001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.mina.http.api; 021 022/** 023 * Type safe enumeration representing HTTP protocol version 024 * 025 * @author The Apache MINA Project (dev@mina.apache.org) 026 */ 027public enum HttpVersion { 028 /** 029 * HTTP 1/1 030 */ 031 HTTP_1_1("HTTP/1.1"), 032 033 /** 034 * HTTP 1/0 035 */ 036 HTTP_1_0("HTTP/1.0"); 037 038 private final String value; 039 040 private HttpVersion(String value) { 041 this.value = value; 042 } 043 044 /** 045 * Returns the {@link HttpVersion} instance from the specified string. 046 * 047 * @param string The String contaoning the HTTP version 048 * @return The version, or <code>null</code> if no version is found 049 */ 050 public static HttpVersion fromString(String string) { 051 if (HTTP_1_1.toString().equalsIgnoreCase(string)) { 052 return HTTP_1_1; 053 } 054 055 if (HTTP_1_0.toString().equalsIgnoreCase(string)) { 056 return HTTP_1_0; 057 } 058 059 return null; 060 } 061 062 /** 063 * @return A String representation of this version 064 */ 065 @Override 066 public String toString() { 067 return value; 068 } 069 070}