private static Object getReferencedId(DataRecord next, ReferenceFieldMetadata field) {
DataRecord record = (DataRecord) next.get(field);
if (record != null) {
Collection<FieldMetadata> keyFields = record.getType().getKeyFields();
if (keyFields.size() == 1) {
return record.get(keyFields.iterator().next());
} else {
List<Object> compositeKeyValues = new ArrayList<Object>(keyFields.size());
for (FieldMetadata keyField : keyFields) {
compositeKeyValues.add(record.get(keyField));
}
return compositeKeyValues;
}
} else {
return StringUtils.EMPTY;
}
}
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);
}
}
/**
* Return a query that will return docs like the passed lucene document ID.
*
* @param docNum the documentID of the lucene doc to generate the 'More Like This" query for.
* @return a query that will return docs like the passed lucene document ID.
*/
public Query like(int docNum) throws IOException {
if (fieldNames == null) {
// gather list of valid fields from lucene
Collection<String> fields = MultiFields.getIndexedFields(ir);
fieldNames = fields.toArray(new String[fields.size()]);
}
return createQuery(retrieveTerms(docNum));
}
@SuppressWarnings("unchecked")
private static BytesRef[] getBytesRefs(Collection values, TermBuilder termBuilder) {
BytesRef[] terms = new BytesRef[values.size()];
int i = 0;
for (Object value : values) {
terms[i] = termBuilder.term(value);
i++;
}
return terms;
}