| /* |
| * 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.axis2.transport.http; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import java.util.Collection; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Pass-Thru / delayed get and put of the values from HttpServletRequest |
| */ |
| public class TransportHeaders implements Map { |
| HttpServletRequest req; |
| // This map contains the headers from the request; it will be filled in lazily if needed, |
| // for performance |
| HashMap headerMap = null; |
| // This map contains properties that have been put onto the map; it is not populated by values |
| // from the HttpServletRequest. A null value means the headerMap has been fully populated and |
| // any values that were in localHeaderMap have been migrated to headerMap. |
| HashMap localHeaderMap = new HashMap(); |
| |
| public TransportHeaders(HttpServletRequest req) { |
| this.req = req; |
| } |
| |
| /** |
| * This will fully populate the HashMap with the value from the HttpSerlvetRequest and migrate |
| * any values previously put onto localHeaderMap into the new HashMap. |
| * |
| * Note this is a bit non-performant, so it is only done if needed. |
| * If/when it is done, there may be properties that have been set on the localHeaderMap. |
| * If headerMap must be created due to a call |
| * to size, or isEmpty, or some other method which requires a fully populated map, then any |
| * previously created entries in the localHeaderMap are migrated to the new hashmap. |
| * After that localHeaderMap is released and only headerMap is used after that. |
| */ |
| private void init() { |
| headerMap = new HashMap(); |
| Enumeration headerNames = req.getHeaderNames(); |
| |
| while (headerNames.hasMoreElements()) { |
| String key = (String) headerNames.nextElement(); |
| String value = req.getHeader(key); |
| |
| headerMap.put(key, value); |
| } |
| |
| // Migrate any previously set local properties to the newly created hashmap then release |
| // the local hashmap |
| Set localHeaderSet = localHeaderMap.entrySet(); |
| Iterator localHeaderIterator = localHeaderSet.iterator(); |
| while (localHeaderIterator.hasNext()) { |
| Map.Entry localHeaderEntry = (Map.Entry) localHeaderIterator.next(); |
| headerMap.put(localHeaderEntry.getKey(), localHeaderEntry.getValue()); |
| } |
| localHeaderMap = null; |
| } |
| |
| public int size() { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.size(); |
| } |
| |
| public void clear() { |
| if (headerMap != null) { |
| headerMap.clear(); |
| } |
| if (localHeaderMap != null) { |
| localHeaderMap.clear(); |
| } |
| } |
| |
| public boolean isEmpty() { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.isEmpty(); |
| } |
| |
| public boolean containsKey(Object key) { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.containsKey(key); |
| } |
| |
| public boolean containsValue(Object value) { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.containsValue(value); |
| } |
| |
| public Collection values() { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.values(); |
| } |
| |
| public void putAll(Map t) { |
| if (headerMap == null) { |
| init(); |
| } |
| headerMap.putAll(t); |
| } |
| |
| public Set entrySet() { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.entrySet(); |
| } |
| |
| public Set keySet() { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.keySet(); |
| } |
| |
| public Object get(Object key) { |
| // If there is a local map, look there first. |
| if (localHeaderMap != null) { |
| Object returnValue = null; |
| returnValue = localHeaderMap.get(key); |
| if (returnValue != null) { |
| return returnValue; |
| } |
| } |
| if (headerMap == null) { |
| return req.getHeader((String) key); |
| } |
| return headerMap.get(key); |
| } |
| |
| public Object remove(Object key) { |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.remove(key); |
| } |
| |
| public Object put(Object key, Object value) { |
| if (localHeaderMap != null) { |
| return localHeaderMap.put(key, value); |
| } |
| if (headerMap == null) { |
| init(); |
| } |
| return headerMap.put(key, value); |
| } |
| } |