/**
* Return the query specified in the request, shorn of all duplicate classes in the view. Note, it
* is the users responsibility to ensure that there are only SequenceFeatures in the view.
*
* @return A query.
*/
protected PathQuery getQuery() {
String xml = getRequiredParameter(XML_PARAM);
PathQueryBuilder builder = getQueryBuilder(xml);
PathQuery pq = builder.getQuery();
List<String> newView = new ArrayList<String>();
Set<ClassDescriptor> seenTypes = new HashSet<ClassDescriptor>();
for (String viewPath : pq.getView()) {
Path p;
try {
p = new Path(pq.getModel(), viewPath);
} catch (PathException e) {
throw new BadRequestException("Query is invalid", e);
}
ClassDescriptor cd = p.getLastClassDescriptor();
if (!seenTypes.contains(cd)) {
newView.add(viewPath);
}
seenTypes.add(cd);
}
if (!newView.equals(pq.getView())) {
pq.clearView();
pq.addViews(newView);
}
return pq;
}
/**
* Get the pathquery to use for this request.
*
* @param request The http request.
* @return A pathquery
*/
protected PathQuery getQuery(HttpServletRequest request) {
String xml = request.getParameter(XML_PARAM);
if (StringUtils.isEmpty(xml)) {
throw new BadRequestException("query is blank");
}
PathQueryBuilder builder = getQueryBuilder(xml);
PathQuery pq = builder.getQuery();
if (pq.getView().size() != 1) {
throw new BadRequestException(
"Queries to the query-to-list service can only have one output column");
}
if (!pq.getView().get(0).endsWith(".id")) {
throw new BadRequestException(
"Queries to the query-to-list service must have ids in their view");
}
return pq;
}
