Source Code Cross Referenced for DefaultLinkService.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » portal » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.cocoon.portal.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         *
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package org.apache.cocoon.portal.impl;
018:
019:        import java.io.UnsupportedEncodingException;
020:        import java.util.Iterator;
021:        import java.util.List;
022:
023:        import org.apache.avalon.framework.activity.Disposable;
024:        import org.apache.avalon.framework.context.Context;
025:        import org.apache.avalon.framework.context.ContextException;
026:        import org.apache.avalon.framework.context.Contextualizable;
027:        import org.apache.avalon.framework.logger.AbstractLogEnabled;
028:        import org.apache.avalon.framework.parameters.ParameterException;
029:        import org.apache.avalon.framework.parameters.Parameterizable;
030:        import org.apache.avalon.framework.parameters.Parameters;
031:        import org.apache.avalon.framework.service.ServiceException;
032:        import org.apache.avalon.framework.service.ServiceManager;
033:        import org.apache.avalon.framework.service.Serviceable;
034:        import org.apache.avalon.framework.thread.ThreadSafe;
035:        import org.apache.cocoon.components.ContextHelper;
036:        import org.apache.cocoon.environment.Request;
037:        import org.apache.cocoon.portal.LinkService;
038:        import org.apache.cocoon.portal.event.ComparableEvent;
039:        import org.apache.cocoon.portal.event.ConvertableEvent;
040:        import org.apache.cocoon.portal.event.Event;
041:        import org.apache.cocoon.portal.event.EventConverter;
042:        import org.apache.cocoon.portal.event.RequestEvent;
043:        import org.apache.cocoon.util.NetUtils;
044:
045:        /**
046:         *
047:         * @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
048:         * @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
049:         * 
050:         * @version $Id: DefaultLinkService.java 433543 2006-08-22 06:22:54Z crossley $
051:         */
052:        public class DefaultLinkService extends AbstractLogEnabled implements 
053:                LinkService, ThreadSafe, Serviceable, Disposable,
054:                Contextualizable, Parameterizable {
055:
056:            /** The converter used to convert an event into a request parameter */
057:            protected EventConverter converter;
058:            /** The service manager */
059:            protected ServiceManager manager;
060:            /** The cocoon context */
061:            protected Context context;
062:
063:            protected Boolean eventsMarshalled;
064:
065:            /** Default port used for http. */
066:            protected int defaultPort = 80;
067:            /** Default port used for https. */
068:            protected int defaultSecurePort = 443;
069:
070:            /**
071:             * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
072:             */
073:            public void service(ServiceManager manager) throws ServiceException {
074:                this .manager = manager;
075:                this .converter = (EventConverter) this .manager
076:                        .lookup(EventConverter.ROLE);
077:            }
078:
079:            /**
080:             * @see org.apache.avalon.framework.parameters.Parameterizable#parameterize(org.apache.avalon.framework.parameters.Parameters)
081:             */
082:            public void parameterize(Parameters params)
083:                    throws ParameterException {
084:                this .defaultPort = params.getParameterAsInteger("defaultPort",
085:                        this .defaultPort);
086:                this .defaultSecurePort = params.getParameterAsInteger(
087:                        "defaultSecurePort", this .defaultSecurePort);
088:            }
089:
090:            /**
091:             * Return the current info for the request.
092:             * @return A LinkInfo object.
093:             */
094:            protected LinkInfo getInfo() {
095:                final Request request = ContextHelper.getRequest(this .context);
096:                LinkInfo info = (LinkInfo) request
097:                        .getAttribute(DefaultLinkService.class.getName());
098:                if (info == null) {
099:                    synchronized (this ) {
100:                        info = (LinkInfo) request
101:                                .getAttribute(DefaultLinkService.class
102:                                        .getName());
103:                        if (info == null) {
104:                            info = new LinkInfo(request, this .defaultPort,
105:                                    this .defaultSecurePort);
106:                            request.setAttribute(DefaultLinkService.class
107:                                    .getName(), info);
108:                        }
109:                    }
110:                }
111:                return info;
112:            }
113:
114:            /**
115:             * @see org.apache.cocoon.portal.LinkService#isSecure()
116:             */
117:            public boolean isSecure() {
118:                return ContextHelper.getRequest(this .context).isSecure();
119:            }
120:
121:            /**
122:             * @see org.apache.cocoon.portal.LinkService#encodeURL(String url)
123:             */
124:            public String encodeURL(String url) {
125:                return ContextHelper.getResponse(this .context).encodeURL(url);
126:            }
127:
128:            /**
129:             * @see org.apache.cocoon.portal.LinkService#getLinkURI(org.apache.cocoon.portal.event.Event)
130:             */
131:            public String getLinkURI(Event event) {
132:                return this .getLinkURI(event, null);
133:            }
134:
135:            /**
136:             * @see org.apache.cocoon.portal.LinkService#getLinkURI(org.apache.cocoon.portal.event.Event, Boolean)
137:             */
138:            public String getLinkURI(Event event, Boolean secure) {
139:                if (event == null) {
140:                    return this .getRefreshLinkURI(secure);
141:                }
142:                final LinkInfo info = this .getInfo();
143:                final StringBuffer buffer = new StringBuffer(initBuffer(info,
144:                        event, secure));
145:                boolean hasParams = info.hasParameters();
146:
147:                // add comparable events
148:                final boolean comparableEvent = event instanceof  ComparableEvent;
149:                Iterator iter = info.comparableEvents.iterator();
150:                while (iter.hasNext()) {
151:                    Object[] objects = (Object[]) iter.next();
152:                    ComparableEvent current = (ComparableEvent) objects[0];
153:                    if (!comparableEvent
154:                            || !current.equalsEvent((ComparableEvent) event)) {
155:                        if (hasParams) {
156:                            buffer.append('&');
157:                        } else {
158:                            buffer.append('?');
159:                        }
160:                        try {
161:                            buffer.append((String) objects[1]).append('=')
162:                                    .append(
163:                                            NetUtils.encode(
164:                                                    (String) objects[2],
165:                                                    "utf-8"));
166:                        } catch (UnsupportedEncodingException uee) {
167:                            // ignore this as utf-8 is always supported
168:                        }
169:                        hasParams = true;
170:                    }
171:                }
172:
173:                // now add event
174:                hasParams = this .addEvent(buffer, event, hasParams);
175:
176:                return buffer.toString();
177:            }
178:
179:            protected String initBuffer(LinkInfo info, Event event,
180:                    Boolean secure) {
181:                return info.getBase(secure);
182:            }
183:
184:            /**
185:             * Add one event to the buffer
186:             * @return Returns true, if the link contains a parameter
187:             */
188:            protected boolean addEvent(StringBuffer buffer, Event event,
189:                    boolean hasParams) {
190:                if (hasParams) {
191:                    buffer.append('&');
192:                } else {
193:                    buffer.append('?');
194:                }
195:                StringBuffer value = new StringBuffer("");
196:                String parameterName = processEvent(event, value);
197:                try {
198:                    buffer.append(parameterName).append('=').append(
199:                            NetUtils.encode(value.toString(), "utf-8"));
200:                } catch (UnsupportedEncodingException uee) {
201:                    // ignore this as utf-8 is always supported
202:                }
203:                return true;
204:            }
205:
206:            /**
207:             * @see org.apache.cocoon.portal.LinkService#getLinkURI(java.util.List)
208:             */
209:            public String getLinkURI(List events) {
210:                return this .getLinkURI(events, null);
211:            }
212:
213:            /**
214:             * @see org.apache.cocoon.portal.LinkService#getLinkURI(java.util.List)
215:             */
216:            public String getLinkURI(List events, Boolean secure) {
217:                if (events == null || events.size() == 0) {
218:                    return this .getRefreshLinkURI(secure);
219:                }
220:                final LinkInfo info = this .getInfo();
221:                boolean hasParams = info.hasParameters();
222:                final StringBuffer buffer = new StringBuffer(initBuffer(info,
223:                        events, secure));
224:
225:                // add comparable events
226:                Iterator iter = info.comparableEvents.iterator();
227:                while (iter.hasNext()) {
228:                    Object[] objects = (Object[]) iter.next();
229:                    ComparableEvent current = (ComparableEvent) objects[0];
230:
231:                    Iterator eventIterator = events.iterator();
232:                    boolean found = false;
233:                    while (!found && eventIterator.hasNext()) {
234:                        final Object inEvent = eventIterator.next();
235:                        if (inEvent instanceof  ComparableEvent
236:                                && current
237:                                        .equalsEvent((ComparableEvent) inEvent)) {
238:                            found = true;
239:                        }
240:                    }
241:                    if (!found) {
242:                        if (hasParams) {
243:                            buffer.append('&');
244:                        } else {
245:                            buffer.append('?');
246:                        }
247:                        try {
248:                            buffer.append((String) objects[1]).append('=')
249:                                    .append(
250:                                            NetUtils.encode(
251:                                                    (String) objects[2],
252:                                                    "utf-8"));
253:                        } catch (UnsupportedEncodingException uee) {
254:                            // ignore this as utf-8 is always supported
255:                        }
256:                        hasParams = true;
257:                    }
258:                }
259:
260:                // now add events
261:                iter = events.iterator();
262:                while (iter.hasNext()) {
263:                    final Object current = iter.next();
264:                    if (current instanceof  Event) {
265:                        hasParams = this .addEvent(buffer, (Event) current,
266:                                hasParams);
267:                    } else if (current instanceof  ParameterDescription) {
268:                        if (hasParams) {
269:                            buffer.append('&');
270:                        } else {
271:                            buffer.append('?');
272:                            hasParams = true;
273:                        }
274:                        buffer
275:                                .append(((ParameterDescription) current).parameters);
276:                    }
277:                }
278:                return buffer.toString();
279:            }
280:
281:            protected String initBuffer(LinkInfo info, List events,
282:                    Boolean secure) {
283:                return info.getBase(secure);
284:            }
285:
286:            /**
287:             * @see org.apache.cocoon.portal.LinkService#addEventToLink(org.apache.cocoon.portal.event.Event)
288:             */
289:            public void addEventToLink(Event event) {
290:                if (event == null) {
291:                    return;
292:                }
293:                StringBuffer value = new StringBuffer("");
294:                String parameterName = processEvent(event, value);
295:
296:                final LinkInfo info = this .getInfo();
297:                if (event instanceof  ComparableEvent) {
298:                    // search if we already have an event for this!
299:                    final Iterator iter = info.comparableEvents.iterator();
300:                    boolean found = false;
301:                    while (!found && iter.hasNext()) {
302:                        Object[] objects = (Object[]) iter.next();
303:                        if (((ComparableEvent) objects[0])
304:                                .equalsEvent((ComparableEvent) event)) {
305:                            found = true;
306:                            info.comparableEvents.remove(objects);
307:                        }
308:                    }
309:                    info.comparableEvents.add(new Object[] { event,
310:                            parameterName, value.toString() });
311:                } else {
312:                    this .addParameterToLink(parameterName, value.toString());
313:                }
314:            }
315:
316:            /**
317:             * @see org.apache.cocoon.portal.LinkService#addParameterToLink(java.lang.String, java.lang.String)
318:             */
319:            public void addParameterToLink(String name, String value) {
320:                final LinkInfo info = this .getInfo();
321:                info.addParameterToBase(name, value);
322:            }
323:
324:            /**
325:             * @see org.apache.cocoon.portal.LinkService#addUniqueParameterToLink(java.lang.String, java.lang.String)
326:             */
327:            public void addUniqueParameterToLink(String name, String value) {
328:                final LinkInfo info = this .getInfo();
329:                info.deleteParameterFromBase(name);
330:                this .addParameterToLink(name, value);
331:            }
332:
333:            /**
334:             * @see org.apache.cocoon.portal.LinkService#getRefreshLinkURI()
335:             */
336:            public String getRefreshLinkURI() {
337:                return this .getRefreshLinkURI(null);
338:            }
339:
340:            /**
341:             * @see org.apache.cocoon.portal.LinkService#getRefreshLinkURI(java.lang.Boolean)
342:             */
343:            public String getRefreshLinkURI(Boolean secure) {
344:                final LinkInfo info = this .getInfo();
345:
346:                final StringBuffer buffer = new StringBuffer(info
347:                        .getBase(secure));
348:
349:                // add comparable events
350:                Iterator iter = info.comparableEvents.iterator();
351:                boolean hasParams = info.hasParameters();
352:                while (iter.hasNext()) {
353:                    Object[] objects = (Object[]) iter.next();
354:                    if (hasParams) {
355:                        buffer.append('&');
356:                    } else {
357:                        buffer.append('?');
358:                    }
359:                    try {
360:                        buffer.append((String) objects[1]).append('=').append(
361:                                NetUtils.encode((String) objects[2], "utf-8"));
362:                    } catch (UnsupportedEncodingException uee) {
363:                        // ignore this as utf-8 is always supported
364:                    }
365:                    hasParams = true;
366:                }
367:                return buffer.toString();
368:            }
369:
370:            /**
371:             * @see org.apache.avalon.framework.activity.Disposable#dispose()
372:             */
373:            public void dispose() {
374:                if (this .manager != null) {
375:                    this .manager.release(this .converter);
376:                    this .converter = null;
377:                    this .manager = null;
378:                }
379:            }
380:
381:            /**
382:             * @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
383:             */
384:            public void contextualize(Context context) throws ContextException {
385:                this .context = context;
386:            }
387:
388:            private boolean getEventsMarshalled() {
389:                if (this .eventsMarshalled == null) {
390:                    this .eventsMarshalled = new Boolean(this .converter
391:                            .isMarshallEvents());
392:                }
393:                return this .eventsMarshalled.booleanValue();
394:            }
395:
396:            protected String processEvent(Event event, StringBuffer value) {
397:                String parameterName = DEFAULT_REQUEST_EVENT_PARAMETER_NAME;
398:                if (event instanceof  ConvertableEvent && getEventsMarshalled()) {
399:                    final String eventParName = ((ConvertableEvent) event)
400:                            .getRequestParameterName();
401:                    String eventStr = ((ConvertableEvent) event).asString();
402:                    if (eventStr == null) {
403:                        // Could not convert the event
404:                        value.append(this .converter.encode(event));
405:                    } else {
406:                        parameterName = DEFAULT_CONVERTABLE_EVENT_PARAMETER_NAME;
407:                        try {
408:                            String eventValue = NetUtils.encode(eventStr,
409:                                    "utf-8");
410:                            value.append(eventParName).append('(').append(
411:                                    eventValue).append(')');
412:                        } catch (UnsupportedEncodingException uee) {
413:                            // ignore this as utf-8 is always supported
414:                        }
415:                    }
416:                } else {
417:                    if (event instanceof  RequestEvent) {
418:                        final String eventParName = ((RequestEvent) event)
419:                                .getRequestParameterName();
420:                        if (eventParName != null) {
421:                            parameterName = eventParName;
422:                        }
423:                    }
424:                    value.append(this.converter.encode(event));
425:                }
426:                return parameterName;
427:            }
428:        }
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