| // *************************************************************************************************************************** |
| // * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * |
| // * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * |
| // * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance * |
| // * with the License. You may obtain a copy of the License at * |
| // * * |
| // * http://www.apache.org/licenses/LICENSE-2.0 * |
| // * * |
| // * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an * |
| // * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the * |
| // * specific language governing permissions and limitations under the License. * |
| // *************************************************************************************************************************** |
| package org.apache.juneau.http; |
| |
| import org.apache.juneau.http.annotation.*; |
| |
| /** |
| * Represents a parsed <l>Age</l> HTTP response header. |
| * |
| * <p> |
| * The age the object has been in a proxy cache in seconds. |
| * |
| * <h5 class='figure'>Example</h5> |
| * <p class='bcode w800'> |
| * Age: 12 |
| * </p> |
| * |
| * <h5 class='topic'>RFC2616 Specification</h5> |
| * |
| * The Age response-header field conveys the sender's estimate of the amount of time since the response (or its |
| * revalidation) was generated at the origin server. |
| * A cached response is "fresh" if its age does not exceed its freshness lifetime. |
| * Age values are calculated as specified in section 13.2.3. |
| * |
| * <p class='bcode w800'> |
| * Age = "Age" ":" age-value |
| * age-value = delta-seconds |
| * </p> |
| * |
| * <p> |
| * Age values are non-negative decimal integers, representing time in seconds. |
| * |
| * <p> |
| * If a cache receives a value larger than the largest positive integer it can represent, or if any of its age |
| * calculations overflows, it MUST transmit an Age header with a value of 2147483648 (2^31). |
| * |
| * <p> |
| * An HTTP/1.1 server that includes a cache MUST include an Age header field in every response generated from its own |
| * cache. |
| * |
| * <p> |
| * Caches SHOULD use an arithmetic type of at least 31 bits of range. |
| * |
| * <ul class='seealso'> |
| * <li class='extlink'>{@doc RFC2616} |
| * </ul> |
| */ |
| @Header("Age") |
| public final class Age extends HeaderInteger { |
| |
| /** |
| * Constructor. |
| * |
| * @param value The value for this header. |
| */ |
| public Age(Integer value) { |
| super(value); |
| } |
| |
| /** |
| * Returns a parsed <c>Age</c> header. |
| * |
| * @param value The <c>Age</c> header string. |
| * @return The parsed <c>Age</c> header, or <jk>null</jk> if the string was null. |
| */ |
| public static Age forString(String value) { |
| if (value == null) |
| return null; |
| return new Age(value); |
| } |
| |
| private Age(String value) { |
| super(value); |
| } |
| } |