Clean up some style warnings

build.gradle

@@ -5,7 +5,7 @@ plugins {
     id 'idea'
     id 'maven-publish'
     id 'signing'
-    id "com.diffplug.spotless" version "6.22.0"
+    id "com.diffplug.spotless" version "6.25.0"
     id 'java-library'
     id 'jacoco'
     // Build docs locally by running "site" command

src/main/java/com/yelp/nrtsearch/server/analysis/AnalyzerCreator.java

@@ -147,8 +147,7 @@ public static void initialize(NrtsearchConfig configuration, Iterable<Plugin> pl
         SynonymV2GraphFilterFactory.NAME, SynonymV2GraphFilterFactory.class, builtInTokenFilters);
 
     for (Plugin plugin : plugins) {
-      if (plugin instanceof AnalysisPlugin) {
-        AnalysisPlugin analysisPlugin = (AnalysisPlugin) plugin;
+      if (plugin instanceof AnalysisPlugin analysisPlugin) {
         instance.registerAnalyzers(analysisPlugin.getAnalyzers());
         instance.registerTokenFilters(analysisPlugin.getTokenFilters(), builtInTokenFilters);
         instance.registerCharFilters(analysisPlugin.getCharFilters(), builtInCharFilters);

src/main/java/com/yelp/nrtsearch/server/analysis/MappingV2CharFilterFactory.java

@@ -61,7 +61,7 @@ public class MappingV2CharFilterFactory extends CharFilterFactory {
   /**
    * Initialize this factory via a set of key-value pairs.
    *
-   * @param args
+   * @param args filter arguments
    */
   public MappingV2CharFilterFactory(Map<String, String> args) {
     super(args);

src/main/java/com/yelp/nrtsearch/server/analysis/NrtsearchSynonymParser.java

@@ -90,14 +90,14 @@ public void addInternal(String[] synonyms) throws IOException {
   }
 
   private static String[] split(String s, String separator) {
-    ArrayList<String> list = new ArrayList(2);
+    ArrayList<String> list = new ArrayList<>(2);
     StringBuilder sb = new StringBuilder();
     int pos = 0;
     int end = s.length();
 
     while (pos < end) {
       if (s.startsWith(separator, pos)) {
-        if (sb.length() > 0) {
+        if (!sb.isEmpty()) {
           list.add(sb.toString());
           sb = new StringBuilder();
         }
@@ -118,15 +118,15 @@ private static String[] split(String s, String separator) {
       }
     }
 
-    if (sb.length() > 0) {
+    if (!sb.isEmpty()) {
       list.add(sb.toString());
     }
 
-    return list.toArray(new String[list.size()]);
+    return list.toArray(new String[0]);
   }
 
   private String unescape(String s) {
-    if (s.indexOf("\\") < 0) {
+    if (!s.contains("\\")) {
       return s;
     } else {
       StringBuilder sb = new StringBuilder();

src/main/java/com/yelp/nrtsearch/server/codec/ServerCodec.java

@@ -42,7 +42,7 @@ public PostingsFormat getPostingsFormatForField(String field) {
     IndexState state = stateManager.getCurrent();
     try {
       FieldDef fd = state.getFieldOrThrow(field);
-      if (fd instanceof IndexableFieldDef indexableFieldDef) {
+      if (fd instanceof IndexableFieldDef<?> indexableFieldDef) {
         PostingsFormat postingsFormat = indexableFieldDef.getPostingsFormat();
         if (postingsFormat != null) {
           return postingsFormat;
@@ -65,7 +65,7 @@ public DocValuesFormat getDocValuesFormatForField(String field) {
     IndexState state = stateManager.getCurrent();
     try {
       FieldDef fd = state.getFieldOrThrow(field);
-      if (fd instanceof IndexableFieldDef indexableFieldDef) {
+      if (fd instanceof IndexableFieldDef<?> indexableFieldDef) {
         DocValuesFormat docValuesFormat = indexableFieldDef.getDocValuesFormat();
         if (docValuesFormat != null) {
           return docValuesFormat;
@@ -86,7 +86,7 @@ public KnnVectorsFormat getKnnVectorsFormatForField(String field) {
     IndexState state = stateManager.getCurrent();
     try {
       FieldDef fd = state.getFieldOrThrow(field);
-      if (fd instanceof VectorFieldDef vectorFieldDef) {
+      if (fd instanceof VectorFieldDef<?> vectorFieldDef) {
         KnnVectorsFormat vectorsFormat = vectorFieldDef.getVectorsFormat();
         if (vectorsFormat != null) {
           return vectorsFormat;

src/main/java/com/yelp/nrtsearch/server/config/NrtsearchConfig.java

@@ -418,7 +418,7 @@ public long getMaxConnectionAgeGraceForReplication() {
 
   private static List<String> getPluginSearchPath(Object o) {
     List<String> paths = new ArrayList<>();
-    if (o instanceof List list) {
+    if (o instanceof List<?> list) {
       for (Object item : list) {
         paths.add(item.toString());
       }

src/main/java/com/yelp/nrtsearch/server/config/NumberReaderFunc.java

@@ -40,8 +40,7 @@ public T apply(Object o) {
     if (o instanceof String) {
       return stringConverter.apply((String) o);
     }
-    if (o instanceof Number) {
-      Number num = (Number) o;
+    if (o instanceof Number num) {
       if (clazz.isInstance(num)) {
         return clazz.cast(num);
       }

src/main/java/com/yelp/nrtsearch/server/config/QueryCacheConfig.java

@@ -73,15 +73,19 @@ static long sizeStrToBytes(String sizeStr) {
     long multiplier = 1;
     if (baseStr.length() > 2) {
       String suffix = baseStr.substring(baseStr.length() - 2).toLowerCase();
-      if ("kb".equals(suffix)) {
-        baseStr = baseStr.substring(0, baseStr.length() - 2);
-        multiplier = 1024;
-      } else if ("mb".equals(suffix)) {
-        baseStr = baseStr.substring(0, baseStr.length() - 2);
-        multiplier = 1024 * 1024;
-      } else if ("gb".equals(suffix)) {
-        baseStr = baseStr.substring(0, baseStr.length() - 2);
-        multiplier = 1024 * 1024 * 1024;
+      switch (suffix) {
+        case "kb" -> {
+          baseStr = baseStr.substring(0, baseStr.length() - 2);
+          multiplier = 1024;
+        }
+        case "mb" -> {
+          baseStr = baseStr.substring(0, baseStr.length() - 2);
+          multiplier = 1024 * 1024;
+        }
+        case "gb" -> {
+          baseStr = baseStr.substring(0, baseStr.length() - 2);
+          multiplier = 1024 * 1024 * 1024;
+        }
       }
     }
     if (baseStr.isEmpty()) {

src/main/java/com/yelp/nrtsearch/server/config/ScriptCacheConfig.java

@@ -55,11 +55,8 @@ public static ScriptCacheConfig fromConfig(YamlConfigReader configReader) {
    *     null
    */
   public static TimeUnit getTimeUnitFromString(String timeUnitStr) {
-    TimeUnit timeUnit =
-        TimeUnit.valueOf(
-            Objects.requireNonNull(
-                timeUnitStr, "script cache expiration time unit cannot be null"));
-    return timeUnit;
+    return TimeUnit.valueOf(
+        Objects.requireNonNull(timeUnitStr, "script cache expiration time unit cannot be null"));
   }
 
   /**

src/main/java/com/yelp/nrtsearch/server/config/YamlConfigReader.java

@@ -65,14 +65,14 @@
 public class YamlConfigReader {
   private static final Logger logger = LoggerFactory.getLogger(YamlConfigReader.class.getName());
 
-  private static Function<Object, String> STR_READER =
+  private static final Function<Object, String> STR_READER =
       (node) -> {
         if (!(node instanceof Collection) && !(node instanceof Map)) {
           return node.toString();
         }
         return null;
       };
-  private static Function<Object, Boolean> BOOL_READER =
+  private static final Function<Object, Boolean> BOOL_READER =
       (node) -> {
         if (node instanceof Boolean) {
           return (Boolean) node;
@@ -83,16 +83,16 @@ public class YamlConfigReader {
         }
         return null;
       };
-  private static Function<Object, Integer> INT_READER =
+  private static final Function<Object, Integer> INT_READER =
       new NumberReaderFunc<>(Integer.class, Number::intValue, Integer::parseInt);
-  private static Function<Object, Long> LONG_READER =
+  private static final Function<Object, Long> LONG_READER =
       new NumberReaderFunc<>(Long.class, Number::longValue, Long::parseLong);
-  private static Function<Object, Float> FLOAT_READER =
+  private static final Function<Object, Float> FLOAT_READER =
       new NumberReaderFunc<>(Float.class, Number::floatValue, Float::parseFloat);
-  private static Function<Object, Double> DOUBLE_READER =
+  private static final Function<Object, Double> DOUBLE_READER =
       new NumberReaderFunc<>(Double.class, Number::doubleValue, Double::parseDouble);
 
-  private static String SPLIT_REGEX = "[.]";
+  private static final String SPLIT_REGEX = "[.]";
 
   private final Map<?, ?> configRoot;
 
@@ -496,7 +496,7 @@ public List<String> getKeys(String path) throws ConfigKeyNotFoundException {
       throw new ConfigReadException("Not instance of Map, path: " + path);
     }
     List<String> keys = new ArrayList<>();
-    for (Object mapKey : ((Map) node).keySet()) {
+    for (Object mapKey : ((Map<?, ?>) node).keySet()) {
       if (!(mapKey instanceof String)) {
         throw new ConfigReadException("Map contain non String key: " + mapKey + ", path: " + path);
       }

src/main/java/com/yelp/nrtsearch/server/doc/SegmentDocLookup.java

@@ -81,7 +81,7 @@ public boolean containsKey(Object key) {
     String fieldName = key.toString();
     try {
       FieldDef field = fieldDefLookup.apply(fieldName);
-      return field instanceof IndexableFieldDef && ((IndexableFieldDef) field).hasDocValues();
+      return field instanceof IndexableFieldDef && ((IndexableFieldDef<?>) field).hasDocValues();
     } catch (Exception ignored) {
       return false;
     }
@@ -112,10 +112,9 @@ public LoadedDocValues<?> get(Object key) {
       if (fieldDef == null) {
         throw new IllegalArgumentException("Field does not exist: " + fieldName);
       }
-      if (!(fieldDef instanceof IndexableFieldDef)) {
+      if (!(fieldDef instanceof IndexableFieldDef<?> indexableFieldDef)) {
         throw new IllegalArgumentException("Field cannot have doc values: " + fieldName);
       }
-      IndexableFieldDef indexableFieldDef = (IndexableFieldDef) fieldDef;
       try {
         docValues = indexableFieldDef.getDocValues(context);
       } catch (IOException e) {

src/main/java/com/yelp/nrtsearch/server/facet/DrillSidewaysImpl.java

@@ -212,7 +212,7 @@ private static com.yelp.nrtsearch.server.grpc.FacetResult getScriptFacetResult(
   }
 
   private static com.yelp.nrtsearch.server.grpc.FacetResult getDocValuesFacetResult(
-      Facet facet, FacetsCollector drillDowns, IndexableFieldDef fieldDef) throws IOException {
+      Facet facet, FacetsCollector drillDowns, IndexableFieldDef<?> fieldDef) throws IOException {
     Map<Object, Integer> countsMap = new HashMap<>();
     int totalDocs = 0;
     // get doc values for all match docs, and aggregate counts
@@ -270,7 +270,7 @@ public static com.yelp.nrtsearch.server.grpc.FacetResult buildFacetResultFromCou
     builder.setValue(totalDocs);
     builder.setChildCount(countsMap.size());
 
-    if (countsMap.size() > 0 && facet.getTopN() > 0) {
+    if (!countsMap.isEmpty() && facet.getTopN() > 0) {
       // add all map entries into a priority queue, keeping only the top N
       PriorityQueue<Map.Entry<Object, Integer>> priorityQueue =
           new PriorityQueue<>(
@@ -390,8 +390,7 @@ private static com.yelp.nrtsearch.server.grpc.FacetResult getFieldFacetResult(
           c = drillDowns;
         }
         DoubleRangeFacetCounts doubleRangeFacetCounts;
-        if (fieldDef instanceof VirtualFieldDef) {
-          VirtualFieldDef virtualFieldDef = (VirtualFieldDef) fieldDef;
+        if (fieldDef instanceof VirtualFieldDef virtualFieldDef) {
           doubleRangeFacetCounts =
               new DoubleRangeFacetCounts(
                   virtualFieldDef.getName(), virtualFieldDef.getValuesSource(), c, ranges);
@@ -407,8 +406,7 @@ private static com.yelp.nrtsearch.server.grpc.FacetResult getFieldFacetResult(
                 facet.getPathsList().toArray(new String[facet.getPathsCount()]));
       } else {
         throw new IllegalArgumentException(
-            String.format(
-                "numericRanges must be provided only on field type numeric e.g. int, double, flat"));
+            "numericRanges must be provided only on field type numeric e.g. int, double, flat");
       }
     } else if (fieldDef.getFacetValueType()
         == IndexableFieldDef.FacetValueType.SORTED_SET_DOC_VALUES) {
@@ -486,8 +484,7 @@ private static com.yelp.nrtsearch.server.grpc.FacetResult getFieldFacetResult(
         // counts for this indexFieldName:
         String indexFieldName =
             indexState.getFacetsConfig().getDimConfig(fieldDef.getName()).indexFieldName;
-        Map<String, Facets> facetsMap = indexFieldNameToFacets;
-        luceneFacets = facetsMap.get(indexFieldName);
+        luceneFacets = indexFieldNameToFacets.get(indexFieldName);
         if (luceneFacets == null) {
           if (useCachedOrds) {
             luceneFacets =
@@ -504,7 +501,7 @@ private static com.yelp.nrtsearch.server.grpc.FacetResult getFieldFacetResult(
                     indexState.getFacetsConfig(),
                     drillDowns);
           }
-          facetsMap.put(indexFieldName, luceneFacets);
+          indexFieldNameToFacets.put(indexFieldName, luceneFacets);
         }
       }
       if (facet.getTopN() != 0) {
@@ -517,22 +514,16 @@ private static com.yelp.nrtsearch.server.grpc.FacetResult getFieldFacetResult(
         }
         facetResult =
             new FacetResult(
-                fieldDef.getName(),
-                path,
-                -1,
-                results.toArray(new LabelAndValue[results.size()]),
-                -1);
+                fieldDef.getName(), path, -1, results.toArray(new LabelAndValue[0]), -1);
       } else {
-        throw new IllegalArgumentException(
-            String.format("each facet request must have either topN or labels"));
+        throw new IllegalArgumentException("each facet request must have either topN or labels");
       }
     } else {
       // if no facet type is enabled on the field, try using the field doc values
-      if (!(fieldDef instanceof IndexableFieldDef)) {
+      if (!(fieldDef instanceof IndexableFieldDef<?> indexableFieldDef)) {
         throw new IllegalArgumentException(
             "Doc values facet requires an indexable field : " + fieldName);
       }
-      IndexableFieldDef indexableFieldDef = (IndexableFieldDef) fieldDef;
       if (!indexableFieldDef.hasDocValues()) {
         throw new IllegalArgumentException(
             "Doc values facet requires doc values enabled : " + fieldName);

src/main/java/com/yelp/nrtsearch/server/facet/FacetTopDocs.java

@@ -28,7 +28,6 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.stream.Collectors;
 import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.search.IndexSearcher;
@@ -64,7 +63,7 @@ public static Iterable<FacetResult> facetTopDocsSample(
       Diagnostics.Builder diagnostics)
       throws IOException {
     List<Facet> sampleFacets =
-        facets.stream().filter(facet -> facet.getSampleTopDocs() > 0).collect(Collectors.toList());
+        facets.stream().filter(facet -> facet.getSampleTopDocs() > 0).toList();
     if (sampleFacets.isEmpty()) {
       return Collections.emptyList();
     }
@@ -83,11 +82,10 @@ private static FacetResult facetFromTopDocs(
       TopDocs topDocs, Facet facet, IndexState indexState, IndexSearcher searcher)
       throws IOException {
     FieldDef fieldDef = indexState.getFieldOrThrow(facet.getDim());
-    if (!(fieldDef instanceof IndexableFieldDef)) {
+    if (!(fieldDef instanceof IndexableFieldDef<?> indexableFieldDef)) {
       throw new IllegalArgumentException(
           "Sampling facet field must be indexable: " + facet.getDim());
     }
-    IndexableFieldDef indexableFieldDef = (IndexableFieldDef) fieldDef;
     if (!indexableFieldDef.hasDocValues()) {
       throw new IllegalArgumentException(
           "Sampling facet field must have doc values enabled: " + facet.getDim());

src/main/java/com/yelp/nrtsearch/server/field/ContextSuggestFieldDef.java

@@ -79,8 +79,7 @@ public void parseDocumentField(
    */
   private void parseFieldValueToDocumentField(Document document, String fieldValue) {
     ContextSuggestFieldData csfData = GSON.fromJson(fieldValue, ContextSuggestFieldData.class);
-    CharSequence[] contexts =
-        csfData.getContexts().toArray(new CharSequence[csfData.getContexts().size()]);
+    CharSequence[] contexts = csfData.getContexts().toArray(new CharSequence[0]);
     ContextSuggestField csf =
         new ContextSuggestField(getName(), csfData.getValue(), csfData.getWeight(), contexts);
     document.add(csf);

src/main/java/com/yelp/nrtsearch/server/field/DateTimeFieldDef.java

@@ -57,9 +57,7 @@ private static DateTimeFormatter createDateTimeFormatter(String dateTimeFormat)
     if (dateTimeFormat.equals(EPOCH_MILLIS)) {
       return null;
     } else if (dateTimeFormat.equals(STRICT_DATE_OPTIONAL_TIME)) {
-      /**
-       * This is a replication of {@link DateTimeFormatter#ISO_LOCAL_DATE_TIME} with time optional.
-       */
+      // This is a replication of {@link DateTimeFormatter#ISO_LOCAL_DATE_TIME} with time optional.
       return new DateTimeFormatterBuilder()
           .parseCaseInsensitive()
           .append(DateTimeFormatter.ISO_LOCAL_DATE)
@@ -271,8 +269,7 @@ private long getTimeFromEpochMillisString(String epochMillisString) {
             "%s could not parse %s as date_time with format %s",
             getName(), epochMillisString, dateTimeFormat);
     try {
-      long epochMillis = Long.parseLong(epochMillisString);
-      return epochMillis;
+      return Long.parseLong(epochMillisString);
     } catch (NumberFormatException e) {
       throw new IllegalArgumentException(format, e);
     }

src/main/java/com/yelp/nrtsearch/server/field/FieldDefCreator.java

@@ -122,8 +122,7 @@ private String getCustomFieldType(Map<String, ?> additionalProperties) {
   public static void initialize(NrtsearchConfig configuration, Iterable<Plugin> plugins) {
     instance = new FieldDefCreator(configuration);
     for (Plugin plugin : plugins) {
-      if (plugin instanceof FieldTypePlugin) {
-        FieldTypePlugin fieldTypePlugin = (FieldTypePlugin) plugin;
+      if (plugin instanceof FieldTypePlugin fieldTypePlugin) {
         instance.register(fieldTypePlugin.getFieldTypes());
       }
     }

src/main/java/com/yelp/nrtsearch/server/field/NumberFieldDef.java

@@ -177,7 +177,7 @@ protected FacetValueType parseFacetValueType(Field requestField) {
   /**
    * Convert the string to number
    *
-   * @param numberString
+   * @param numberString number string
    * @return number value of the string
    */
   protected Number parseNumberString(String numberString) {