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}