001// *************************************************************************************************************************** 002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * 003// * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * 004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance * 005// * with the License. You may obtain a copy of the License at * 006// * * 007// * http://www.apache.org/licenses/LICENSE-2.0 * 008// * * 009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an * 010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the * 011// * specific language governing permissions and limitations under the License. * 012// *************************************************************************************************************************** 013package org.apache.juneau.http; 014 015import org.apache.juneau.http.annotation.*; 016 017/** 018 * Represents a parsed <l>Content-Language</l> HTTP response header. 019 * 020 * <p> 021 * The natural language or languages of the intended audience for the enclosed content. 022 * 023 * <h5 class='figure'>Example</h5> 024 * <p class='bcode w800'> 025 * Content-Language: da 026 * </p> 027 * 028 * <h5 class='topic'>RFC2616 Specification</h5> 029 * 030 * The Content-Language entity-header field describes the natural language(s) of the intended audience for the 031 * enclosed entity. 032 * Note that this might not be equivalent to all the languages used within the entity-body. 033 * <p class='bcode w800'> 034 * Content-Language = "Content-Language" ":" 1#language-tag 035 * </p> 036 * 037 * <p> 038 * Language tags are defined in section 3.10. 039 * The primary purpose of Content-Language is to allow a user to identify and differentiate entities according to the 040 * user's own preferred language. 041 * Thus, if the body content is intended only for a Danish-literate audience, the appropriate field is... 042 * <p class='bcode w800'> 043 * Content-Language: da 044 * </p> 045 * 046 * <p> 047 * If no Content-Language is specified, the default is that the content is intended for all language audiences. 048 * This might mean that the sender does not consider it to be specific to any natural language, or that the sender 049 * does not know for which language it is intended. 050 * 051 * <p> 052 * Multiple languages MAY be listed for content that is intended for multiple audiences. 053 * For example, a rendition of the "Treaty of Waitangi," presented simultaneously in the original Maori and English 054 * versions, would call for... 055 * <p class='bcode w800'> 056 * Content-Language: mi, en 057 * </p> 058 * 059 * <p> 060 * However, just because multiple languages are present within an entity does not mean that it is intended for 061 * multiple linguistic audiences. 062 * An example would be a beginner's language primer, such as "A First Lesson in Latin," which is clearly intended to 063 * be used by an English-literate audience. 064 * In this case, the Content-Language would properly only include "en". 065 * 066 * <p> 067 * Content-Language MAY be applied to any media type -- it is not limited to textual documents. 068 * 069 * <ul class='seealso'> 070 * <li class='extlink'>{@doc RFC2616} 071 * </ul> 072 */ 073@Header("Content-Language") 074public final class ContentLanguage extends HeaderStringArray { 075 076 /** 077 * Constructor. 078 * 079 * @param value The value for this header. 080 */ 081 public ContentLanguage(String[] value) { 082 super(value); 083 } 084 085 /** 086 * Returns a parsed <c>Content-Language</c> header. 087 * 088 * @param value The <c>Content-Language</c> header string. 089 * @return The parsed <c>Content-Language</c> header, or <jk>null</jk> if the string was null. 090 */ 091 public static ContentLanguage forString(String value) { 092 if (value == null) 093 return null; 094 return new ContentLanguage(value); 095 } 096 097 private ContentLanguage(String value) { 098 super(value); 099 } 100}