Apply boost values ​​to search queries

airsonic-main/src/main/java/org/airsonic/player/service/search/IndexType.java

@@ -39,7 +39,7 @@ public enum IndexType {
             FieldNames.TITLE,
             FieldNames.ARTIST),
         boosts(
-            entry(FieldNames.TITLE, 2F))),
+            entry(FieldNames.TITLE, 1.1F))),
 
     ALBUM(
         fieldNames(
@@ -47,7 +47,7 @@ public enum IndexType {
             FieldNames.ARTIST), 
             // FieldNames.FOLDER), // XXX 3.x -> 8.x : Remove folder from multi-field search condition
         boosts(
-            entry(FieldNames.ALBUM, 2F))),
+            entry(FieldNames.ALBUM, 1.1F))),
 
     ALBUM_ID3(
         fieldNames(
@@ -55,20 +55,18 @@ public enum IndexType {
             FieldNames.ARTIST),
             // FieldNames.FOLDER_ID), // XXX 3.x -> 8.x : Remove folder from multi-field search condition
         boosts(
-            entry(FieldNames.ALBUM, 2F))),
+            entry(FieldNames.ALBUM, 1.1F))),
 
     ARTIST(
         fieldNames(
             FieldNames.ARTIST),
             // FieldNames.FOLDER), // XXX 3.x -> 8.x : Remove folder from multi-field search condition
-        boosts(
+        boosts()),
-            entry(FieldNames.ARTIST, 1F))),
 
     ARTIST_ID3(
         fieldNames(
             FieldNames.ARTIST),
-        boosts(
+        boosts()),
-            entry(FieldNames.ARTIST, 2F))),
 
     ;
 

airsonic-main/src/main/java/org/airsonic/player/service/search/QueryFactory.java

@@ -31,6 +31,7 @@ import org.apache.lucene.document.IntPoint;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.search.BooleanClause.Occur;
 import org.apache.lucene.search.BooleanQuery;
+import org.apache.lucene.search.BoostQuery;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.TermQuery;
 import org.apache.lucene.search.WildcardQuery;
@@ -101,7 +102,8 @@ public class QueryFactory {
      *  - Self made parser process reduces one library dependency.
      *  - It is easy to make corrections later when changing the query to improve search accuracy.
      */
-    private Query createMultiFieldWildQuery(@NonNull String[] fieldNames, @NonNull String queryString)
+    private Query createMultiFieldWildQuery(@NonNull String[] fieldNames, @NonNull String queryString,
+            @NonNull IndexType indexType)
             throws IOException {
 
         BooleanQuery.Builder mainQuery = new BooleanQuery.Builder();
@@ -117,7 +119,11 @@ public class QueryFactory {
                 while (stream.incrementToken()) {
                     String token = stream.getAttribute(CharTermAttribute.class).toString();
                     WildcardQuery wildcardQuery = new WildcardQuery(new Term(fieldName, token.concat(ASTERISK)));
-                    fieldQuerys.add(wildcardQuery);
+                    if (indexType.getBoosts().containsKey(fieldName)) {
+                        fieldQuerys.add(new BoostQuery(wildcardQuery, indexType.getBoosts().get(fieldName)));
+                    } else {
+                        fieldQuerys.add(wildcardQuery);
+                    }
                 }
                 fieldsQuerys.add(fieldQuerys);
             }
@@ -169,7 +175,7 @@ public class QueryFactory {
 
         BooleanQuery.Builder mainQuery = new BooleanQuery.Builder();
 
-        Query multiFieldQuery = createMultiFieldWildQuery(indexType.getFields(), criteria.getQuery());
+        Query multiFieldQuery = createMultiFieldWildQuery(indexType.getFields(), criteria.getQuery(), indexType);
         mainQuery.add(multiFieldQuery, Occur.MUST);
 
         boolean isId3 = indexType == IndexType.ALBUM_ID3 || indexType == IndexType.ARTIST_ID3;

airsonic-main/src/test/java/org/airsonic/player/service/search/QueryFactoryTestCase.java

@@ -123,13 +123,13 @@ public class QueryFactoryTestCase {
 
         Query query = queryFactory.search(criteria, SINGLE_FOLDERS, IndexType.ALBUM);
         assertEquals("SearchAlbum",
-                "+((album:abc* artist:abc*) (album:def* artist:def*)) +(folder:" + PATH1
+                "+(((album:abc*)^1.1 artist:abc*) ((album:def*)^1.1 artist:def*)) +(folder:" + PATH1
                         + ")",
                 query.toString());
 
         query = queryFactory.search(criteria, MULTI_FOLDERS, IndexType.ALBUM);
         assertEquals("SearchAlbum",
-                "+((album:abc* artist:abc*) (album:def* artist:def*)) +(folder:" + PATH1
+                "+(((album:abc*)^1.1 artist:abc*) ((album:def*)^1.1 artist:def*)) +(folder:" + PATH1
                         + " folder:" + PATH2 + ")",
                 query.toString());
     }
@@ -143,11 +143,11 @@ public class QueryFactoryTestCase {
 
         Query query = queryFactory.search(criteria, SINGLE_FOLDERS, IndexType.SONG);
         assertEquals("SearchSong",
-                "+((title:abc* artist:abc*) (title:def* artist:def*)) +(folder:" + PATH1 + ")",
+                "+(((title:abc*)^1.1 artist:abc*) ((title:def*)^1.1 artist:def*)) +(folder:" + PATH1 + ")",
                 query.toString());
 
         query = queryFactory.search(criteria, MULTI_FOLDERS, IndexType.SONG);
-        assertEquals("SearchSong", "+((title:abc* artist:abc*) (title:def* artist:def*)) +(folder:" + PATH1
+        assertEquals("SearchSong", "+(((title:abc*)^1.1 artist:abc*) ((title:def*)^1.1 artist:def*)) +(folder:" + PATH1
                 + " folder:" + PATH2 + ")", query.toString());
     }
 
@@ -178,13 +178,13 @@ public class QueryFactoryTestCase {
 
         Query query = queryFactory.search(criteria, SINGLE_FOLDERS, IndexType.ALBUM_ID3);
         assertEquals(
-                "SearchAlbumId3", "+((album:abc* artist:abc*) (album:def* artist:def*)) "
+                "SearchAlbumId3", "+(((album:abc*)^1.1 artist:abc*) ((album:def*)^1.1 artist:def*)) "
                         + "+(folderId:" + FID1 + ")",
                 query.toString());
 
         query = queryFactory.search(criteria, MULTI_FOLDERS, IndexType.ALBUM_ID3);
         assertEquals("SearchAlbumId3",
-                "+((album:abc* artist:abc*) (album:def* artist:def*)) +(folderId:"
+                "+(((album:abc*)^1.1 artist:abc*) ((album:def*)^1.1 artist:def*)) +(folderId:"
                         + FID1 + " folderId:"
                         + FID2 + ")",
                 query.toString());