Source Code Cross Referenced for RequestGenerator.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » generation » 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.generation 
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.generation;
018:
019:        import java.io.IOException;
020:        import java.io.StringReader;
021:        import java.io.UnsupportedEncodingException;
022:        import java.util.Enumeration;
023:        import java.util.Map;
024:
025:        import org.apache.avalon.framework.CascadingRuntimeException;
026:        import org.apache.avalon.framework.parameters.ParameterException;
027:        import org.apache.avalon.framework.parameters.Parameterizable;
028:        import org.apache.avalon.framework.parameters.Parameters;
029:        import org.apache.cocoon.ProcessingException;
030:        import org.apache.cocoon.environment.ObjectModelHelper;
031:        import org.apache.cocoon.environment.Request;
032:        import org.apache.cocoon.environment.SourceResolver;
033:        import org.apache.cocoon.xml.XMLUtils;
034:        import org.apache.cocoon.xml.IncludeXMLConsumer;
035:        import org.apache.excalibur.xml.sax.SAXParser;
036:        import org.xml.sax.InputSource;
037:        import org.xml.sax.SAXException;
038:        import org.xml.sax.helpers.AttributesImpl;
039:
040:        /**
041:         * @cocoon.sitemap.component.documentation
042:         * Generates an XML representation of the incoming request.
043:         * 
044:         * @cocoon.sitemap.component.name   request
045:         * @cocoon.sitemap.component.label  content
046:         * @cocoon.sitemap.component.logger sitemap.generator.request
047:         * 
048:         * @cocoon.sitemap.component.pooling.max  16
049:         * 
050:         * <p>
051:         * <b>Configuration options:</b>
052:         * <dl>
053:         * <dt> <i>container-encoding</i> (optional)
054:         * <dd> The encoding used by container. Default value is ISO-8859-1.
055:         * <dt> <i>form-encoding</i> (optional)
056:         * <dd> The supposed encoding of the request parameter. Default is null.
057:         * <dt> <i>generate-attributes</i> (optional)
058:         * <dd> If true, request attributes were also included. Default is false.
059:         * </dl>
060:         * These configuration options are supported at both declaration and use time.
061:         * The configuration at use time takes priority over declaration time.
062:         *
063:         * @author <a href="mailto:pier@apache.org">Pierpaolo Fumagalli</a>
064:         * @author <a href="mailto:Giacomo.Pati@pwr.ch">Giacomo Pati</a>
065:         * @author <a href="mailto:vgritsenko@apache.org">Vadim Gritsenko</a>
066:         * @author <a href="mailto:stefano@apache.org">Stefano Mazzocchi</a>
067:         * @version CVS $Id: RequestGenerator.java 433543 2006-08-22 06:22:54Z crossley $
068:         */
069:        public class RequestGenerator extends ServiceableGenerator implements 
070:                Parameterizable {
071:
072:            /** The namespace prefix of this generator. */
073:            private final static String PREFIX = "h";
074:            /** The namespace URI of this generator. */
075:            private final static String URI = "http://apache.org/cocoon/request/2.0";
076:
077:            /** The configured container encoding at declaration time. */
078:            private String global_container_encoding;
079:            /** The configured container encoding at use time. */
080:            private String container_encoding;
081:
082:            /** The configured form encoding at declaration time. */
083:            private String global_form_encoding;
084:            /** The configured form encoding at use time. */
085:            private String form_encoding;
086:
087:            /** The configuration for including request attributes at declaration time. */
088:            private boolean global_generate_attributes;
089:            /** The configuration for including request attributes at use time. */
090:            private boolean generate_attributes;
091:
092:            public void parameterize(Parameters parameters)
093:                    throws ParameterException {
094:                global_container_encoding = parameters.getParameter(
095:                        "container-encoding", "ISO-8859-1");
096:                global_form_encoding = parameters.getParameter("form-encoding",
097:                        null);
098:                global_generate_attributes = parameters.getParameterAsBoolean(
099:                        "generate-attributes", false);
100:            }
101:
102:            public void setup(SourceResolver resolver, Map objectModel,
103:                    String src, Parameters parameters)
104:                    throws ProcessingException, SAXException, IOException {
105:                super .setup(resolver, objectModel, src, parameters);
106:                container_encoding = parameters.getParameter(
107:                        "container-encoding", global_container_encoding);
108:                form_encoding = parameters.getParameter("form-encoding",
109:                        global_form_encoding);
110:                generate_attributes = parameters.getParameterAsBoolean(
111:                        "generate-attributes", global_generate_attributes);
112:            }
113:
114:            /**
115:             * Generate XML data.
116:             */
117:            public void generate() throws SAXException {
118:                final Request request = ObjectModelHelper
119:                        .getRequest(objectModel);
120:                final AttributesImpl attr = new AttributesImpl();
121:
122:                this .contentHandler.startDocument();
123:                this .contentHandler.startPrefixMapping(PREFIX, URI);
124:
125:                attribute(attr, "target", request.getRequestURI());
126:                attribute(attr, "sitemap", request.getSitemapURI());
127:                attribute(attr, "source", (this .source != null ? this .source
128:                        : ""));
129:                start("request", attr);
130:
131:                start("requestHeaders", attr);
132:                Enumeration headers = request.getHeaderNames();
133:                if (headers != null) {
134:                    while (headers.hasMoreElements()) {
135:                        String header = (String) headers.nextElement();
136:                        attribute(attr, "name", header);
137:                        start("header", attr);
138:                        data(request.getHeader(header));
139:                        end("header");
140:                    }
141:                }
142:                end("requestHeaders");
143:
144:                start("requestParameters", attr);
145:                Enumeration parameters = request.getParameterNames();
146:                while (parameters.hasMoreElements()) {
147:                    String parameter = (String) parameters.nextElement();
148:                    attribute(attr, "name", parameter);
149:                    start("parameter", attr);
150:                    String values[] = request.getParameterValues(parameter);
151:                    if (values != null) {
152:                        for (int x = 0; x < values.length; x++) {
153:                            start("value", attr);
154:                            if (form_encoding != null) {
155:                                try {
156:                                    data(values[x], container_encoding,
157:                                            form_encoding);
158:                                } catch (UnsupportedEncodingException uee) {
159:                                    throw new CascadingRuntimeException(
160:                                            "The suggested encoding is not supported.",
161:                                            uee);
162:                                }
163:                            } else if (parameter.startsWith("xml:")) {
164:                                try {
165:                                    parse(values[x]);
166:                                } catch (Exception e) {
167:                                    throw new CascadingRuntimeException(
168:                                            "Could not parse the xml parameter",
169:                                            e);
170:                                }
171:                            } else {
172:                                data(values[x]);
173:                            }
174:                            end("value");
175:                        }
176:                    }
177:                    end("parameter");
178:                }
179:                end("requestParameters");
180:
181:                if (generate_attributes) {
182:                    start("requestAttributes", attr);
183:                    Enumeration attributes = request.getAttributeNames();
184:                    while (attributes.hasMoreElements()) {
185:                        String attribute = (String) attributes.nextElement();
186:                        attribute(attr, "name", attribute);
187:                        start("attribute", attr);
188:                        Object value = request.getAttribute(attribute);
189:                        if (value != null) {
190:                            start("value", attr);
191:                            XMLUtils.valueOf(this .contentHandler, value);
192:                            end("value");
193:                        }
194:                        end("attribute");
195:                    }
196:                    end("requestAttributes");
197:                }
198:
199:                this .start("configurationParameters", attr);
200:                String[] confparams = super .parameters.getNames();
201:                for (int i = 0; i < confparams.length; i++) {
202:                    attribute(attr, "name", confparams[i]);
203:                    start("parameter", attr);
204:                    data(super .parameters.getParameter(confparams[i], ""));
205:                    end("parameter");
206:                }
207:                end("configurationParameters");
208:
209:                start("remoteUser", attr);
210:                if (request.getRemoteUser() != null) {
211:                    data(request.getRemoteUser());
212:                }
213:                end("remoteUser");
214:
215:                end("request");
216:
217:                this .contentHandler.endPrefixMapping(PREFIX);
218:                this .contentHandler.endDocument();
219:            }
220:
221:            private void attribute(AttributesImpl attr, String name,
222:                    String value) {
223:                attr.addAttribute("", name, name, "CDATA", value);
224:            }
225:
226:            private void start(String name, AttributesImpl attr)
227:                    throws SAXException {
228:                super .contentHandler.startElement(URI, name, PREFIX + ":"
229:                        + name, attr);
230:                attr.clear();
231:            }
232:
233:            private void end(String name) throws SAXException {
234:                super .contentHandler.endElement(URI, name, PREFIX + ":" + name);
235:            }
236:
237:            private void data(String data) throws SAXException {
238:                super .contentHandler.characters(data.toCharArray(), 0, data
239:                        .length());
240:            }
241:
242:            private void data(String data, String container_encoding,
243:                    String form_encoding) throws SAXException,
244:                    UnsupportedEncodingException {
245:                this .data(new String(data.getBytes(container_encoding),
246:                        form_encoding));
247:            }
248:
249:            private void parse(String data) throws Exception {
250:                SAXParser parser = null;
251:                try {
252:                    parser = (SAXParser) manager.lookup(SAXParser.ROLE);
253:                    InputSource is = new InputSource(new StringReader(data));
254:                    parser.parse(is, new IncludeXMLConsumer(super.xmlConsumer));
255:                } finally {
256:                    manager.release(parser);
257:                }
258:            }
259:        }
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