private List<PagingLink> getPagingLinks(
int startIndex,
int hitsPerPage,
int hitsLength,
int maxHitSize,
String baseUrl,
ParamMap params) {
List<PagingLink> pagingLinks = new ArrayList<PagingLink>();
// No paging links if only one page of results
if (hitsLength <= hitsPerPage) {
return pagingLinks;
}
for (int i = 0; i < hitsLength; i += hitsPerPage) {
params.put("startIndex", String.valueOf(i));
if (i < maxHitSize - hitsPerPage) {
int pageNumber = i / hitsPerPage + 1;
if (i >= startIndex && i < (startIndex + hitsPerPage)) {
pagingLinks.add(new PagingLink(pageNumber));
} else {
pagingLinks.add(new PagingLink(pageNumber, baseUrl, params));
}
} else {
pagingLinks.add(new PagingLink("more...", baseUrl, params));
}
}
return pagingLinks;
}
private String getNextPageLink(int startIndex, int hitsPerPage, String baseUrl, ParamMap params) {
params.put("startIndex", String.valueOf(startIndex + hitsPerPage));
// return new PagingLink("Next", baseUrl, params);
return UrlBuilder.getUrl(baseUrl, params);
}
@Override
protected ResponseValues processRequest(VitroRequest vreq) {
// There may be other non-html formats in the future
Format format = getFormat(vreq);
boolean wasXmlRequested = Format.XML == format;
log.debug("xml was the requested format");
boolean wasHtmlRequested = !wasXmlRequested;
try {
Portal portal = vreq.getPortal();
PortalFlag portalFlag = vreq.getPortalFlag();
// make sure an IndividualDao is available
if (vreq.getWebappDaoFactory() == null
|| vreq.getWebappDaoFactory().getIndividualDao() == null) {
log.error("Could not get webappDaoFactory or IndividualDao");
throw new Exception("Could not access model.");
}
IndividualDao iDao = vreq.getWebappDaoFactory().getIndividualDao();
VClassGroupDao grpDao = vreq.getWebappDaoFactory().getVClassGroupDao();
VClassDao vclassDao = vreq.getWebappDaoFactory().getVClassDao();
String alphaFilter = vreq.getParameter("alpha");
int startIndex = 0;
try {
startIndex = Integer.parseInt(vreq.getParameter("startIndex"));
} catch (Throwable e) {
startIndex = 0;
}
log.debug("startIndex is " + startIndex);
int hitsPerPage = defaultHitsPerPage;
try {
hitsPerPage = Integer.parseInt(vreq.getParameter("hitsPerPage"));
} catch (Throwable e) {
hitsPerPage = defaultHitsPerPage;
}
log.debug("hitsPerPage is " + hitsPerPage);
int maxHitSize = defaultMaxSearchSize;
if (startIndex >= defaultMaxSearchSize - hitsPerPage)
maxHitSize = startIndex + defaultMaxSearchSize;
if (alphaFilter != null) {
maxHitSize = maxHitSize * 2;
hitsPerPage = maxHitSize;
}
log.debug("maxHitSize is " + maxHitSize);
String qtxt = vreq.getParameter(VitroQuery.QUERY_PARAMETER_NAME);
Analyzer analyzer = getAnalyzer(getServletContext());
Query query = null;
try {
query = getQuery(vreq, portalFlag, analyzer, qtxt);
log.debug("query for '" + qtxt + "' is " + query.toString());
} catch (ParseException e) {
return doBadQuery(portal, qtxt, format);
}
IndexSearcher searcherForRequest = LuceneIndexFactory.getIndexSearcher(getServletContext());
TopDocs topDocs = null;
try {
topDocs = searcherForRequest.search(query, null, maxHitSize);
} catch (Throwable t) {
log.error("in first pass at search: " + t);
// this is a hack to deal with odd cases where search and index threads interact
try {
wait(150);
topDocs = searcherForRequest.search(query, null, maxHitSize);
} catch (Exception ex) {
log.error(ex);
String msg = makeBadSearchMessage(qtxt, ex.getMessage());
if (msg == null) {
msg = "The search request contained errors.";
}
return doFailedSearch(msg, qtxt, format);
}
}
if (topDocs == null || topDocs.scoreDocs == null) {
log.error("topDocs for a search was null");
String msg = "The search request contained errors.";
return doFailedSearch(msg, qtxt, format);
}
int hitsLength = topDocs.scoreDocs.length;
if (hitsLength < 1) {
return doNoHits(qtxt, format);
}
log.debug("found " + hitsLength + " hits");
int lastHitToShow = 0;
if ((startIndex + hitsPerPage) > hitsLength) {
lastHitToShow = hitsLength;
} else {
lastHitToShow = startIndex + hitsPerPage - 1;
}
List<Individual> beans = new LinkedList<Individual>();
for (int i = startIndex; i < topDocs.scoreDocs.length; i++) {
try {
if ((i >= startIndex) && (i <= lastHitToShow)) {
Document doc = searcherForRequest.doc(topDocs.scoreDocs[i].doc);
String uri = doc.get(Entity2LuceneDoc.term.URI);
Individual ent = new IndividualImpl();
ent.setURI(uri);
ent = iDao.getIndividualByURI(uri);
if (ent != null) beans.add(ent);
}
} catch (Exception e) {
log.error("problem getting usable Individuals from search " + "hits" + e.getMessage());
}
}
ParamMap pagingLinkParams = new ParamMap();
pagingLinkParams.put("querytext", qtxt);
pagingLinkParams.put("hitsPerPage", String.valueOf(hitsPerPage));
if (wasXmlRequested) {
pagingLinkParams.put(XML_REQUEST_PARAM, "1");
}
/* Start putting together the data for the templates */
Map<String, Object> body = new HashMap<String, Object>();
String classGroupParam = vreq.getParameter("classgroup");
boolean classGroupFilterRequested = false;
if (!StringUtils.isEmpty(classGroupParam)) {
VClassGroup grp = grpDao.getGroupByURI(classGroupParam);
classGroupFilterRequested = true;
if (grp != null && grp.getPublicName() != null)
body.put("classGroupName", grp.getPublicName());
}
String typeParam = vreq.getParameter("type");
boolean typeFiltereRequested = false;
if (!StringUtils.isEmpty(typeParam)) {
VClass type = vclassDao.getVClassByURI(typeParam);
typeFiltereRequested = true;
if (type != null && type.getName() != null) body.put("typeName", type.getName());
}
/* Add classgroup and type refinement links to body */
if (wasHtmlRequested) {
// Search request includes no classgroup and no type, so add classgroup search refinement
// links.
if (!classGroupFilterRequested && !typeFiltereRequested) {
List<VClassGroup> classgroups = getClassGroups(grpDao, topDocs, searcherForRequest);
List<VClassGroupSearchLink> classGroupLinks =
new ArrayList<VClassGroupSearchLink>(classgroups.size());
for (VClassGroup vcg : classgroups) {
if (vcg.getPublicName() != null) {
classGroupLinks.add(new VClassGroupSearchLink(qtxt, vcg));
}
}
body.put("classGroupLinks", classGroupLinks);
// Search request is for a classgroup, so add rdf:type search refinement links
// but try to filter out classes that are subclasses
} else if (classGroupFilterRequested && !typeFiltereRequested) {
List<VClass> vClasses = getVClasses(vclassDao, topDocs, searcherForRequest);
List<VClassSearchLink> vClassLinks = new ArrayList<VClassSearchLink>(vClasses.size());
for (VClass vc : vClasses) {
vClassLinks.add(new VClassSearchLink(qtxt, vc));
}
body.put("classLinks", vClassLinks);
pagingLinkParams.put("classgroup", classGroupParam);
// This case is never displayed
} else if (!StringUtils.isEmpty(alphaFilter)) {
body.put("alphas", getAlphas(topDocs, searcherForRequest));
alphaSortIndividuals(beans);
} else {
pagingLinkParams.put("type", typeParam);
}
}
// Convert search result individuals to template model objects
body.put(
"individuals", ListedIndividualTemplateModel.getIndividualTemplateModelList(beans, vreq));
body.put("querytext", qtxt);
body.put("title", qtxt + " - " + portal.getAppName() + " Search Results");
body.put("hitsLength", hitsLength);
body.put("startIndex", startIndex);
body.put(
"pagingLinks",
getPagingLinks(
startIndex,
hitsPerPage,
hitsLength,
maxHitSize,
vreq.getServletPath(),
pagingLinkParams));
if (startIndex != 0) {
body.put(
"prevPage",
getPreviousPageLink(startIndex, hitsPerPage, vreq.getServletPath(), pagingLinkParams));
}
if (startIndex < (hitsLength - hitsPerPage)) {
body.put(
"nextPage",
getNextPageLink(startIndex, hitsPerPage, vreq.getServletPath(), pagingLinkParams));
}
String template = templateTable.get(format).get(Result.PAGED);
return new TemplateResponseValues(template, body);
} catch (Throwable e) {
return doSearchError(e, format);
}
}
