Remove redundant field initializers (#13060)

Make protected fields in final classes private.

Author: sabi0

lucene/analysis/common/src/java/org/apache/lucene/analysis/minhash/MinHashFilter.java

@@ -59,11 +59,11 @@ public class MinHashFilter extends TokenFilter {
 
   private final List<List<FixedSizeTreeSet<LongPair>>> minHashSets;
 
-  private int hashSetSize = DEFAULT_HASH_SET_SIZE;
+  private final int hashSetSize;
 
-  private int bucketCount = DEFAULT_BUCKET_COUNT;
+  private final int bucketCount;
 
-  private int hashCount = DEFAULT_HASH_COUNT;
+  private final int hashCount;
 
   private boolean requiresInitialisation = true;
 

lucene/analysis/common/src/java/org/apache/lucene/analysis/minhash/MinHashFilterFactory.java

@@ -32,13 +32,13 @@ public class MinHashFilterFactory extends TokenFilterFactory {
   /** SPI name */
   public static final String NAME = "minHash";
 
-  private int hashCount = MinHashFilter.DEFAULT_HASH_COUNT;
+  private final int hashCount;
 
-  private int bucketCount = MinHashFilter.DEFAULT_BUCKET_COUNT;
+  private final int bucketCount;
 
-  private int hashSetSize = MinHashFilter.DEFAULT_HASH_SET_SIZE;
+  private final int hashSetSize;
 
-  private boolean withRotation;
+  private final boolean withRotation;
 
   /** Create a {@link MinHashFilterFactory}. */
   public MinHashFilterFactory(Map<String, String> args) {

lucene/analysis/common/src/java/org/apache/lucene/analysis/miscellaneous/WordDelimiterGraphFilterFactory.java

@@ -67,7 +67,7 @@ public class WordDelimiterGraphFilterFactory extends TokenFilterFactory
   private final int flags;
   byte[] typeTable = null;
   private CharArraySet protectedWords = null;
-  private boolean adjustOffsets = false;
+  private final boolean adjustOffsets;
 
   /** Creates a new WordDelimiterGraphFilterFactory */
   public WordDelimiterGraphFilterFactory(Map<String, String> args) {

lucene/analysis/common/src/java/org/apache/lucene/analysis/nl/DutchAnalyzer.java

@@ -89,7 +89,7 @@ private static class DefaultSetHolder {
   private final CharArraySet stoptable;
 
   /** Contains words that should be indexed but not stemmed. */
-  private CharArraySet excltable = CharArraySet.EMPTY_SET;
+  private final CharArraySet excltable;
 
   private final StemmerOverrideMap stemdict;
 

lucene/analysis/common/src/java/org/apache/lucene/analysis/pattern/PatternCaptureGroupFilterFactory.java

@@ -41,8 +41,8 @@ public class PatternCaptureGroupFilterFactory extends TokenFilterFactory {
   /** SPI name */
   public static final String NAME = "patternCaptureGroup";
 
-  private Pattern pattern;
-  private boolean preserveOriginal = true;
+  private final Pattern pattern;
+  private final boolean preserveOriginal;
 
   public PatternCaptureGroupFilterFactory(Map<String, String> args) {
     super(args);

lucene/analysis/kuromoji/src/java/org/apache/lucene/analysis/ja/JapaneseTokenizerFactory.java

@@ -114,7 +114,7 @@ public class JapaneseTokenizerFactory extends TokenizerFactory implements Resour
    * /箱根山-箱根/成田空港-成田/ requests "箱根" and "成田" to be in the result in NBEST output.
    */
   private final String nbestExamples;
-  private int nbestCost = -1;
+  private int nbestCost;
 
   /** Creates a new JapaneseTokenizerFactory */
   public JapaneseTokenizerFactory(Map<String, String> args) {

lucene/analysis/opennlp/src/java/org/apache/lucene/analysis/opennlp/OpenNLPTokenizer.java

@@ -44,7 +44,7 @@ public final class OpenNLPTokenizer extends SegmentingTokenizerBase {
   private int sentenceStart = 0;
   private int sentenceIndex = -1;
 
-  private NLPTokenizerOp tokenizerOp = null;
+  private final NLPTokenizerOp tokenizerOp;
 
   public OpenNLPTokenizer(
       AttributeFactory factory, NLPSentenceDetectorOp sentenceOp, NLPTokenizerOp tokenizerOp)

lucene/analysis/opennlp/src/java/org/apache/lucene/analysis/opennlp/tools/NLPChunkerOp.java

@@ -23,7 +23,7 @@
 
 /** Supply OpenNLP Chunking tool Requires binary models from OpenNLP project on SourceForge. */
 public class NLPChunkerOp {
-  private ChunkerME chunker = null;
+  private final ChunkerME chunker;
 
   public NLPChunkerOp(ChunkerModel chunkerModel) throws IOException {
     chunker = new ChunkerME(chunkerModel);

lucene/analysis/opennlp/src/java/org/apache/lucene/analysis/opennlp/tools/NLPPOSTaggerOp.java

@@ -27,7 +27,7 @@
  * SourceForge.
  */
 public class NLPPOSTaggerOp {
-  private POSTagger tagger = null;
+  private final POSTagger tagger;
 
   public NLPPOSTaggerOp(POSModel model) throws IOException {
     tagger = new POSTaggerME(model);

lucene/analysis/phonetic/src/java/org/apache/lucene/analysis/phonetic/DaitchMokotoffSoundexFilter.java

@@ -32,10 +32,10 @@
  */
 public final class DaitchMokotoffSoundexFilter extends TokenFilter {
   /** true if encoded tokens should be added as synonyms */
-  protected boolean inject = true;
+  private final boolean inject;
 
   /** phonetic encoder */
-  protected DaitchMokotoffSoundex encoder = new DaitchMokotoffSoundex();
+  private final DaitchMokotoffSoundex encoder = new DaitchMokotoffSoundex();
 
   // output is a string such as ab|ac|...
   private static final Pattern pattern = Pattern.compile("([^|]+)");