Source Code Cross Referenced for TransportHeadersAdapter.java in  » Web-Services-AXIS2 » jax-ws » org » apache » axis2 » jaxws » handler » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Services AXIS2 » jax ws » org.apache.axis2.jaxws.handler 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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:        package org.apache.axis2.jaxws.handler;
020:
021:        import org.apache.axis2.jaxws.ExceptionFactory;
022:        import org.apache.axis2.jaxws.core.MessageContext;
023:        import org.apache.axis2.transport.http.HTTPConstants;
024:        import org.apache.commons.logging.Log;
025:        import org.apache.commons.logging.LogFactory;
026:
027:        import java.util.ArrayList;
028:        import java.util.Collection;
029:        import java.util.HashMap;
030:        import java.util.List;
031:        import java.util.Map;
032:        import java.util.Set;
033:
034:        /**
035:         * The JAX-WS exposes transport properties whose value is Map<String, List<String>>.  The
036:         * String is the content-id and DataHandler is the data handler representing the TransportHeaders.
037:         * 
038:         * The JAX-WS MessageContext stores transport properties in an Map object located on the AXIS2
039:         * MessageContext.
040:         * 
041:         * This class, TransportHeadersAdapter, is an adapter between the Map<String, List<String>> 
042:         * interface needed by the properties and the actual implementation.  
043:         * All useful function is delegated through the MessageContext, 
044:         * so that we only have one copy of the information.  
045:         * 
046:         * To use this class, invoke the install method.  This will create an TransportHeadersAdapter 
047:         * (if necessary) and install it on the property JAX-WS standard TransportHeaders properties.  
048:         * (See BaseMessageContext.)
049:         */
050:        public class TransportHeadersAdapter implements  Map {
051:
052:            private static final Log log = LogFactory
053:                    .getLog(TransportHeadersAdapter.class);
054:
055:            MessageContext mc; // MessageContext which provides the backing implementation
056:            String propertyName; // The name of the JAX-WS property
057:
058:            /**
059:             * @param mc
060:             * @param propertyName
061:             */
062:            private TransportHeadersAdapter(MessageContext mc,
063:                    String propertyName) {
064:                this .mc = mc;
065:                this .propertyName = propertyName;
066:            }
067:
068:            /**
069:             * Add the TransportHeadersAdapter as the property for TransportHeaders
070:             * @param mc MessageContext
071:             */
072:            public static void install(MessageContext mc) {
073:
074:                boolean isRequest = (mc.getMEPContext()
075:                        .getRequestMessageContext() == mc);
076:
077:                // The property is either a request or response
078:                String propertyName = (isRequest) ? javax.xml.ws.handler.MessageContext.HTTP_REQUEST_HEADERS
079:                        : javax.xml.ws.handler.MessageContext.HTTP_RESPONSE_HEADERS;
080:
081:                if (log.isDebugEnabled()) {
082:                    log.debug("Installing TransportHeadersAdapter for "
083:                            + propertyName);
084:                }
085:
086:                // See if there is an existing map
087:                Object map = mc.getProperty(propertyName);
088:
089:                // Reuse existing TransportHeadersAdapter
090:                if (map instanceof  TransportHeadersAdapter) {
091:                    if (log.isDebugEnabled()) {
092:                        log
093:                                .debug("An TransportHeadersAdapter is already installed.  "
094:                                        + "Reusing the existing one.");
095:                    }
096:                    return;
097:                }
098:
099:                // Create a new TransportHeadersAdapter and set it on the property 
100:                TransportHeadersAdapter tha = new TransportHeadersAdapter(mc,
101:                        propertyName);
102:
103:                if (map != null) {
104:                    if (log.isDebugEnabled()) {
105:                        log
106:                                .debug("The TransportHeaders in the existing map ("
107:                                        + propertyName
108:                                        + ") are copied to the TransportHeadersAdapter.");
109:                    }
110:                    // Copy the existing Map contents to this new adapter
111:                    tha.putAll((Map) map);
112:                }
113:                mc.setProperty(propertyName, tha);
114:
115:                // If this is a response, then also set the property for the response code
116:                if (!isRequest) {
117:                    Object value = mc
118:                            .getProperty(HTTPConstants.MC_HTTP_STATUS_CODE);
119:                    mc
120:                            .setProperty(
121:                                    javax.xml.ws.handler.MessageContext.HTTP_RESPONSE_CODE,
122:                                    value);
123:                }
124:            }
125:
126:            /**
127:             * Get/Create the implementation map from the Axis2 properties
128:             * @param mc
129:             * @return Map
130:             */
131:            private static Map getDelegateMap(MessageContext mc) {
132:                // Get the axis2 Map
133:                Map map = (Map) mc
134:                        .getProperty(org.apache.axis2.context.MessageContext.TRANSPORT_HEADERS);
135:                if (map == null) {
136:                    map = new HashMap();
137:                    mc
138:                            .setProperty(
139:                                    org.apache.axis2.context.MessageContext.TRANSPORT_HEADERS,
140:                                    map);
141:                }
142:                return map;
143:            }
144:
145:            /**
146:             * Convert intput into a List
147:             * @param o
148:             * @return List
149:             */
150:            private static List<String> convertToList(Object o) {
151:                if (o == null) {
152:                    return null;
153:                } else if (o instanceof  List) {
154:                    return (List) o;
155:                } else if (o instanceof  String) {
156:                    List l = new ArrayList();
157:                    l.add(o);
158:                    return l;
159:                } else {
160:                    throw ExceptionFactory
161:                            .makeWebServiceException("Cannot convert from "
162:                                    + o.getClass() + " to List<String>");
163:                }
164:            }
165:
166:            private static String convertToString(Object o) {
167:                if (o == null) {
168:                    return null;
169:                } else if (o instanceof  String) {
170:                    return (String) o;
171:                } else if (o instanceof  List) {
172:
173:                    List l = (List) o;
174:                    if (l.size() == 0) {
175:                        return null;
176:                    } else if (l.size() == 1) {
177:                        return (String) l.get(0);
178:                    }
179:                }
180:                throw ExceptionFactory
181:                        .makeWebServiceException("Cannot convert from "
182:                                + o.getClass() + " to String");
183:            }
184:
185:            public int size() {
186:                return getDelegateMap(mc).size();
187:            }
188:
189:            public boolean isEmpty() {
190:                return getDelegateMap(mc).isEmpty();
191:            }
192:
193:            public boolean containsKey(Object key) {
194:                return getDelegateMap(mc).containsKey(key);
195:            }
196:
197:            public boolean containsValue(Object value) {
198:                // TODO Should walk all of the values to do this correctly.
199:                String valueString = convertToString(value);
200:                return getDelegateMap(mc).containsValue(valueString);
201:            }
202:
203:            public Object get(Object key) {
204:                Object value = convertToList(getDelegateMap(mc).get(key));
205:                if (log.isDebugEnabled()) {
206:                    log.debug("get(" + key + ") returns value=" + value);
207:                }
208:                return value;
209:            }
210:
211:            public Object put(Object key, Object value) {
212:                if (log.isDebugEnabled()) {
213:                    log.debug("put(" + key + " , " + value + ")");
214:                }
215:                String valueString = convertToString(value);
216:                return convertToList(getDelegateMap(mc).put(key, valueString));
217:            }
218:
219:            public Object remove(Object key) {
220:                return convertToList(getDelegateMap(mc).remove(key));
221:            }
222:
223:            public void putAll(Map t) {
224:                for (Object key : t.keySet()) {
225:                    Object value = t.get(key);
226:                    if (log.isDebugEnabled()) {
227:                        log.debug("put via putAll (" + key + " , " + value
228:                                + ")");
229:                    }
230:                    put(key, value);
231:                }
232:            }
233:
234:            public void clear() {
235:                getDelegateMap(mc).clear();
236:            }
237:
238:            public Set keySet() {
239:                return getDelegateMap(mc).keySet();
240:            }
241:
242:            public Collection values() {
243:                Map tempMap = new HashMap<String, List<String>>();
244:                tempMap.putAll(this );
245:                return tempMap.values();
246:            }
247:
248:            public Set entrySet() {
249:                Map tempMap = new HashMap<String, List<String>>();
250:                tempMap.putAll(this );
251:                return tempMap.entrySet();
252:            }
253:
254:            public String toString() {
255:                return "TransportHeadersAdapter: "
256:                        + getDelegateMap(mc).toString();
257:            }
258:        }
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