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16 package org.apache.cocoon.portal.transformation;
17
18 import java.io.IOException  ;
19 import java.util.ArrayList ;
20 import java.util.Enumeration ;
21 import java.util.List ;
22
23 import org.apache.cocoon.ProcessingException;
24 import org.apache.cocoon.environment.wrapper.RequestParameters;
25 import org.apache.cocoon.portal.LinkService;
26 import org.apache.cocoon.portal.coplet.CopletInstanceData;
27 import org.apache.cocoon.portal.event.impl.ChangeCopletInstanceAspectDataEvent;
28 import org.apache.cocoon.portal.event.impl.CopletJXPathEvent;
29 import org.apache.cocoon.portal.event.impl.JXPathEvent;
30 import org.apache.cocoon.xml.AttributesImpl;
31 import org.apache.cocoon.xml.XMLUtils;
32 import org.apache.commons.jxpath.JXPathContext;
33 import org.apache.excalibur.xml.sax.XMLizable;
34 import org.xml.sax.Attributes ;
35 import org.xml.sax.SAXException ;
36
37
59 public class CopletTransformer
60 extends AbstractCopletTransformer {
61
62
65 public static final String NAMESPACE_URI = "http://apache.org/cocoon/portal/coplet/1.0";
66
67
70 public static final String COPLET_ELEM = "coplet";
71
72
75 public static final String SELECT_ATTR = "select";
76
77
78
81 public static final String LINK_ELEM = "link";
82
83
84 public static final String LINKS_ELEM = "links";
85
86
87 public static final String PARAMETER_ELEM = "parameter";
88
89
90 public static final String CONTENT_ELEM = "content";
91
92
93 protected boolean insideLinks;
94
95
96 protected List collectedEvents = new ArrayList ();
97
98
99 protected XMLizable content;
100
101
104 public CopletTransformer() {
105 this.defaultNamespaceURI = NAMESPACE_URI;
106 }
107
108
111 public void setupTransforming()
112 throws IOException , ProcessingException, SAXException {
113 super.setupTransforming();
114 this.insideLinks = false;
115 this.content = null;
116 this.collectedEvents.clear();
117 }
118
119
122 public void startTransformingElement(String uri, String name, String raw, Attributes attr)
123 throws ProcessingException, IOException , SAXException {
124 if (name.equals(COPLET_ELEM)) {
125 String expression = attr.getValue(SELECT_ATTR);
126 if (expression == null) {
127 throw new ProcessingException("Attribute "+SELECT_ATTR+" must be spcified.");
128 }
129
130 final CopletInstanceData cid = this.getCopletInstanceData();
131
132 final JXPathContext jxpathContext = JXPathContext.newContext( cid );
133 final Object object = jxpathContext.getValue(expression);
134
135 if (object != null) {
136 XMLUtils.valueOf(contentHandler, object);
137 }
138
139 } else if (name.equals(LINK_ELEM)) {
140
141 final LinkService linkService = this.portalService.getComponentManager().getLinkService();
142 final String format = attr.getValue("format");
143 AttributesImpl newAttrs = new AttributesImpl();
144 newAttrs.setAttributes(attr);
145 newAttrs.removeAttribute("format");
146
147 if ( attr.getValue("href") != null ) {
148 final CopletInstanceData cid = this.getCopletInstanceData();
149 ChangeCopletInstanceAspectDataEvent event = new ChangeCopletInstanceAspectDataEvent(cid, null, null);
150
151 String value = linkService.getLinkURI(event);
152 if (value.indexOf('?') == -1) {
153 value = value + '?' + attr.getValue("href");
154 } else {
155 value = value + '&' + attr.getValue("href");
156 }
157 newAttrs.removeAttribute("href");
158 this.output(value, format, newAttrs );
159 } else {
160 final String path = attr.getValue("path");
161 final String value = attr.getValue("value");
162
163 newAttrs.removeAttribute("path");
164 newAttrs.removeAttribute("value");
165
166 JXPathEvent event = null;
167 if ( attr.getValue("layout") != null ) {
168 newAttrs.removeAttribute("layout");
169 final String layoutId = attr.getValue("layout");
170 Object layout = this.portalService.getComponentManager().getProfileManager().getPortalLayout(null, layoutId);
171 if ( layout != null ) {
172 event = new JXPathEvent(layout, path, value);
173 }
174 } else {
175 String copletId = attr.getValue("coplet");
176 newAttrs.removeAttribute("coplet");
177 final CopletInstanceData cid = this.getCopletInstanceData(copletId);
178 if ( cid != null ) {
179 event = new CopletJXPathEvent(cid, path, value);
180 }
181 }
182 if ( this.insideLinks ) {
183 if ( event != null ) {
184 this.collectedEvents.add(event);
185 }
186 } else {
187 final String href = linkService.getLinkURI(event);
188 this.output(href, format, newAttrs );
189 }
190 }
191 } else if (name.equals(PARAMETER_ELEM)) {
192 if (this.insideLinks) {
193 String href = attr.getValue("href");
194 if ( href != null ) {
195 final int pos = href.indexOf('?');
196 if ( pos != -1 ) {
197 href = href.substring(pos+1);
198 }
199 this.collectedEvents.add(new LinkService.ParameterDescription(href));
200 }
201 }
202 } else if (name.equals(LINKS_ELEM) ) {
203 this.insideLinks = true;
204 final AttributesImpl newAttrs = new AttributesImpl();
205 newAttrs.setAttributes(attr);
206 newAttrs.removeAttribute("format");
207 this.stack.push(newAttrs);
208
209 String format = attr.getValue("format");
210 if ( format == null ) {
211 format = "html-link";
212 }
213 this.stack.push(format);
214 } else if ( name.equals(CONTENT_ELEM) && this.insideLinks ) {
215 this.startSAXRecording();
216 } else {
217 super.startTransformingElement(uri, name, raw, attr);
218 }
219 }
220
221
224 public void endTransformingElement(String uri, String name, String raw)
225 throws ProcessingException, IOException , SAXException {
226 if ( name.equals(LINK_ELEM) ) {
227 if ( !this.insideLinks ) {
228 String elem = (String )this.stack.pop();
229 if ( elem.length() > 0 ) {
230 this.sendEndElementEvent(elem);
231 }
232 }
233 } else if ( name.equals(LINKS_ELEM) ) {
234 this.insideLinks = false;
235 final String format = (String )this.stack.pop();
236 final LinkService linkService = this.portalService.getComponentManager().getLinkService();
237 String href = linkService.getLinkURI(this.collectedEvents);
238
239 AttributesImpl newAttrs = (AttributesImpl)this.stack.pop();
240 final String baseURL = newAttrs.getValue("base-url");
242 if ( baseURL != null ) {
243 newAttrs.removeAttribute("base-url");
244 int pos = href.indexOf('?') + 1;
245 final char separator;
246 if ( baseURL.indexOf('?') == -1 ) {
247 separator = '?';
248 } else {
249 separator = '&';
250 }
251 href = baseURL + separator + href.substring(pos);
252
253 }
254 this.output(href, format, newAttrs );
255
256 this.collectedEvents.clear();
257 if ( this.content != null ) {
258 this.content.toSAX(this.contentHandler);
259 this.content = null;
260 }
261 String elem = (String )this.stack.pop();
262 if ( elem.length() > 0 ) {
263 this.sendEndElementEvent(elem);
264 }
265 } else if ( name.equals(CONTENT_ELEM) && this.insideLinks ) {
266 this.content = this.endSAXRecording();
267 } else if (!name.equals(COPLET_ELEM) && !name.equals(PARAMETER_ELEM)) {
268 super.endTransformingElement(uri, name, raw);
269 }
270 }
271
272
275 protected void output(String uri, String format, AttributesImpl newAttrs)
276 throws SAXException {
277 if ( format == null ) {
278 format = "html-link";
280 }
281
282 if ( "html-link".equals(format) ) {
283 newAttrs.addCDATAAttribute("href", uri);
284 this.sendStartElementEvent("a", newAttrs);
285 this.stack.push("a");
286
287 } else if ( "html-form".equals(format) ) {
288 boolean addParametersAsHiddenFields = false;
289 String parameters = null;
290 final String enctype = newAttrs.getValue("enctype");
291 if ( enctype== null
292 || "application/x-www-form-urlencoded".equalsIgnoreCase(enctype)
293 || "multipart/form-data".equalsIgnoreCase(enctype) ) {
294 final int pos = uri.indexOf('?');
295 if ( pos != -1 ) {
296 parameters = uri.substring(pos+1);
297 uri = uri.substring(0, pos);
298 addParametersAsHiddenFields = true;
299 }
300 }
301 newAttrs.addCDATAAttribute("action", uri);
302 this.sendStartElementEvent("form", newAttrs);
303 this.stack.push("form");
304 if ( addParametersAsHiddenFields ) {
305 RequestParameters pars = new RequestParameters(parameters);
307 Enumeration enumeration = pars.getParameterNames();
308 while ( enumeration.hasMoreElements() ) {
309 final String pName = (String )enumeration.nextElement();
310 final String [] pValues = pars.getParameterValues(pName);
311 for(int k=0; k<pValues.length; k++) {
312 final String pValue = pValues[k];
313 AttributesImpl hiddenAttrs = new AttributesImpl();
314 hiddenAttrs.addCDATAAttribute("type", "hidden");
315 hiddenAttrs.addCDATAAttribute("name", pName);
316 hiddenAttrs.addCDATAAttribute("value", pValue);
317 this.startElement("", "input", "input", hiddenAttrs);
318 this.endElement("", "input", "input");
319 }
320 }
321
322 }
323 } else if ( "text".equals(format) ) {
324 this.sendTextEvent(uri);
325 this.stack.push("");
326 } else if ( "parameters".equals(format) ) {
327 final String value = uri.substring(uri.indexOf('?')+1);
328 this.sendTextEvent(value);
329 this.stack.push("");
330 } else {
331 newAttrs.addCDATAAttribute("href", uri);
333 this.sendStartElementEvent("link", newAttrs);
334 this.stack.push("link");
335 }
336 }
337 }
338 |
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