| // *************************************************************************************************************************** |
| // * 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>Last-Modified</l> HTTP response header. |
| * |
| * <p> |
| * The last modified date for the requested object (in "HTTP-date" format as defined by RFC 7231). |
| * |
| * <h5 class='figure'>Example</h5> |
| * <p class='bcode w800'> |
| * Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT |
| * </p> |
| * |
| * <h5 class='topic'>RFC2616 Specification</h5> |
| * |
| * The Last-Modified entity-header field indicates the date and time at which the origin server believes the variant was |
| * last modified. |
| * |
| * <p class='bcode w800'> |
| * Last-Modified = "Last-Modified" ":" HTTP-date |
| * </p> |
| * |
| * <p> |
| * An example of its use is... |
| * <p class='bcode w800'> |
| * Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT |
| * </p> |
| * |
| * <p> |
| * The exact meaning of this header field depends on the implementation of the origin server and the nature of the |
| * original resource. |
| * For files, it may be just the file system last-modified time. |
| * For entities with dynamically included parts, it may be the most recent of the set of last-modify times for its |
| * component parts. |
| * For database gateways, it may be the last-update time stamp of the record. |
| * For virtual objects, it may be the last time the internal state changed. |
| * |
| * <p> |
| * An origin server MUST NOT send a Last-Modified date which is later than the server's time of message origination. |
| * In such cases, where the resource's last modification would indicate some time in the future, the server MUST replace |
| * that date with the message origination date. |
| * |
| * <p> |
| * An origin server SHOULD obtain the Last-Modified value of the entity as close as possible to the time that it |
| * generates the Date value of its response. |
| * This allows a recipient to make an accurate assessment of the entity's modification time, especially if the entity |
| * changes near the time that the response is generated. |
| * |
| * <p> |
| * HTTP/1.1 servers SHOULD send Last-Modified whenever feasible. |
| * |
| * <ul class='seealso'> |
| * <li class='extlink'>{@doc RFC2616} |
| * </ul> |
| */ |
| @Header("Last-Modified") |
| public final class LastModified extends HeaderDate { |
| |
| /** |
| * Returns a parsed <c>Last-Modified</c> header. |
| * |
| * @param value The <c>Last-Modified</c> header string. |
| * @return The parsed <c>Last-Modified</c> header, or <jk>null</jk> if the string was null. |
| */ |
| public static LastModified forString(String value) { |
| if (value == null) |
| return null; |
| return new LastModified(value); |
| } |
| |
| private LastModified(String value) { |
| super(value); |
| } |
| } |