Source Code Cross Referenced for HttpResponseStatus.java in  » Web-Server » asyncweb » org » safehaus » asyncweb » common » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » asyncweb » org.safehaus.asyncweb.common 
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:         */
020:        package org.safehaus.asyncweb.common;
021:
022:        import java.io.Serializable;
023:
024:        public class HttpResponseStatus implements  Serializable {
025:
026:            private static final long serialVersionUID = -5885201751942967031L;
027:
028:            private static final int MIN_ID = 100;
029:            private static final int MAX_ID = 599;
030:
031:            private static final HttpResponseStatus[] RESPONSE_TABLE = new HttpResponseStatus[MAX_ID + 1];
032:
033:            // Informational status codes
034:
035:            public static final HttpResponseStatus CONTINUE = new HttpResponseStatus(
036:                    100, "Continue", true, false);
037:
038:            public static final HttpResponseStatus SWITCHING_PROTOCOLS = new HttpResponseStatus(
039:                    101, "Switching Protocols", true, false);
040:
041:            // Successful status codes
042:
043:            public static final HttpResponseStatus OK = new HttpResponseStatus(
044:                    200, "OK", true, false);
045:
046:            public static final HttpResponseStatus CREATED = new HttpResponseStatus(
047:                    201, "Created", true, false);
048:
049:            public static final HttpResponseStatus ACCEPTED = new HttpResponseStatus(
050:                    202, "Accepted", true, false);
051:
052:            public static final HttpResponseStatus NON_AUTHORITATIVE = new HttpResponseStatus(
053:                    203, "Non-Authoritative Information", true, false);
054:
055:            public static final HttpResponseStatus NO_CONTENT = new HttpResponseStatus(
056:                    204, "No Content", false, false);
057:
058:            public static final HttpResponseStatus RESET_CONTENT = new HttpResponseStatus(
059:                    205, "Reset Content", false, false);
060:
061:            public static final HttpResponseStatus PARTIAL_CONTENT = new HttpResponseStatus(
062:                    206, "Partial Content", true, false);
063:
064:            // Redirection status codes
065:
066:            public static final HttpResponseStatus MULTIPLE_CHOICES = new HttpResponseStatus(
067:                    300, "Multiple Choices", true, false);
068:
069:            public static final HttpResponseStatus MOVED_PERMANENTLY = new HttpResponseStatus(
070:                    301, "Moved Permanently", true, false);
071:
072:            public static final HttpResponseStatus FOUND = new HttpResponseStatus(
073:                    302, "Found", true, false);
074:
075:            public static final HttpResponseStatus SEE_OTHER = new HttpResponseStatus(
076:                    303, "See Other", true, false);
077:
078:            public static final HttpResponseStatus NOT_MODIFIED = new HttpResponseStatus(
079:                    304, "Not Modified", false, false);
080:
081:            public static final HttpResponseStatus USE_PROXY = new HttpResponseStatus(
082:                    305, "Use Proxy", true, false);
083:
084:            public static final HttpResponseStatus TEMPORARY_REDIRECT = new HttpResponseStatus(
085:                    307, "Temporary Redirect", true, false);
086:
087:            // Client error codes
088:
089:            public static final HttpResponseStatus BAD_REQUEST = new HttpResponseStatus(
090:                    400, "Bad Request", true, true);
091:
092:            public static final HttpResponseStatus UNAUTHORIZED = new HttpResponseStatus(
093:                    401, "Unauthorized", true, false);
094:
095:            public static final HttpResponseStatus PAYMENT_REQUIRED = new HttpResponseStatus(
096:                    402, "Payment Required", true, false);
097:
098:            public static final HttpResponseStatus FORBIDDEN = new HttpResponseStatus(
099:                    403, "Forbidden", true, false);
100:
101:            public static final HttpResponseStatus NOT_FOUND = new HttpResponseStatus(
102:                    404, "Not Found", true, false);
103:
104:            public static final HttpResponseStatus METHOD_NOT_ALLOWED = new HttpResponseStatus(
105:                    405, "Method Not Allowed", true, false);
106:
107:            public static final HttpResponseStatus NOT_ACCEPTABLE = new HttpResponseStatus(
108:                    406, "Not Acceptable", true, false);
109:
110:            public static final HttpResponseStatus PROXY_AUTHENTICATION_REQUIRED = new HttpResponseStatus(
111:                    407, "Proxy Authentication Required", true, false);
112:
113:            public static final HttpResponseStatus REQUEST_TIMEOUT = new HttpResponseStatus(
114:                    408, "Request Time-out", true, true);
115:
116:            public static final HttpResponseStatus CONFLICT = new HttpResponseStatus(
117:                    409, "Conflict", true, false);
118:
119:            public static final HttpResponseStatus GONE = new HttpResponseStatus(
120:                    410, "Gone", true, false);
121:
122:            public static final HttpResponseStatus LENGTH_REQUIRED = new HttpResponseStatus(
123:                    411, "Length Required", true, true);
124:
125:            public static final HttpResponseStatus PRECONDITION_FAILED = new HttpResponseStatus(
126:                    412, "Precondition Failed", true, false);
127:
128:            public static final HttpResponseStatus REQUEST_ENTITY_TOO_LARGE = new HttpResponseStatus(
129:                    413, "Request Entity Too Large", true, true);
130:
131:            public static final HttpResponseStatus REQUEST_URI_TOO_LONG = new HttpResponseStatus(
132:                    414, "Request-URI Too Large", true, true);
133:
134:            public static final HttpResponseStatus UNSUPPORTED_MEDIA_TYPE = new HttpResponseStatus(
135:                    415, "Unsupported Media Type", true, false);
136:
137:            public static final HttpResponseStatus REQUEST_RANGE_NOT_SATISFIABLE = new HttpResponseStatus(
138:                    416, "Requested range not satisfiable", true, false);
139:
140:            public static final HttpResponseStatus EXPECTATION_FAILED = new HttpResponseStatus(
141:                    417, "Expectation Failed", true, false);
142:
143:            // Server error codes
144:
145:            public static final HttpResponseStatus INTERNAL_SERVER_ERROR = new HttpResponseStatus(
146:                    500, "Internal Server Error", true, true);
147:
148:            public static final HttpResponseStatus NOT_IMPLEMENTED = new HttpResponseStatus(
149:                    501, "Not Implemented", true, true);
150:
151:            public static final HttpResponseStatus BAD_GATEWAY = new HttpResponseStatus(
152:                    502, "Bad Gateway", true, false);
153:
154:            public static final HttpResponseStatus SERVICE_UNAVAILABLE = new HttpResponseStatus(
155:                    503, "Service Unavailable", true, true);
156:
157:            public static final HttpResponseStatus GATEWAY_TIMEOUT = new HttpResponseStatus(
158:                    504, "Gateway Time-out", true, false);
159:
160:            public static final HttpResponseStatus HTTP_VERSION_NOT_SUPPORTED = new HttpResponseStatus(
161:                    505, "HTTP Version not supported", true, false);
162:
163:            private final int code;
164:            private final transient boolean allowsMessageBody;
165:            private final transient boolean forcesConnectionClosure;
166:            private final transient Category category;
167:            private final transient String description;
168:
169:            /**
170:             * @return  <code>true</code> iff a message body may be transmitted in
171:             *          a response containing this response status
172:             */
173:            public boolean allowsMessageBody() {
174:                return allowsMessageBody;
175:            }
176:
177:            /** 
178:             * @return  <code>true</code> iff a connection which would normally be
179:             *          kept alive should be closed as a result of this response
180:             */
181:            public boolean forcesConnectionClosure() {
182:                return forcesConnectionClosure;
183:            }
184:
185:            /**
186:             * @return The response code of this status
187:             */
188:            public int getCode() {
189:                return code;
190:            }
191:
192:            /**
193:             * @return  The category of this status
194:             */
195:            public Category getCategory() {
196:                return category;
197:            }
198:
199:            /**
200:             * @return A description of this status
201:             */
202:            public String getDescription() {
203:                return description;
204:            }
205:
206:            /**
207:             * A string description of this status
208:             */
209:            public String toString() {
210:                return code + ": " + category + " - " + description;
211:            }
212:
213:            /**
214:             * Returns the <code>ResponseStatus</code> with the specified
215:             * status id.
216:             * If no status exists with the specified id, a new status is created
217:             * and registered based on the category applicable to the id:<br/>
218:             * <table border="1">
219:             *   <tr><td>100 - 199</td><td>Informational</td></tr>
220:             *   <tr><td>200 - 299</td><td>Successful</td></tr>
221:             *   <tr><td>300 - 399</td><td>Redirection</td></tr>
222:             *   <tr><td>400 - 499</td><td>Client Error</td></tr>
223:             *   <tr><td>500 - 599</td><td>Server Error</td></tr>
224:             * <table>.
225:             * 
226:             * @param id  The id of the desired response status
227:             * @return    The <code>ResponseStatus</code>
228:             * @throws IllegalStateException  If the specified id is invalid
229:             */
230:            public static HttpResponseStatus forId(int id) {
231:                if (id < MIN_ID || id > MAX_ID) {
232:                    throw new IllegalArgumentException("Illegal response id: "
233:                            + id);
234:                }
235:                HttpResponseStatus status = RESPONSE_TABLE[id];
236:                if (status == null) {
237:                    Category cat = categoryForId(id);
238:                    if (cat == null) {
239:                        throw new IllegalArgumentException(
240:                                "Illegal response id: " + id);
241:                    }
242:                    status = new HttpResponseStatus(id, cat.toString(), true,
243:                            cat.isDefaultConnectionClosure());
244:                    RESPONSE_TABLE[id] = status;
245:                }
246:                return status;
247:            }
248:
249:            /**
250:             * Obtains the response category which covers the specified response 
251:             * id
252:             * 
253:             * @param id  The id
254:             * @return    The category - or <code>null</code> if no category covers
255:             *            the specified response id
256:             */
257:            private static Category categoryForId(int id) {
258:                int catId = id / 100;
259:                switch (catId) {
260:                case 1:
261:                    return Category.INFORMATIONAL;
262:                case 2:
263:                    return Category.SUCCESSFUL;
264:                case 3:
265:                    return Category.REDIRECTION;
266:                case 4:
267:                    return Category.CLIENT_ERROR;
268:                case 5:
269:                    return Category.SERVER_ERROR;
270:                default:
271:                    return null;
272:                }
273:            }
274:
275:            private HttpResponseStatus(int code, String description,
276:                    boolean allowsMessageBody, boolean forcesConnectionClosure) {
277:                RESPONSE_TABLE[code] = this ;
278:                this .code = code;
279:                this .category = categoryForId(code);
280:                this .description = description;
281:                this .allowsMessageBody = allowsMessageBody;
282:                this .forcesConnectionClosure = forcesConnectionClosure;
283:            }
284:
285:            private Object readResolve() {
286:                return forId(this .code);
287:            }
288:
289:            /**
290:             * Category of response
291:             * 
292:             * @author irvingd
293:             */
294:            public static enum Category {
295:                /**
296:                 * Indicates a provisional response
297:                 */
298:                INFORMATIONAL,
299:
300:                /**
301:                 * Indicates that the client's request was successfully received, 
302:                 * understood, and accepted
303:                 */
304:                SUCCESSFUL,
305:
306:                /**
307:                 * Indicates that further action needs to be taken by the user agent in order 
308:                 * to fulfill the request
309:                 */
310:                REDIRECTION,
311:
312:                /**
313:                 * Indicates that the client seems to have erred
314:                 */
315:                CLIENT_ERROR,
316:
317:                /**
318:                 * Indicate that the server is aware that it has erred or is incapable 
319:                 * of performing the request
320:                 */
321:                SERVER_ERROR(true), ;
322:
323:                private boolean defaultConnectionClosure;
324:
325:                private Category() {
326:                    this (false);
327:                }
328:
329:                private Category(boolean defaultConnectionClosure) {
330:                    this .defaultConnectionClosure = defaultConnectionClosure;
331:                }
332:
333:                public boolean isDefaultConnectionClosure() {
334:                    return defaultConnectionClosure;
335:                }
336:            }
337:        }
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