diegoceccarelli commented on a change in pull request #357: [SOLR-12238]
Synonym Queries boost by payload
URL: https://github.com/apache/lucene-solr/pull/357#discussion_r370941548
##########
File path: lucene/core/src/java/org/apache/lucene/util/QueryBuilder.java
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@@ -349,25 +361,78 @@ protected Query createFieldQuery(TokenStream source,
BooleanClause.Occur operato
* returned. When multiple tokens, an ordered <code>SpanNearQuery</code>
with slop 0 is returned.
*/
protected SpanQuery createSpanQuery(TokenStream in, String field) throws
IOException {
+ PayloadAttribute payloadAttribute = null;
+ if(synonymsBoostByPayload){
+ payloadAttribute = in.getAttribute(PayloadAttribute.class);
+ }
TermToBytesRefAttribute termAtt =
in.getAttribute(TermToBytesRefAttribute.class);
if (termAtt == null) {
return null;
}
List<SpanTermQuery> terms = new ArrayList<>();
+ List<BytesRef> payloads = new ArrayList<>();
while (in.incrementToken()) {
terms.add(new SpanTermQuery(new Term(field, termAtt.getBytesRef())));
+ if(payloadAttribute!=null){
+ payloads.add(payloadAttribute.getPayload());
+ }
+ }
+ in.end();
+ in.close();
+
+ BytesRef[] queryPayloadsArray = payloads.toArray(new
BytesRef[payloads.size()]);
+ float queryPayloadBoost = 0;
+ if (!payloads.isEmpty()) {
+ queryPayloadBoost = extractQueryPayload(queryPayloadsArray);
}
if (terms.isEmpty()) {
return null;
} else if (terms.size() == 1) {
- return terms.get(0);
+ SpanTermQuery singleTermQuery = terms.get(0);
+ if (queryPayloadBoost != 0) {
+ return new SpanBoostQuery(singleTermQuery, queryPayloadBoost);
+ } else {
+ return singleTermQuery;
+ }
} else {
- return new SpanNearQuery(terms.toArray(new SpanTermQuery[0]), 0, true);
+ SpanNearQuery multiTermQuery = new SpanNearQuery(terms.toArray(new
SpanTermQuery[0]), 0, true);
+ if (queryPayloadBoost != 0) {
+ return new SpanBoostQuery(multiTermQuery, queryPayloadBoost);
+ } else {
+ return multiTermQuery;
+ }
+ }
+ }
+
+ /*Current assumption is that the user will associate a single payload to the
multi terms synonym
+ * that generated the phrase query, so a valid value for the payload
associated to the query is just the first not null payload
+ * e.g.
+ * lion => panthera leo|0.99
+ * "panthera leo" query will have associated Payloads [null,0.99]
+ * So the payload associated to the query will be 0.99 which is the first
not null
+ * */
+ protected float extractQueryPayload(BytesRef[] payloadsForQueryTerms) {
+ for (BytesRef singlePayload : payloadsForQueryTerms) {
+ if (singlePayload != null) {
+ float decodedPayload = decodeFloat(singlePayload.bytes,
singlePayload.offset);
+ return decodedPayload;
+ }
}
+ return 0;
}
+ public static final float decodeFloat(byte [] bytes, int offset){
Review comment:
public intended?
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