| /* |
| * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/DefaultedHttpContext.java $ |
| * $Revision: 654882 $ |
| * $Date: 2008-05-09 09:58:59 -0700 (Fri, 09 May 2008) $ |
| * |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.http.protocol; |
| |
| /** |
| * {@link HttpContext} implementation that delegates resolution of an attribute |
| * to the given default {@link HttpContext} instance if the attribute is not |
| * present in the local one. The state of the local context can be mutated, |
| * whereas the default context is treated as read-only. |
| * |
| * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> |
| * |
| * @version $Revision: 654882 $ |
| */ |
| public final class DefaultedHttpContext implements HttpContext { |
| |
| private final HttpContext local; |
| private final HttpContext defaults; |
| |
| public DefaultedHttpContext(final HttpContext local, final HttpContext defaults) { |
| super(); |
| if (local == null) { |
| throw new IllegalArgumentException("HTTP context may not be null"); |
| } |
| this.local = local; |
| this.defaults = defaults; |
| } |
| |
| public Object getAttribute(final String id) { |
| Object obj = this.local.getAttribute(id); |
| if (obj == null) { |
| return this.defaults.getAttribute(id); |
| } else { |
| return obj; |
| } |
| } |
| |
| public Object removeAttribute(final String id) { |
| return this.local.removeAttribute(id); |
| } |
| |
| public void setAttribute(final String id, final Object obj) { |
| this.local.setAttribute(id, obj); |
| } |
| |
| public HttpContext getDefaults() { |
| return this.defaults; |
| } |
| |
| } |