private void createRetrieveDocs(ResponseBuilder rb) {
// TODO: in a system with nTiers > 2, we could be passed "ids" here
// unless those requests always go to the final destination shard
// for each shard, collect the documents for that shard.
HashMap<String, Collection<ShardDoc>> shardMap = new HashMap<String, Collection<ShardDoc>>();
for (ShardDoc sdoc : rb.resultIds.values()) {
Collection<ShardDoc> shardDocs = shardMap.get(sdoc.shard);
if (shardDocs == null) {
shardDocs = new ArrayList<ShardDoc>();
shardMap.put(sdoc.shard, shardDocs);
}
shardDocs.add(sdoc);
}
SchemaField uniqueField = rb.req.getSchema().getUniqueKeyField();
// Now create a request for each shard to retrieve the stored fields
for (Collection<ShardDoc> shardDocs : shardMap.values()) {
ShardRequest sreq = new ShardRequest();
sreq.purpose = ShardRequest.PURPOSE_GET_FIELDS;
sreq.shards = new String[] {shardDocs.iterator().next().shard};
sreq.params = new ModifiableSolrParams();
// add original params
sreq.params.add(rb.req.getParams());
// no need for a sort, we already have order
sreq.params.remove(CommonParams.SORT);
// we already have the field sort values
sreq.params.remove(ResponseBuilder.FIELD_SORT_VALUES);
// make sure that the id is returned for correlation.
String fl = sreq.params.get(CommonParams.FL);
if (fl != null) {
fl = fl.trim();
// currently, "score" is synonymous with "*,score" so
// don't add "id" if the fl is empty or "score" or it would change the meaning.
if (fl.length() != 0 && !"score".equals(fl) && !"*".equals(fl)) {
sreq.params.set(CommonParams.FL, fl + ',' + uniqueField.getName());
}
}
ArrayList<String> ids = new ArrayList<String>(shardDocs.size());
for (ShardDoc shardDoc : shardDocs) {
// TODO: depending on the type, we may need more tha a simple toString()?
ids.add(shardDoc.id.toString());
}
sreq.params.add(ShardParams.IDS, StrUtils.join(ids, ','));
rb.addRequest(this, sreq);
}
}
protected void doFieldSortValues(ResponseBuilder rb, SolrIndexSearcher searcher)
throws IOException {
SolrQueryRequest req = rb.req;
SolrQueryResponse rsp = rb.rsp;
// The query cache doesn't currently store sort field values, and SolrIndexSearcher doesn't
// currently have an option to return sort field values. Because of this, we
// take the documents given and re-derive the sort values.
boolean fsv = req.getParams().getBool(ResponseBuilder.FIELD_SORT_VALUES, false);
if (fsv) {
Sort sort = rb.getSortSpec().getSort();
SortField[] sortFields =
sort == null ? new SortField[] {SortField.FIELD_SCORE} : sort.getSort();
NamedList sortVals = new NamedList(); // order is important for the sort fields
Field field = new Field("dummy", "", Field.Store.YES, Field.Index.NO); // a dummy Field
SolrIndexReader reader = searcher.getReader();
SolrIndexReader[] readers = reader.getLeafReaders();
SolrIndexReader subReader = reader;
if (readers.length == 1) {
// if there is a single segment, use that subReader and avoid looking up each time
subReader = readers[0];
readers = null;
}
int[] offsets = reader.getLeafOffsets();
for (SortField sortField : sortFields) {
int type = sortField.getType();
if (type == SortField.SCORE || type == SortField.DOC) continue;
FieldComparator comparator = null;
FieldComparator comparators[] =
(readers == null) ? null : new FieldComparator[readers.length];
String fieldname = sortField.getField();
FieldType ft = fieldname == null ? null : req.getSchema().getFieldTypeNoEx(fieldname);
DocList docList = rb.getResults().docList;
ArrayList<Object> vals = new ArrayList<Object>(docList.size());
DocIterator it = rb.getResults().docList.iterator();
int offset = 0;
int idx = 0;
while (it.hasNext()) {
int doc = it.nextDoc();
if (readers != null) {
idx = SolrIndexReader.readerIndex(doc, offsets);
subReader = readers[idx];
offset = offsets[idx];
comparator = comparators[idx];
}
if (comparator == null) {
comparator = sortField.getComparator(1, 0);
comparator = comparator.setNextReader(subReader, offset);
if (comparators != null) comparators[idx] = comparator;
}
doc -= offset; // adjust for what segment this is in
comparator.copy(0, doc);
Object val = comparator.value(0);
// Sortable float, double, int, long types all just use a string
// comparator. For these, we need to put the type into a readable
// format. One reason for this is that XML can't represent all
// string values (or even all unicode code points).
// indexedToReadable() should be a no-op and should
// thus be harmless anyway (for all current ways anyway)
if (val instanceof String) {
field.setValue((String) val);
val = ft.toObject(field);
}
// Must do the same conversion when sorting by a
// String field in Lucene, which returns the terms
// data as BytesRef:
if (val instanceof BytesRef) {
field.setValue(((BytesRef) val).utf8ToString());
val = ft.toObject(field);
}
vals.add(val);
}
sortVals.add(fieldname, vals);
}
rsp.add("sort_values", sortVals);
}
}
