Source Code Cross Referenced for URICopletAdapter.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » portal » coplet » adapter » 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.coplet.adapter.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.coplet.adapter.impl;
018:
019:        import java.io.IOException;
020:        import java.util.ArrayList;
021:        import java.util.HashMap;
022:        import java.util.List;
023:        import java.util.Map;
024:
025:        import org.apache.avalon.framework.activity.Disposable;
026:        import org.apache.avalon.framework.activity.Initializable;
027:        import org.apache.avalon.framework.context.Context;
028:        import org.apache.avalon.framework.context.ContextException;
029:        import org.apache.avalon.framework.context.Contextualizable;
030:        import org.apache.avalon.framework.service.ServiceException;
031:        import org.apache.avalon.framework.service.ServiceManager;
032:        import org.apache.cocoon.ProcessingException;
033:        import org.apache.cocoon.components.ContextHelper;
034:        import org.apache.cocoon.components.notification.Notifying;
035:        import org.apache.cocoon.components.notification.NotifyingBuilder;
036:        import org.apache.cocoon.components.source.SourceUtil;
037:        import org.apache.cocoon.environment.ObjectModelHelper;
038:        import org.apache.cocoon.portal.Constants;
039:        import org.apache.cocoon.portal.PortalService;
040:        import org.apache.cocoon.portal.coplet.CopletInstanceData;
041:        import org.apache.cocoon.portal.event.CopletInstanceEvent;
042:        import org.apache.cocoon.portal.event.EventManager;
043:        import org.apache.cocoon.portal.event.Receiver;
044:        import org.apache.excalibur.source.Source;
045:        import org.apache.excalibur.source.SourceResolver;
046:        import org.xml.sax.ContentHandler;
047:        import org.xml.sax.SAXException;
048:
049:        /**
050:         * This is the adapter to use pipelines as coplets
051:         *
052:         * @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
053:         * @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
054:         * 
055:         * @version CVS $Id: URICopletAdapter.java 433543 2006-08-22 06:22:54Z crossley $
056:         */
057:        public class URICopletAdapter extends AbstractCopletAdapter implements 
058:                Disposable, Receiver, Initializable, Contextualizable {
059:
060:            /** The source resolver */
061:            protected SourceResolver resolver;
062:
063:            /** The application context */
064:            protected Context context;
065:
066:            /**
067:             * @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
068:             */
069:            public void contextualize(Context context) throws ContextException {
070:                this .context = context;
071:            }
072:
073:            /**
074:             * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
075:             */
076:            public void service(ServiceManager manager) throws ServiceException {
077:                super .service(manager);
078:                this .resolver = (SourceResolver) this .manager
079:                        .lookup(SourceResolver.ROLE);
080:            }
081:
082:            /**
083:             * @see org.apache.cocoon.portal.coplet.adapter.impl.AbstractCopletAdapter#streamContent(org.apache.cocoon.portal.coplet.CopletInstanceData, org.xml.sax.ContentHandler)
084:             */
085:            public void streamContent(CopletInstanceData coplet,
086:                    ContentHandler contentHandler) throws SAXException {
087:                final String uri = (String) coplet.getCopletData()
088:                        .getAttribute("uri");
089:                if (uri == null) {
090:                    throw new SAXException("No URI for coplet data "
091:                            + coplet.getCopletData().getId() + " found.");
092:                }
093:                this .streamContent(coplet, uri, contentHandler);
094:            }
095:
096:            public void streamContent(final CopletInstanceData coplet,
097:                    final String uri, final ContentHandler contentHandler)
098:                    throws SAXException {
099:                Source copletSource = null;
100:                PortalService portalService = null;
101:                try {
102:                    if (uri.startsWith("cocoon:")) {
103:                        portalService = (PortalService) this .manager
104:                                .lookup(PortalService.ROLE);
105:
106:                        Boolean handlePars = (Boolean) this .getConfiguration(
107:                                coplet, "handleParameters", Boolean.FALSE);
108:
109:                        String sourceUri = uri;
110:
111:                        if (handlePars.booleanValue()) {
112:                            List list = (List) portalService
113:                                    .getTemporaryAttribute(URICopletAdapter.class
114:                                            .getName());
115:                            if (list != null && list.contains(coplet)) {
116:                                // add parameters
117:                                if (uri.startsWith("cocoon:raw:")) {
118:                                    sourceUri = "cocoon:" + uri.substring(11);
119:                                }
120:                            } else {
121:                                // remove parameters
122:                                if (!uri.startsWith("cocoon:raw:")) {
123:                                    sourceUri = "cocoon:raw:"
124:                                            + uri.substring(7);
125:                                }
126:                            }
127:                        }
128:
129:                        HashMap par = new HashMap();
130:                        par.put(Constants.PORTAL_NAME_KEY, portalService
131:                                .getPortalName());
132:                        par.put(Constants.COPLET_ID_KEY, coplet.getId());
133:
134:                        copletSource = this .resolver.resolveURI(sourceUri,
135:                                null, par);
136:                    } else {
137:                        copletSource = this .resolver.resolveURI(uri);
138:                    }
139:                    SourceUtil.toSAX(copletSource, contentHandler);
140:                } catch (IOException ioe) {
141:                    throw new SAXException("IOException", ioe);
142:                } catch (ProcessingException pe) {
143:                    throw new SAXException("ProcessingException", pe);
144:                } catch (ServiceException ce) {
145:                    throw new SAXException("ServiceException", ce);
146:                } finally {
147:                    this .resolver.release(copletSource);
148:                    this .manager.release(portalService);
149:                }
150:            }
151:
152:            /**
153:             * @see org.apache.avalon.framework.activity.Disposable#dispose()
154:             */
155:            public void dispose() {
156:                if (this .manager != null) {
157:                    EventManager eventManager = null;
158:                    try {
159:                        eventManager = (EventManager) this .manager
160:                                .lookup(EventManager.ROLE);
161:                        eventManager.unsubscribe(this );
162:                    } catch (Exception ignore) {
163:                        // ignore
164:                    } finally {
165:                        this .manager.release(eventManager);
166:                    }
167:
168:                    this .manager.release(this .resolver);
169:                    this .resolver = null;
170:                    this .manager = null;
171:                }
172:            }
173:
174:            /**
175:             * @see Receiver
176:             */
177:            public void inform(CopletInstanceEvent event, PortalService service) {
178:                List list = (List) service
179:                        .getTemporaryAttribute(URICopletAdapter.class.getName());
180:                if (list == null) {
181:                    list = new ArrayList();
182:                }
183:                if (!list.contains(event.getTarget())) {
184:                    list.add(event.getTarget());
185:                }
186:                service.setTemporaryAttribute(URICopletAdapter.class.getName(),
187:                        list);
188:            }
189:
190:            /**
191:             * @see org.apache.avalon.framework.activity.Initializable#initialize()
192:             */
193:            public void initialize() throws Exception {
194:                EventManager eventManager = null;
195:                try {
196:                    eventManager = (EventManager) this .manager
197:                            .lookup(EventManager.ROLE);
198:                    eventManager.subscribe(this );
199:                } finally {
200:                    this .manager.release(eventManager);
201:                }
202:            }
203:
204:            /**
205:             * Render the error content for a coplet
206:             * @param coplet  The coplet instance data
207:             * @param handler The content handler
208:             * @param error   The exception that occured
209:             * @return True if the error content has been rendered, otherwise false
210:             * @throws SAXException
211:             */
212:            protected boolean renderErrorContent(CopletInstanceData coplet,
213:                    ContentHandler handler, Exception error)
214:                    throws SAXException {
215:                final String uri = (String) this .getConfiguration(coplet,
216:                        "error-uri");
217:                if (uri != null) {
218:                    // TODO - if an error occured for this coplet, remember this
219:                    //         and use directly the error-uri from now on
220:
221:                    if (uri.startsWith("cocoon:") && error != null) {
222:                        // Create a Notifying
223:                        NotifyingBuilder notifyingBuilder = null;
224:                        Notifying currentNotifying = null;
225:                        try {
226:                            notifyingBuilder = (NotifyingBuilder) this .manager
227:                                    .lookup(NotifyingBuilder.ROLE);
228:                            currentNotifying = notifyingBuilder.build(this ,
229:                                    error);
230:                        } catch (Exception ignore) {
231:                            // ignore
232:                        } finally {
233:                            this .manager.release(notifyingBuilder);
234:                        }
235:
236:                        final Map objectModel = ContextHelper
237:                                .getObjectModel(this .context);
238:                        // Add it to the object model
239:                        if (currentNotifying != null) {
240:                            objectModel
241:                                    .put(
242:                                            org.apache.cocoon.Constants.NOTIFYING_OBJECT,
243:                                            currentNotifying);
244:                            objectModel.put(ObjectModelHelper.THROWABLE_OBJECT,
245:                                    error);
246:                        }
247:
248:                        try {
249:                            this .streamContent(coplet, uri, handler);
250:                        } finally {
251:                            objectModel
252:                                    .remove(org.apache.cocoon.Constants.NOTIFYING_OBJECT);
253:                            objectModel
254:                                    .remove(ObjectModelHelper.THROWABLE_OBJECT);
255:                        }
256:                    } else {
257:
258:                        this .streamContent(coplet, uri, handler);
259:                    }
260:
261:                    return true;
262:                }
263:                return false;
264:            }
265:        }
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