 0; i < s.length(); i++) { 053 if (!Character.isWhitespace(s.charAt(i))) { 054 return false; 055 } 056 } 057 return true; 058 } 059 060 /** 061 * @since 4.4 062 */ 063 public static boolean containsBlanks(final CharSequence s) { 064 if (s == null) { 065 return false; 066 } 067 for (int i = 0; i < s.length(); i++) { 068 if (Character.isWhitespace(s.charAt(i))) { 069 return true; 070 } 071 } 072 return false; 073 } 074 075}