source: main/trunk/greenstone3/src/java/org/greenstone/gsdl3/action/DocumentAction.java@ 25953

Last change on this file since 25953 was 25953, checked in by sjm84, 12 years ago

Reformatting this file and removing two debug statements
  • Property svn:keywords set to Author Date Id Revision
File size: 42.2 KB
Line 
1/*
2 * DocumentAction.java
3 * Copyright (C) 2002 New Zealand Digital Library, http://www.nzdl.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19package org.greenstone.gsdl3.action;
20
21// Greenstone classes
22import org.greenstone.gsdl3.core.ModuleInterface;
23import org.greenstone.gsdl3.util.*;
24
25// XML classes
26import org.w3c.dom.Document;
27import org.w3c.dom.Element;
28import org.w3c.dom.Node;
29import org.w3c.dom.Text;
30import org.w3c.dom.NodeList;
31
32// General Java classes
33import java.util.ArrayList;
34import java.util.HashMap;
35import java.util.HashSet;
36import java.io.File;
37import java.io.Serializable;
38
39import org.apache.log4j.*;
40
41/** Action class for retrieving Documents via the message router */
42public class DocumentAction extends Action
43{
44
45 static Logger logger = Logger.getLogger(org.greenstone.gsdl3.action.DocumentAction.class.getName());
46
47 // this is used to specify that the sibling nodes of a selected one should be obtained
48 public static final String SIBLING_ARG = "sib";
49 public static final String GOTO_PAGE_ARG = "gp";
50 public static final String ENRICH_DOC_ARG = "end";
51 public static final String EXPAND_DOCUMENT_ARG = "ed";
52 public static final String EXPAND_CONTENTS_ARG = "ec";
53 public static final String REALISTIC_BOOK_ARG = "book";
54
55 /**
56 * if this is set to true, when a document is displayed, any annotation type
57 * services (enrich) will be offered to the user as well
58 */
59 protected boolean provide_annotations = false;
60
61 protected boolean highlight_query_terms = false;
62
63 public boolean configure()
64 {
65 super.configure();
66 String highlight = (String) config_params.get("highlightQueryTerms");
67 if (highlight != null && highlight.equals("true"))
68 {
69 highlight_query_terms = true;
70 }
71 String annotate = (String) config_params.get("displayAnnotationService");
72 if (annotate != null && annotate.equals("true"))
73 {
74 provide_annotations = true;
75 }
76 return true;
77 }
78
79 public Node process(Node message_node)
80 {
81 // for now, no subaction eventually we may want to have subactions such as text assoc or something ?
82
83 Element message = this.converter.nodeToElement(message_node);
84
85 // the response
86 Element result = this.doc.createElement(GSXML.MESSAGE_ELEM);
87 Element page_response = this.doc.createElement(GSXML.RESPONSE_ELEM);
88 result.appendChild(page_response);
89
90 // get the request - assume only one
91 Element request = (Element) GSXML.getChildByTagName(message, GSXML.REQUEST_ELEM);
92 Element cgi_paramList = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
93 HashMap<String, Serializable> params = GSXML.extractParams(cgi_paramList, false);
94
95 // just in case there are some that need to get passed to the services
96 HashMap service_params = (HashMap) params.get("s0");
97
98 String collection = (String) params.get(GSParams.COLLECTION);
99 String document_id = (String) params.get(GSParams.DOCUMENT);
100 if (document_id != null && document_id.equals(""))
101 {
102 document_id = null;
103 }
104 String href = (String) params.get(GSParams.HREF);//for an external link : get the href URL if it is existing in the params list
105 if (href != null && href.equals(""))
106 {
107 href = null;
108 }
109 String rl = (String) params.get(GSParams.RELATIVE_LINK);//for an external link : get the rl value if it is existing in the params list
110 if (document_id == null && href == null)
111 {
112 logger.error("no document specified!");
113 return result;
114 }
115 if (rl != null && rl.equals("0"))
116 {
117 // this is a true external link, we should have been directed to a different page or action
118 logger.error("rl value was 0, shouldn't get here");
119 return result;
120 }
121 String document_type = (String) params.get(GSParams.DOCUMENT_TYPE);
122 if (document_type != null && document_type.equals(""))
123 {
124 //document_type = "hierarchy";
125 document_type = null; // we'll get it later if not already specified
126 }
127 //whether to retrieve siblings or not
128 boolean get_siblings = false;
129 String sibs = (String) params.get(SIBLING_ARG);
130 if (sibs != null && sibs.equals("1"))
131 {
132 get_siblings = true;
133 }
134
135 String doc_id_modifier = "";
136 String sibling_num = (String) params.get(GOTO_PAGE_ARG);
137 if (sibling_num != null && !sibling_num.equals(""))
138 {
139 // we have to modify the doc name
140 doc_id_modifier = "." + sibling_num + ".ss";
141 }
142
143 boolean expand_document = false;
144 String ed_arg = (String) params.get(EXPAND_DOCUMENT_ARG);
145 if (ed_arg != null && ed_arg.equals("1"))
146 {
147 expand_document = true;
148 }
149
150 boolean expand_contents = false;
151 if (expand_document)
152 { // we always expand the contents with the text
153 expand_contents = true;
154 }
155 else
156 {
157 String ec_arg = (String) params.get(EXPAND_CONTENTS_ARG);
158 if (ec_arg != null && ec_arg.equals("1"))
159 {
160 expand_contents = true;
161 }
162 }
163
164 UserContext userContext = new UserContext(request);
165
166 //append site metadata
167 addSiteMetadata(page_response, userContext);
168 addInterfaceOptions(page_response);
169
170 // get the additional data needed for the page
171 getBackgroundData(page_response, collection, userContext);
172 Element format_elem = (Element) GSXML.getChildByTagName(page_response, GSXML.FORMAT_ELEM);
173
174 // the_document is where all the doc info - structure and metadata etc
175 // is added into, to be returned in the page
176 Element the_document = this.doc.createElement(GSXML.DOCUMENT_ELEM);
177 page_response.appendChild(the_document);
178
179 // create a basic doc list containing the current node
180 Element basic_doc_list = this.doc.createElement(GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
181 Element current_doc = this.doc.createElement(GSXML.DOC_NODE_ELEM);
182 basic_doc_list.appendChild(current_doc);
183 if (document_id != null)
184 {
185 current_doc.setAttribute(GSXML.NODE_ID_ATT, document_id + doc_id_modifier);
186 }
187 else
188 {
189 current_doc.setAttribute(GSXML.HREF_ID_ATT, href);
190 // do we need this??
191 current_doc.setAttribute(GSXML.ID_MOD_ATT, doc_id_modifier);
192 }
193
194 if (document_type == null)
195 {
196 logger.error("getting document type");
197 document_type = getDocumentType(basic_doc_list, collection, userContext, page_response);
198 logger.error("new doc type = " + document_type);
199 }
200 if (document_type != null)
201 {
202 // set the doctype from the cgi arg or from the server as an attribute
203 the_document.setAttribute(GSXML.DOC_TYPE_ATT, document_type);
204 }
205 else
206 {
207 logger.error("doctype is null!!!***********");
208 }
209
210 // Create a parameter list to specify the required structure information
211 Element ds_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
212
213 if (service_params != null)
214 {
215 GSXML.addParametersToList(this.doc, ds_param_list, service_params);
216 }
217
218 Element ds_param = null;
219 boolean get_structure = false;
220 boolean get_structure_info = false;
221 if (document_type.equals(GSXML.DOC_TYPE_PAGED))
222 {
223 get_structure_info = true;
224
225 if (expand_contents)
226 {
227 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
228 ds_param_list.appendChild(ds_param);
229 ds_param.setAttribute(GSXML.NAME_ATT, "structure");
230 ds_param.setAttribute(GSXML.VALUE_ATT, "entire");
231 }
232
233 // get the info needed for paged naviagtion
234 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
235 ds_param_list.appendChild(ds_param);
236 ds_param.setAttribute(GSXML.NAME_ATT, "info");
237 ds_param.setAttribute(GSXML.VALUE_ATT, "numSiblings");
238 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
239 ds_param_list.appendChild(ds_param);
240 ds_param.setAttribute(GSXML.NAME_ATT, "info");
241 ds_param.setAttribute(GSXML.VALUE_ATT, "numChildren");
242 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
243 ds_param_list.appendChild(ds_param);
244 ds_param.setAttribute(GSXML.NAME_ATT, "info");
245 ds_param.setAttribute(GSXML.VALUE_ATT, "siblingPosition");
246
247 if (get_siblings)
248 {
249 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
250 ds_param_list.appendChild(ds_param);
251 ds_param.setAttribute(GSXML.NAME_ATT, "structure");
252 ds_param.setAttribute(GSXML.VALUE_ATT, "siblings");
253 }
254
255 }
256 else if (document_type.equals(GSXML.DOC_TYPE_HIERARCHY))
257 {
258 get_structure = true;
259 if (expand_contents)
260 {
261 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
262 ds_param_list.appendChild(ds_param);
263 ds_param.setAttribute(GSXML.NAME_ATT, "structure");
264 ds_param.setAttribute(GSXML.VALUE_ATT, "entire");
265 }
266 else
267 {
268 // get the info needed for table of contents
269 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
270 ds_param_list.appendChild(ds_param);
271 ds_param.setAttribute(GSXML.NAME_ATT, "structure");
272 ds_param.setAttribute(GSXML.VALUE_ATT, "ancestors");
273 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
274 ds_param_list.appendChild(ds_param);
275 ds_param.setAttribute(GSXML.NAME_ATT, "structure");
276 ds_param.setAttribute(GSXML.VALUE_ATT, "children");
277 if (get_siblings)
278 {
279 ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
280 ds_param_list.appendChild(ds_param);
281 ds_param.setAttribute(GSXML.NAME_ATT, "structure");
282 ds_param.setAttribute(GSXML.VALUE_ATT, "siblings");
283 }
284 }
285 }
286 else
287 {
288 // we dont need any structure
289 }
290
291 boolean has_dummy = false;
292 if (get_structure || get_structure_info)
293 {
294
295 // Build a request to obtain the document structure
296 Element ds_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
297 String to = GSPath.appendLink(collection, "DocumentStructureRetrieve");// Hard-wired?
298 Element ds_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, to, userContext);
299 ds_message.appendChild(ds_request);
300 ds_request.appendChild(ds_param_list);
301
302 // add the node list we created earlier
303 ds_request.appendChild(basic_doc_list);
304
305 // Process the document structure retrieve message
306 Element ds_response_message = (Element) this.mr.process(ds_message);
307 if (processErrorElements(ds_response_message, page_response))
308 {
309 return result;
310 }
311
312 // get the info and print out
313 String path = GSPath.appendLink(GSXML.RESPONSE_ELEM, GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
314 path = GSPath.appendLink(path, GSXML.DOC_NODE_ELEM);
315 path = GSPath.appendLink(path, "nodeStructureInfo");
316 Element ds_response_struct_info = (Element) GSXML.getNodeByPath(ds_response_message, path);
317 // get the doc_node bit
318 if (ds_response_struct_info != null)
319 {
320 the_document.appendChild(this.doc.importNode(ds_response_struct_info, true));
321 }
322 path = GSPath.appendLink(GSXML.RESPONSE_ELEM, GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
323 path = GSPath.appendLink(path, GSXML.DOC_NODE_ELEM);
324 path = GSPath.appendLink(path, GSXML.NODE_STRUCTURE_ELEM);
325 Element ds_response_structure = (Element) GSXML.getNodeByPath(ds_response_message, path);
326
327 if (ds_response_structure != null)
328 {
329 // add the contents of the structure bit into the_document
330 NodeList structs = ds_response_structure.getChildNodes();
331 for (int i = 0; i < structs.getLength(); i++)
332 {
333 the_document.appendChild(this.doc.importNode(structs.item(i), true));
334 }
335 }
336 else
337 {
338 // no structure nodes, so put in a dummy doc node
339 Element doc_node = this.doc.createElement(GSXML.DOC_NODE_ELEM);
340 if (document_id != null)
341 {
342 doc_node.setAttribute(GSXML.NODE_ID_ATT, document_id);
343 }
344 else
345 {
346 doc_node.setAttribute(GSXML.HREF_ID_ATT, href);
347
348 }
349 the_document.appendChild(doc_node);
350 has_dummy = true;
351 }
352 }
353 else
354 { // a simple type - we dont have a dummy node for simple
355 // should think about this more
356 // no structure request, so just put in a dummy doc node
357 Element doc_node = this.doc.createElement(GSXML.DOC_NODE_ELEM);
358 if (document_id != null)
359 {
360 doc_node.setAttribute(GSXML.NODE_ID_ATT, document_id);
361 }
362 else
363 {
364 doc_node.setAttribute(GSXML.HREF_ID_ATT, href);
365 }
366 the_document.appendChild(doc_node);
367 has_dummy = true;
368 }
369
370 // Build a request to obtain some document metadata
371 Element dm_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
372 String to = GSPath.appendLink(collection, "DocumentMetadataRetrieve"); // Hard-wired?
373 Element dm_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, to, userContext);
374 dm_message.appendChild(dm_request);
375 // Create a parameter list to specify the required metadata information
376
377 HashSet<String> meta_names = new HashSet<String>();
378 meta_names.add("Title"); // the default
379 if (format_elem != null)
380 {
381 getRequiredMetadataNames(format_elem, meta_names);
382 }
383
384 Element dm_param_list = createMetadataParamList(meta_names);
385 if (service_params != null)
386 {
387 GSXML.addParametersToList(this.doc, dm_param_list, service_params);
388 }
389
390 dm_request.appendChild(dm_param_list);
391
392 // create the doc node list for the metadata request
393 Element dm_doc_list = this.doc.createElement(GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
394 dm_request.appendChild(dm_doc_list);
395
396 // Add each node from the structure response into the metadata request
397 NodeList doc_nodes = the_document.getElementsByTagName(GSXML.DOC_NODE_ELEM);
398 for (int i = 0; i < doc_nodes.getLength(); i++)
399 {
400 Element doc_node = (Element) doc_nodes.item(i);
401 String doc_node_id = doc_node.getAttribute(GSXML.NODE_ID_ATT);
402
403 // Add the documentNode to the list
404 Element dm_doc_node = this.doc.createElement(GSXML.DOC_NODE_ELEM);
405 dm_doc_list.appendChild(dm_doc_node);
406 dm_doc_node.setAttribute(GSXML.NODE_ID_ATT, doc_node_id);
407 dm_doc_node.setAttribute(GSXML.NODE_TYPE_ATT, doc_node.getAttribute(GSXML.NODE_TYPE_ATT));
408 }
409
410 // we also want a metadata request to the top level document to get
411 // assocfilepath - this could be cached too
412 Element doc_meta_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, to, userContext);
413 dm_message.appendChild(doc_meta_request);
414 Element doc_meta_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
415 if (service_params != null)
416 {
417 GSXML.addParametersToList(this.doc, doc_meta_param_list, service_params);
418 }
419
420 doc_meta_request.appendChild(doc_meta_param_list);
421 Element doc_param = this.doc.createElement(GSXML.PARAM_ELEM);
422 doc_meta_param_list.appendChild(doc_param);
423 doc_param.setAttribute(GSXML.NAME_ATT, "metadata");
424 doc_param.setAttribute(GSXML.VALUE_ATT, "assocfilepath");
425
426 // create the doc node list for the metadata request
427 Element doc_list = this.doc.createElement(GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
428 doc_meta_request.appendChild(doc_list);
429
430 Element doc_node = this.doc.createElement(GSXML.DOC_NODE_ELEM);
431 // the node we want is the root document node
432 if (document_id != null)
433 {
434 doc_node.setAttribute(GSXML.NODE_ID_ATT, document_id + ".rt");
435 }
436 else
437 {
438 doc_node.setAttribute(GSXML.HREF_ID_ATT, href);// + ".rt");
439 // can we assume that href is always a top level doc??
440 //doc_node.setAttribute(GSXML.ID_MOD_ATT, ".rt");
441 //doc_node.setAttribute("externalURL", has_rl);
442 }
443 doc_list.appendChild(doc_node);
444
445 Element dm_response_message = (Element) this.mr.process(dm_message);
446 if (processErrorElements(dm_response_message, page_response))
447 {
448 return result;
449 }
450
451 String path = GSPath.appendLink(GSXML.RESPONSE_ELEM, GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
452 Element dm_response_doc_list = (Element) GSXML.getNodeByPath(dm_response_message, path);
453
454 // Merge the metadata with the structure information
455 NodeList dm_response_docs = dm_response_doc_list.getChildNodes();
456 for (int i = 0; i < doc_nodes.getLength(); i++)
457 {
458 GSXML.mergeMetadataLists(doc_nodes.item(i), dm_response_docs.item(i));
459 }
460 // get the top level doc metadata out
461 Element doc_meta_response = (Element) dm_response_message.getElementsByTagName(GSXML.RESPONSE_ELEM).item(1);
462 Element top_doc_node = (Element) GSXML.getNodeByPath(doc_meta_response, "documentNodeList/documentNode");
463 GSXML.mergeMetadataLists(the_document, top_doc_node);
464
465 // Build a request to obtain some document content
466 Element dc_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
467 to = GSPath.appendLink(collection, "DocumentContentRetrieve"); // Hard-wired?
468 Element dc_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, to, userContext);
469 dc_message.appendChild(dc_request);
470
471 // Create a parameter list to specify the request parameters - empty for now
472 Element dc_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
473 if (service_params != null)
474 {
475 GSXML.addParametersToList(this.doc, dc_param_list, service_params);
476 }
477
478 dc_request.appendChild(dc_param_list);
479
480 // get the content
481 // the doc list for the content request is the same as the one for the structure request unless we want the whole document, in which case its the same as for the metadata request.
482 if (expand_document)
483 {
484 dc_request.appendChild(dm_doc_list);
485 }
486 else
487 {
488 dc_request.appendChild(basic_doc_list);
489 }
490 logger.debug("request = " + XMLConverter.getString(dc_message));
491 Element dc_response_message = (Element) this.mr.process(dc_message);
492 if (processErrorElements(dc_response_message, page_response))
493 {
494 return result;
495 }
496
497 Element dc_response_doc_list = (Element) GSXML.getNodeByPath(dc_response_message, path);
498
499 if (expand_document)
500 {
501 // Merge the content with the structure information
502 NodeList dc_response_docs = dc_response_doc_list.getChildNodes();
503 for (int i = 0; i < doc_nodes.getLength(); i++)
504 {
505 Node content = GSXML.getChildByTagName((Element) dc_response_docs.item(i), "nodeContent");
506 if (content != null)
507 {
508 if (highlight_query_terms)
509 {
510 content = highlightQueryTerms(request, (Element) content);
511 }
512 doc_nodes.item(i).appendChild(this.doc.importNode(content, true));
513 }
514 //GSXML.mergeMetadataLists(doc_nodes.item(i), dm_response_docs.item(i));
515 }
516 }
517 else
518 {
519 //path = GSPath.appendLink(path, GSXML.DOC_NODE_ELEM);
520 Element dc_response_doc = (Element) GSXML.getChildByTagName(dc_response_doc_list, GSXML.DOC_NODE_ELEM);
521 Element dc_response_doc_content = (Element) GSXML.getChildByTagName(dc_response_doc, GSXML.NODE_CONTENT_ELEM);
522 //Element dc_response_doc_external = (Element) GSXML.getChildByTagName(dc_response_doc, "external");
523
524 if (dc_response_doc_content == null)
525 {
526 // no content to add
527 if (dc_response_doc.getAttribute("external").equals("true"))
528 {
529
530 //if (dc_response_doc_external != null)
531 //{
532 String href_id = dc_response_doc.getAttribute(GSXML.HREF_ID_ATT);
533
534 the_document.setAttribute("selectedNode", href_id);
535 the_document.setAttribute("external", href_id);
536 }
537 return result;
538 }
539 if (highlight_query_terms)
540 {
541 dc_response_doc.removeChild(dc_response_doc_content);
542
543 dc_response_doc_content = highlightQueryTerms(request, dc_response_doc_content);
544 dc_response_doc.appendChild(dc_response_doc.getOwnerDocument().importNode(dc_response_doc_content, true));
545 }
546
547 if (provide_annotations)
548 {
549 String service_selected = (String) params.get(ENRICH_DOC_ARG);
550 if (service_selected != null && service_selected.equals("1"))
551 {
552 // now we can modifiy the response doc if needed
553 String enrich_service = (String) params.get(GSParams.SERVICE);
554 // send a message to the service
555 Element enrich_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
556 Element enrich_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, enrich_service, userContext);
557 enrich_message.appendChild(enrich_request);
558 // check for parameters
559 HashMap e_service_params = (HashMap) params.get("s1");
560 if (e_service_params != null)
561 {
562 Element enrich_pl = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
563 GSXML.addParametersToList(this.doc, enrich_pl, e_service_params);
564 enrich_request.appendChild(enrich_pl);
565 }
566 Element e_doc_list = this.doc.createElement(GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
567 enrich_request.appendChild(e_doc_list);
568 e_doc_list.appendChild(this.doc.importNode(dc_response_doc, true));
569
570 Node enrich_response = this.mr.process(enrich_message);
571
572 String[] links = { GSXML.RESPONSE_ELEM, GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER, GSXML.DOC_NODE_ELEM, GSXML.NODE_CONTENT_ELEM };
573 path = GSPath.createPath(links);
574 dc_response_doc_content = (Element) GSXML.getNodeByPath(enrich_response, path);
575
576 }
577 } // if provide_annotations
578
579 // use the returned id rather than the sent one cos there may have
580 // been modifiers such as .pr that are removed.
581 String modified_doc_id = dc_response_doc.getAttribute(GSXML.NODE_ID_ATT);
582 the_document.setAttribute("selectedNode", modified_doc_id);
583 if (has_dummy)
584 {
585 // change the id if necessary and add the content
586 Element dummy_node = (Element) doc_nodes.item(0);
587
588 dummy_node.setAttribute(GSXML.NODE_ID_ATT, modified_doc_id);
589 dummy_node.appendChild(this.doc.importNode(dc_response_doc_content, true));
590 // hack for simple type
591 if (document_type.equals("simple"))
592 {
593 // we dont want the internal docNode, just want the content and metadata in the document
594 // rethink this!!
595 the_document.removeChild(dummy_node);
596
597 NodeList dummy_children = dummy_node.getChildNodes();
598 //for (int i=0; i<dummy_children.getLength(); i++) {
599 for (int i = dummy_children.getLength() - 1; i >= 0; i--)
600 {
601 // special case as we don't want more than one metadata list
602 if (dummy_children.item(i).getNodeName().equals(GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER))
603 {
604 GSXML.mergeMetadataFromList(the_document, dummy_children.item(i));
605 }
606 else
607 {
608 the_document.appendChild(dummy_children.item(i));
609 }
610 }
611 }
612 }
613 else
614 {
615 // Merge the document content with the metadata and structure information
616 for (int i = 0; i < doc_nodes.getLength(); i++)
617 {
618 Node dn = doc_nodes.item(i);
619 String dn_id = ((Element) dn).getAttribute(GSXML.NODE_ID_ATT);
620 if (dn_id.equals(modified_doc_id))
621 {
622 dn.appendChild(this.doc.importNode(dc_response_doc_content, true));
623 break;
624 }
625 }
626 }
627 }
628 logger.debug("(DocumentAction) Page:\n" + this.converter.getPrettyString(result));
629 return result;
630 }
631
632 /**
633 * tell the param class what its arguments are if an action has its own
634 * arguments, this should add them to the params object - particularly
635 * important for args that should not be saved
636 */
637 public boolean addActionParameters(GSParams params)
638 {
639 params.addParameter(GOTO_PAGE_ARG, false);
640 params.addParameter(ENRICH_DOC_ARG, false);
641 params.addParameter(EXPAND_DOCUMENT_ARG, false);
642 params.addParameter(EXPAND_CONTENTS_ARG, false);
643 params.addParameter(REALISTIC_BOOK_ARG, false);
644
645 return true;
646 }
647
648 /**
649 * this method gets the collection description, the format info, the list of
650 * enrich services, etc - stuff that is needed for the page, but is the same
651 * whatever the query is - should be cached
652 */
653 protected boolean getBackgroundData(Element page_response, String collection, UserContext userContext)
654 {
655
656 // create a message to process - contains requests for the collection
657 // description, the format element, the enrich services on offer
658 // these could all be cached
659 Element info_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
660 String path = GSPath.appendLink(collection, "DocumentContentRetrieve");
661 // the format request - ignore for now, where does this request go to??
662 Element format_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_FORMAT, path, userContext);
663 info_message.appendChild(format_request);
664
665 // the enrich_services request - only do this if provide_annotations is true
666
667 if (provide_annotations)
668 {
669 Element enrich_services_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, "", userContext);
670 enrich_services_request.setAttribute(GSXML.INFO_ATT, "serviceList");
671 info_message.appendChild(enrich_services_request);
672 }
673
674 Element info_response = (Element) this.mr.process(info_message);
675
676 // the collection is the first response
677 NodeList responses = info_response.getElementsByTagName(GSXML.RESPONSE_ELEM);
678 Element format_resp = (Element) responses.item(0);
679
680 Element format_elem = (Element) GSXML.getChildByTagName(format_resp, GSXML.FORMAT_ELEM);
681 if (format_elem != null)
682 {
683 logger.debug("doc action found a format statement");
684 // set teh format type
685 format_elem.setAttribute(GSXML.TYPE_ATT, "display");
686 page_response.appendChild(this.doc.importNode(format_elem, true));
687 }
688
689 if (provide_annotations)
690 {
691 Element services_resp = (Element) responses.item(1);
692
693 // a new message for the mr
694 Element enrich_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
695 NodeList e_services = services_resp.getElementsByTagName(GSXML.SERVICE_ELEM);
696 boolean service_found = false;
697 for (int j = 0; j < e_services.getLength(); j++)
698 {
699 if (((Element) e_services.item(j)).getAttribute(GSXML.TYPE_ATT).equals("enrich"))
700 {
701 Element s = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, ((Element) e_services.item(j)).getAttribute(GSXML.NAME_ATT), userContext);
702 enrich_message.appendChild(s);
703 service_found = true;
704 }
705 }
706 if (service_found)
707 {
708 Element enrich_response = (Element) this.mr.process(enrich_message);
709
710 NodeList e_responses = enrich_response.getElementsByTagName(GSXML.RESPONSE_ELEM);
711 Element service_list = this.doc.createElement(GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER);
712 for (int i = 0; i < e_responses.getLength(); i++)
713 {
714 Element e_resp = (Element) e_responses.item(i);
715 Element e_service = (Element) this.doc.importNode(GSXML.getChildByTagName(e_resp, GSXML.SERVICE_ELEM), true);
716 e_service.setAttribute(GSXML.NAME_ATT, e_resp.getAttribute(GSXML.FROM_ATT));
717 service_list.appendChild(e_service);
718 }
719 page_response.appendChild(service_list);
720 }
721 } // if provide_annotations
722 return true;
723
724 }
725
726 protected String getDocumentType(Element basic_doc_list, String collection, UserContext userContext, Element page_response)
727 {
728 Element ds_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
729 String to = GSPath.appendLink(collection, "DocumentStructureRetrieve");// Hard-wired?
730 Element ds_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, to, userContext);
731 ds_message.appendChild(ds_request);
732
733 // Create a parameter list to specify the required structure information
734 Element ds_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
735 Element ds_param = this.doc.createElement(GSXML.PARAM_ELEM);
736 ds_param_list.appendChild(ds_param);
737 ds_param.setAttribute(GSXML.NAME_ATT, "info");
738 ds_param.setAttribute(GSXML.VALUE_ATT, "documentType");
739
740 ds_request.appendChild(ds_param_list);
741
742 // add the node list we created earlier
743 ds_request.appendChild(basic_doc_list);
744
745 // Process the document structure retrieve message
746 Element ds_response_message = (Element) this.mr.process(ds_message);
747 if (processErrorElements(ds_response_message, page_response))
748 {
749 return null;
750 }
751
752 String[] links = { GSXML.RESPONSE_ELEM, GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER, GSXML.DOC_NODE_ELEM, "nodeStructureInfo" };
753 String path = GSPath.createPath(links);
754 Element info_elem = (Element) GSXML.getNodeByPath(ds_response_message, path);
755 Element doctype_elem = GSXML.getNamedElement(info_elem, "info", "name", "documentType");
756 if (doctype_elem != null)
757 {
758 String doc_type = doctype_elem.getAttribute("value");
759 return doc_type;
760 }
761 return null;
762 }
763
764 /**
765 * this involves a bit of a hack to get the equivalent query terms - has to
766 * requery the query service - uses the last selected service name. (if it
767 * ends in query). should this action do the query or should it send a
768 * message to the query action? but that will involve lots of extra stuff.
769 * also doesn't handle phrases properly - just highlights all the terms
770 * found in the text.
771 */
772 protected Element highlightQueryTerms(Element request, Element dc_response_doc_content)
773 {
774 // do the query again to get term info
775 Element cgi_param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
776 HashMap<String, Serializable> params = GSXML.extractParams(cgi_param_list, false);
777
778 HashMap previous_params = (HashMap) params.get("p");
779 if (previous_params == null)
780 {
781 return dc_response_doc_content;
782 }
783 String service_name = (String) previous_params.get(GSParams.SERVICE);
784 if (service_name == null || !service_name.endsWith("Query"))
785 { // hack for now - we only do highlighting if we were in a query last - ie not if we were in a browse thingy
786 logger.debug("invalid service, not doing highlighting");
787 return dc_response_doc_content;
788 }
789 String collection = (String) params.get(GSParams.COLLECTION);
790 UserContext userContext = new UserContext(request);
791 String to = GSPath.appendLink(collection, service_name);
792
793 Element mr_query_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
794 Element mr_query_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, to, userContext);
795 mr_query_message.appendChild(mr_query_request);
796
797 // paramList
798 HashMap service_params = (HashMap) params.get("s1");
799
800 Element query_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
801 GSXML.addParametersToList(this.doc, query_param_list, service_params);
802 mr_query_request.appendChild(query_param_list);
803
804 // do the query
805 Element mr_query_response = (Element) this.mr.process(mr_query_message);
806
807 String path = GSPath.appendLink(GSXML.RESPONSE_ELEM, GSXML.TERM_ELEM + GSXML.LIST_MODIFIER);
808 Element query_term_list_element = (Element) GSXML.getNodeByPath(mr_query_response, path);
809 if (query_term_list_element == null)
810 {
811 // no term info
812 logger.error("No query term information.\n");
813 return dc_response_doc_content;
814 }
815
816 String content = GSXML.getNodeText(dc_response_doc_content);
817
818 String metadata_path = GSPath.appendLink(GSXML.RESPONSE_ELEM, GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER);
819 Element metadata_list = (Element) GSXML.getNodeByPath(mr_query_response, metadata_path);
820
821 HashSet<String> query_term_variants = new HashSet<String>();
822 NodeList equivalent_terms_nodelist = query_term_list_element.getElementsByTagName("equivTermList");
823 if (equivalent_terms_nodelist == null || equivalent_terms_nodelist.getLength() == 0)
824 {
825 NodeList terms_nodelist = query_term_list_element.getElementsByTagName("term");
826 if (terms_nodelist != null && terms_nodelist.getLength() > 0)
827 {
828 for (int i = 0; i < terms_nodelist.getLength(); i++)
829 {
830 String termValue = ((Element) terms_nodelist.item(i)).getAttribute("name");
831 String termValueU = null;
832 String termValueL = null;
833
834 if (termValue.length() > 1)
835 {
836 termValueU = termValue.substring(0, 1).toUpperCase() + termValue.substring(1);
837 termValueL = termValue.substring(0, 1).toLowerCase() + termValue.substring(1);
838 }
839 else
840 {
841 termValueU = termValue.substring(0, 1).toUpperCase();
842 termValueL = termValue.substring(0, 1).toLowerCase();
843 }
844
845 query_term_variants.add(termValueU);
846 query_term_variants.add(termValueL);
847 }
848 }
849 }
850 else
851 {
852 for (int i = 0; i < equivalent_terms_nodelist.getLength(); i++)
853 {
854 Element equivalent_terms_element = (Element) equivalent_terms_nodelist.item(i);
855 String[] equivalent_terms = GSXML.getAttributeValuesFromList(equivalent_terms_element, GSXML.NAME_ATT);
856 for (int j = 0; j < equivalent_terms.length; j++)
857 {
858 query_term_variants.add(equivalent_terms[j]);
859 }
860 }
861 }
862
863 ArrayList<ArrayList<HashSet<String>>> phrase_query_term_variants_hierarchy = new ArrayList<ArrayList<HashSet<String>>>();
864
865 Element query_element = GSXML.getNamedElement(metadata_list, GSXML.METADATA_ELEM, GSXML.NAME_ATT, "query");
866 String performed_query = GSXML.getNodeText(query_element) + " ";
867
868 ArrayList<HashSet<String>> phrase_query_p_term_variants_list = new ArrayList<HashSet<String>>();
869 int term_start = 0;
870 boolean in_term = false;
871 boolean in_phrase = false;
872 for (int i = 0; i < performed_query.length(); i++)
873 {
874 char character = performed_query.charAt(i);
875 boolean is_character_letter_or_digit = Character.isLetterOrDigit(character);
876
877 // Has a query term just started?
878 if (in_term == false && is_character_letter_or_digit == true)
879 {
880 in_term = true;
881 term_start = i;
882 }
883
884 // Or has a term just finished?
885 else if (in_term == true && is_character_letter_or_digit == false)
886 {
887 in_term = false;
888 String term = performed_query.substring(term_start, i);
889
890 Element term_element = GSXML.getNamedElement(query_term_list_element, GSXML.TERM_ELEM, GSXML.NAME_ATT, term);
891 if (term_element != null)
892 {
893
894 HashSet<String> phrase_query_p_term_x_variants = new HashSet<String>();
895
896 NodeList term_equivalent_terms_nodelist = term_element.getElementsByTagName("equivTermList");
897 if (term_equivalent_terms_nodelist == null || term_equivalent_terms_nodelist.getLength() == 0)
898 {
899 String termValueU = null;
900 String termValueL = null;
901
902 if (term.length() > 1)
903 {
904 termValueU = term.substring(0, 1).toUpperCase() + term.substring(1);
905 termValueL = term.substring(0, 1).toLowerCase() + term.substring(1);
906 }
907 else
908 {
909 termValueU = term.substring(0, 1).toUpperCase();
910 termValueL = term.substring(0, 1).toLowerCase();
911 }
912
913 phrase_query_p_term_x_variants.add(termValueU);
914 phrase_query_p_term_x_variants.add(termValueL);
915 }
916 else
917 {
918 for (int j = 0; j < term_equivalent_terms_nodelist.getLength(); j++)
919 {
920 Element term_equivalent_terms_element = (Element) term_equivalent_terms_nodelist.item(j);
921 String[] term_equivalent_terms = GSXML.getAttributeValuesFromList(term_equivalent_terms_element, GSXML.NAME_ATT);
922 for (int k = 0; k < term_equivalent_terms.length; k++)
923 {
924 phrase_query_p_term_x_variants.add(term_equivalent_terms[k]);
925 }
926 }
927 }
928 phrase_query_p_term_variants_list.add(phrase_query_p_term_x_variants);
929
930 if (in_phrase == false)
931 {
932 phrase_query_term_variants_hierarchy.add(phrase_query_p_term_variants_list);
933 phrase_query_p_term_variants_list = new ArrayList<HashSet<String>>();
934 }
935 }
936 }
937 // Watch for phrases (surrounded by quotes)
938 if (character == '\"')
939 {
940 // Has a phrase just started?
941 if (in_phrase == false)
942 {
943 in_phrase = true;
944 }
945 // Or has a phrase just finished?
946 else if (in_phrase == true)
947 {
948 in_phrase = false;
949 phrase_query_term_variants_hierarchy.add(phrase_query_p_term_variants_list);
950 }
951
952 phrase_query_p_term_variants_list = new ArrayList<HashSet<String>>();
953 }
954 }
955
956 return highlightQueryTermsInternal(content, query_term_variants, phrase_query_term_variants_hierarchy);
957 }
958
959 /**
960 * Highlights query terms in a piece of text.
961 */
962 private Element highlightQueryTermsInternal(String content, HashSet<String> query_term_variants, ArrayList<ArrayList<HashSet<String>>> phrase_query_term_variants_hierarchy)
963 {
964 // Convert the content string to an array of characters for speed
965 char[] content_characters = new char[content.length()];
966 content.getChars(0, content.length(), content_characters, 0);
967
968 // Now skim through the content, identifying word matches
969 ArrayList<WordMatch> word_matches = new ArrayList<WordMatch>();
970 int word_start = 0;
971 boolean in_word = false;
972 boolean preceding_word_matched = false;
973 boolean inTag = false;
974 for (int i = 0; i < content_characters.length; i++)
975 {
976 //We don't want to find words inside HTML tags
977 if (content_characters[i] == '<')
978 {
979 inTag = true;
980 continue;
981 }
982 else if (inTag && content_characters[i] == '>')
983 {
984 inTag = false;
985 }
986 else if (inTag)
987 {
988 continue;
989 }
990
991 boolean is_character_letter_or_digit = Character.isLetterOrDigit(content_characters[i]);
992
993 // Has a word just started?
994 if (in_word == false && is_character_letter_or_digit == true)
995 {
996 in_word = true;
997 word_start = i;
998 }
999
1000 // Or has a word just finished?
1001 else if (in_word == true && is_character_letter_or_digit == false)
1002 {
1003 in_word = false;
1004
1005 // Check if the word matches any of the query term equivalents
1006 String word = new String(content_characters, word_start, (i - word_start));
1007 if (query_term_variants.contains(word))
1008 {
1009 // We have found a matching word, so remember its location
1010 word_matches.add(new WordMatch(word, word_start, i, preceding_word_matched));
1011 preceding_word_matched = true;
1012 }
1013 else
1014 {
1015 preceding_word_matched = false;
1016 }
1017 }
1018 }
1019
1020 // Don't forget the last word...
1021 if (in_word == true)
1022 {
1023 // Check if the word matches any of the query term equivalents
1024 String word = new String(content_characters, word_start, (content_characters.length - word_start));
1025 if (query_term_variants.contains(word))
1026 {
1027 // We have found a matching word, so remember its location
1028 word_matches.add(new WordMatch(word, word_start, content_characters.length, preceding_word_matched));
1029 }
1030 }
1031
1032 ArrayList<Integer> highlight_start_positions = new ArrayList<Integer>();
1033 ArrayList<Integer> highlight_end_positions = new ArrayList<Integer>();
1034
1035 // Deal with phrases now
1036 ArrayList<PartialPhraseMatch> partial_phrase_matches = new ArrayList<PartialPhraseMatch>();
1037 for (int i = 0; i < word_matches.size(); i++)
1038 {
1039 WordMatch word_match = word_matches.get(i);
1040
1041 // See if any partial phrase matches are extended by this word
1042 if (word_match.preceding_word_matched)
1043 {
1044 for (int j = partial_phrase_matches.size() - 1; j >= 0; j--)
1045 {
1046 PartialPhraseMatch partial_phrase_match = partial_phrase_matches.remove(j);
1047 ArrayList phrase_query_p_term_variants_list = phrase_query_term_variants_hierarchy.get(partial_phrase_match.query_phrase_number);
1048 HashSet phrase_query_p_term_x_variants = (HashSet) phrase_query_p_term_variants_list.get(partial_phrase_match.num_words_matched);
1049 if (phrase_query_p_term_x_variants.contains(word_match.word))
1050 {
1051 partial_phrase_match.num_words_matched++;
1052
1053 // Has a complete phrase match occurred?
1054 if (partial_phrase_match.num_words_matched == phrase_query_p_term_variants_list.size())
1055 {
1056 // Check for overlaps by looking at the previous highlight range
1057 if (!highlight_end_positions.isEmpty())
1058 {
1059 int last_highlight_index = highlight_end_positions.size() - 1;
1060 int last_highlight_end = highlight_end_positions.get(last_highlight_index).intValue();
1061 if (last_highlight_end > partial_phrase_match.start_position)
1062 {
1063 // There is an overlap, so remove the previous phrase match
1064 int last_highlight_start = highlight_start_positions.remove(last_highlight_index).intValue();
1065 highlight_end_positions.remove(last_highlight_index);
1066 partial_phrase_match.start_position = last_highlight_start;
1067 }
1068 }
1069
1070 highlight_start_positions.add(new Integer(partial_phrase_match.start_position));
1071 highlight_end_positions.add(new Integer(word_match.end_position));
1072 }
1073 // No, but add the partial match back into the list for next time
1074 else
1075 {
1076 partial_phrase_matches.add(partial_phrase_match);
1077 }
1078 }
1079 }
1080 }
1081 else
1082 {
1083 partial_phrase_matches.clear();
1084 }
1085
1086 // See if this word is at the start of any of the phrases
1087 for (int p = 0; p < phrase_query_term_variants_hierarchy.size(); p++)
1088 {
1089 ArrayList phrase_query_p_term_variants_list = phrase_query_term_variants_hierarchy.get(p);
1090 HashSet phrase_query_p_term_1_variants = (HashSet) phrase_query_p_term_variants_list.get(0);
1091 if (phrase_query_p_term_1_variants.contains(word_match.word))
1092 {
1093 // If this phrase is just one word long, we have a complete match
1094 if (phrase_query_p_term_variants_list.size() == 1)
1095 {
1096 highlight_start_positions.add(new Integer(word_match.start_position));
1097 highlight_end_positions.add(new Integer(word_match.end_position));
1098 }
1099 // Otherwise we have the start of a potential phrase match
1100 else
1101 {
1102 partial_phrase_matches.add(new PartialPhraseMatch(word_match.start_position, p));
1103 }
1104 }
1105 }
1106 }
1107
1108 // Now add the annotation tags into the document at the correct points
1109 Element content_element = this.doc.createElement(GSXML.NODE_CONTENT_ELEM);
1110
1111 int last_wrote = 0;
1112 for (int i = 0; i < highlight_start_positions.size(); i++)
1113 {
1114 int highlight_start = highlight_start_positions.get(i).intValue();
1115 int highlight_end = highlight_end_positions.get(i).intValue();
1116
1117 // Print anything before the highlight range
1118 if (last_wrote < highlight_start)
1119 {
1120 String preceding_text = new String(content_characters, last_wrote, (highlight_start - last_wrote));
1121 content_element.appendChild(this.doc.createTextNode(preceding_text));
1122 }
1123
1124 // Print the highlight text, annotated
1125 if (highlight_end > last_wrote)
1126 {
1127 String highlight_text = new String(content_characters, highlight_start, (highlight_end - highlight_start));
1128 Element annotation_element = GSXML.createTextElement(this.doc, "annotation", highlight_text);
1129 annotation_element.setAttribute("type", "query_term");
1130 content_element.appendChild(annotation_element);
1131 last_wrote = highlight_end;
1132 }
1133 }
1134
1135 // Finish off any unwritten text
1136 if (last_wrote < content_characters.length)
1137 {
1138 String remaining_text = new String(content_characters, last_wrote, (content_characters.length - last_wrote));
1139 content_element.appendChild(this.doc.createTextNode(remaining_text));
1140 }
1141
1142 return content_element;
1143 }
1144
1145 static private class WordMatch
1146 {
1147 public String word;
1148 public int start_position;
1149 public int end_position;
1150 public boolean preceding_word_matched;
1151
1152 public WordMatch(String word, int start_position, int end_position, boolean preceding_word_matched)
1153 {
1154 this.word = word;
1155 this.start_position = start_position;
1156 this.end_position = end_position;
1157 this.preceding_word_matched = preceding_word_matched;
1158 }
1159 }
1160
1161 static private class PartialPhraseMatch
1162 {
1163 public int start_position;
1164 public int query_phrase_number;
1165 public int num_words_matched;
1166
1167 public PartialPhraseMatch(int start_position, int query_phrase_number)
1168 {
1169 this.start_position = start_position;
1170 this.query_phrase_number = query_phrase_number;
1171 this.num_words_matched = 1;
1172 }
1173 }
1174}
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