Source Code Cross Referenced for BasicHttpProcessor.java in  » Net » httpcomponents-core-4.0-beta1 » org » apache » http » protocol » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » httpcomponents core 4.0 beta1 » org.apache.http.protocol 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $HeadURL: https://svn.apache.org/repos/asf/httpcomponents/httpcore/tags/4.0-beta1/module-main/src/main/java/org/apache/http/protocol/BasicHttpProcessor.java $
003:         * $Revision: 613298 $
004:         * $Date: 2008-01-18 23:09:22 +0100 (Fri, 18 Jan 2008) $
005:         *
006:         * ====================================================================
007:         * Licensed to the Apache Software Foundation (ASF) under one
008:         * or more contributor license agreements.  See the NOTICE file
009:         * distributed with this work for additional information
010:         * regarding copyright ownership.  The ASF licenses this file
011:         * to you under the Apache License, Version 2.0 (the
012:         * "License"); you may not use this file except in compliance
013:         * with the License.  You may obtain a copy of the License at
014:         *
015:         *   http://www.apache.org/licenses/LICENSE-2.0
016:         *
017:         * Unless required by applicable law or agreed to in writing,
018:         * software distributed under the License is distributed on an
019:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
020:         * KIND, either express or implied.  See the License for the
021:         * specific language governing permissions and limitations
022:         * under the License.
023:         * ====================================================================
024:         *
025:         * This software consists of voluntary contributions made by many
026:         * individuals on behalf of the Apache Software Foundation.  For more
027:         * information on the Apache Software Foundation, please see
028:         * <http://www.apache.org/>.
029:         *
030:         */
031:
032:        package org.apache.http.protocol;
033:
034:        import java.io.IOException;
035:        import java.util.ArrayList;
036:        import java.util.Iterator;
037:        import java.util.List;
038:
039:        import org.apache.http.HttpException;
040:        import org.apache.http.HttpRequest;
041:        import org.apache.http.HttpRequestInterceptor;
042:        import org.apache.http.HttpResponse;
043:        import org.apache.http.HttpResponseInterceptor;
044:
045:        /**
046:         * Keeps lists of interceptors for processing requests and responses.
047:         *
048:         * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
049:         * @author Andrea Selva
050:         *
051:         * @version $Revision: 613298 $
052:         * 
053:         * @since 4.0
054:         */
055:        public final class BasicHttpProcessor implements  HttpProcessor,
056:                HttpRequestInterceptorList, HttpResponseInterceptorList,
057:                Cloneable {
058:
059:            protected List requestInterceptors = null;
060:            protected List responseInterceptors = null;
061:
062:            // non-Javadoc, see interface HttpRequestInterceptorList
063:            public void addRequestInterceptor(final HttpRequestInterceptor itcp) {
064:
065:                if (itcp == null) {
066:                    return;
067:                }
068:                if (this .requestInterceptors == null) {
069:                    this .requestInterceptors = new ArrayList();
070:                }
071:                this .requestInterceptors.add(itcp);
072:            }
073:
074:            // non-Javadoc, see interface HttpRequestInterceptorList
075:            public void addRequestInterceptor(
076:                    final HttpRequestInterceptor itcp, int index) {
077:                if (index < 0) {
078:                    throw new IndexOutOfBoundsException(String.valueOf(index));
079:                }
080:                if (itcp == null) {
081:                    return;
082:                }
083:
084:                if (this .requestInterceptors == null) {
085:                    if (index > 0) {
086:                        throw new IndexOutOfBoundsException(String
087:                                .valueOf(index));
088:                    }
089:                    this .requestInterceptors = new ArrayList();
090:                }
091:                this .requestInterceptors.add(index, itcp);
092:            }
093:
094:            public void addResponseInterceptor(HttpResponseInterceptor itcp,
095:                    int index) {
096:                if (index < 0) {
097:                    throw new IndexOutOfBoundsException(String.valueOf(index));
098:                }
099:                if (itcp == null) {
100:                    return;
101:                }
102:
103:                if (this .responseInterceptors == null) {
104:                    if (index > 0) {
105:                        throw new IndexOutOfBoundsException(String
106:                                .valueOf(index));
107:                    }
108:                    this .responseInterceptors = new ArrayList();
109:                }
110:                this .responseInterceptors.add(index, itcp);
111:            }
112:
113:            // non-Javadoc, see interface HttpRequestInterceptorList
114:            public void removeRequestInterceptorByClass(final Class clazz) {
115:                if (this .requestInterceptors == null) {
116:                    return;
117:                }
118:                for (Iterator it = this .requestInterceptors.iterator(); it
119:                        .hasNext();) {
120:                    Object request = it.next();
121:                    if (request.getClass().equals(clazz)) {
122:                        it.remove();
123:                    }
124:                }
125:            }
126:
127:            // non-Javadoc, see interface HttpResponseInterceptorList
128:            public void removeResponseInterceptorByClass(final Class clazz) {
129:                if (this .responseInterceptors == null) {
130:                    return;
131:                }
132:                for (Iterator it = this .responseInterceptors.iterator(); it
133:                        .hasNext();) {
134:                    Object request = it.next();
135:                    if (request.getClass().equals(clazz)) {
136:                        it.remove();
137:                    }
138:                }
139:            }
140:
141:            /**
142:             * Same as {@link #addRequestInterceptor(HttpRequestInterceptor) addRequestInterceptor}.
143:             *
144:             * @param interceptor       the interceptor to add
145:             */
146:            public final void addInterceptor(
147:                    final HttpRequestInterceptor interceptor) {
148:                addRequestInterceptor(interceptor);
149:            }
150:
151:            public final void addInterceptor(
152:                    final HttpRequestInterceptor interceptor, int index) {
153:                addRequestInterceptor(interceptor, index);
154:            }
155:
156:            // non-Javadoc, see interface HttpRequestInterceptorList
157:            public int getRequestInterceptorCount() {
158:                return (this .requestInterceptors == null) ? 0
159:                        : this .requestInterceptors.size();
160:            }
161:
162:            // non-Javadoc, see interface HttpRequestInterceptorList
163:            public HttpRequestInterceptor getRequestInterceptor(int index) {
164:
165:                if ((this .requestInterceptors == null) || (index < 0)
166:                        || (index >= this .requestInterceptors.size()))
167:                    return null;
168:
169:                return (HttpRequestInterceptor) this .requestInterceptors
170:                        .get(index);
171:            }
172:
173:            // non-Javadoc, see interface HttpRequestInterceptorList
174:            public void clearRequestInterceptors() {
175:                this .requestInterceptors = null;
176:            }
177:
178:            // non-Javadoc, see interface HttpResponseInterceptorList
179:            public void addResponseInterceptor(
180:                    final HttpResponseInterceptor itcp) {
181:                if (itcp == null) {
182:                    return;
183:                }
184:                if (this .responseInterceptors == null) {
185:                    this .responseInterceptors = new ArrayList();
186:                }
187:                this .responseInterceptors.add(itcp);
188:            }
189:
190:            /**
191:             * Same as {@link #addResponseInterceptor(HttpResponseInterceptor) addResponseInterceptor}.
192:             *
193:             * @param interceptor       the interceptor to add
194:             */
195:            public final void addInterceptor(
196:                    final HttpResponseInterceptor interceptor) {
197:                addResponseInterceptor(interceptor);
198:            }
199:
200:            public final void addInterceptor(
201:                    final HttpResponseInterceptor interceptor, int index) {
202:                addResponseInterceptor(interceptor, index);
203:            }
204:
205:            // non-Javadoc, see interface HttpResponseInterceptorList
206:            public int getResponseInterceptorCount() {
207:                return (this .responseInterceptors == null) ? 0
208:                        : this .responseInterceptors.size();
209:            }
210:
211:            // non-Javadoc, see interface HttpResponseInterceptorList
212:            public HttpResponseInterceptor getResponseInterceptor(int index) {
213:
214:                if ((this .responseInterceptors == null) || (index < 0)
215:                        || (index >= this .responseInterceptors.size()))
216:                    return null;
217:
218:                return (HttpResponseInterceptor) this .responseInterceptors
219:                        .get(index);
220:            }
221:
222:            // non-Javadoc, see interface HttpResponseInterceptorList
223:            public void clearResponseInterceptors() {
224:                this .responseInterceptors = null;
225:            }
226:
227:            /**
228:             * Sets the interceptor lists.
229:             * First, both interceptor lists maintained by this processor
230:             * will be cleared.
231:             * Subsequently,
232:             * elements of the argument list that are request interceptors will be
233:             * added to the request interceptor list.
234:             * Elements that are response interceptors will be
235:             * added to the response interceptor list.
236:             * Elements that are both request and response interceptor will be
237:             * added to both lists.
238:             * Elements that are neither request nor response interceptor
239:             * will be ignored.
240:             *
241:             * @param list      the list of request and response interceptors
242:             *                  from which to initialize
243:             */
244:            public void setInterceptors(final List list) {
245:                if (list == null) {
246:                    throw new IllegalArgumentException("List must not be null.");
247:                }
248:                if (this .requestInterceptors != null) {
249:                    this .requestInterceptors.clear();
250:                }
251:                if (this .responseInterceptors != null) {
252:                    this .responseInterceptors.clear();
253:                }
254:                for (int i = 0; i < list.size(); i++) {
255:                    Object obj = list.get(i);
256:                    if (obj instanceof  HttpRequestInterceptor) {
257:                        addInterceptor((HttpRequestInterceptor) obj);
258:                    }
259:                    if (obj instanceof  HttpResponseInterceptor) {
260:                        addInterceptor((HttpResponseInterceptor) obj);
261:                    }
262:                }
263:            }
264:
265:            /**
266:             * Clears both interceptor lists maintained by this processor.
267:             */
268:            public void clearInterceptors() {
269:                clearRequestInterceptors();
270:                clearResponseInterceptors();
271:            }
272:
273:            // non-Javadoc, see interface HttpRequestInterceptor (via HttpProcessor)
274:            public void process(final HttpRequest request,
275:                    final HttpContext context) throws IOException,
276:                    HttpException {
277:                if (this .requestInterceptors != null) {
278:                    for (int i = 0; i < this .requestInterceptors.size(); i++) {
279:                        HttpRequestInterceptor interceptor = (HttpRequestInterceptor) this .requestInterceptors
280:                                .get(i);
281:                        interceptor.process(request, context);
282:                    }
283:                }
284:            }
285:
286:            // non-Javadoc, see interface HttpResponseInterceptor (via HttpProcessor)
287:            public void process(final HttpResponse response,
288:                    final HttpContext context) throws IOException,
289:                    HttpException {
290:                if (this .responseInterceptors != null) {
291:                    for (int i = 0; i < this .responseInterceptors.size(); i++) {
292:                        HttpResponseInterceptor interceptor = (HttpResponseInterceptor) this .responseInterceptors
293:                                .get(i);
294:                        interceptor.process(response, context);
295:                    }
296:                }
297:            }
298:
299:            protected void copyInterceptors(final BasicHttpProcessor target) {
300:                if (this .requestInterceptors != null) {
301:                    target.requestInterceptors = new ArrayList(
302:                            this .requestInterceptors);
303:                }
304:                if (this .responseInterceptors != null) {
305:                    target.responseInterceptors = new ArrayList(
306:                            this .responseInterceptors);
307:                }
308:            }
309:
310:            /**
311:             * Creates a copy of this instance
312:             *
313:             * @return new instance of the BasicHttpProcessor
314:             */
315:            public BasicHttpProcessor copy() {
316:                BasicHttpProcessor clone = new BasicHttpProcessor();
317:                copyInterceptors(clone);
318:                return clone;
319:            }
320:
321:            public Object clone() throws CloneNotSupportedException {
322:                BasicHttpProcessor clone = (BasicHttpProcessor) super.clone();
323:                copyInterceptors(clone);
324:                return clone;
325:            }
326:
327:        }
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