replace 'static enum' with 'enum' (#36)

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

@@ -70,7 +70,7 @@ import org.apache.lucene.util.fst.FST;
 public final class JapaneseTokenizer extends Tokenizer {
 
   /** Tokenization mode: this determines how the tokenizer handles compound and unknown words. */
-  public static enum Mode {
+  public enum Mode {
     /** Ordinary segmentation: no decomposition for compounds, */
     NORMAL,
 

lucene/analysis/kuromoji/src/java/org/apache/lucene/analysis/ja/dict/CharacterDefinition.java

@@ -34,7 +34,7 @@ public final class CharacterDefinition {
   public static final int CLASS_COUNT = CharacterClass.values().length;
 
   // only used internally for lookup:
-  private static enum CharacterClass {
+  private enum CharacterClass {
     NGRAM,
     DEFAULT,
     SPACE,

lucene/backward-codecs/src/java/org/apache/lucene/backward_codecs/lucene50/Lucene50StoredFieldsFormat.java

@@ -105,7 +105,7 @@ import org.apache.lucene.util.packed.DirectMonotonicWriter;
 public class Lucene50StoredFieldsFormat extends StoredFieldsFormat {
 
   /** Configuration option for stored fields. */
-  public static enum Mode {
+  public enum Mode {
     /** Trade compression ratio for retrieval speed. */
     BEST_SPEED,
     /** Trade retrieval speed for compression ratio. */

lucene/backward-codecs/src/java/org/apache/lucene/backward_codecs/lucene80/Lucene80DocValuesFormat.java

@@ -140,7 +140,7 @@ import org.apache.lucene.util.packed.DirectWriter;
 public final class Lucene80DocValuesFormat extends DocValuesFormat {
 
   /** Configuration option for doc values. */
-  public static enum Mode {
+  public enum Mode {
     /** Trade compression ratio for retrieval speed. */
     BEST_SPEED,
     /** Trade retrieval speed for compression ratio. */

lucene/backward-codecs/src/java/org/apache/lucene/backward_codecs/lucene87/Lucene87Codec.java

@@ -55,7 +55,7 @@ import org.apache.lucene.codecs.perfield.PerFieldPostingsFormat;
 public class Lucene87Codec extends Codec {
 
   /** Configuration option for the codec. */
-  public static enum Mode {
+  public enum Mode {
     /** Trade compression ratio for retrieval speed. */
     BEST_SPEED(Lucene87StoredFieldsFormat.Mode.BEST_SPEED, Lucene80DocValuesFormat.Mode.BEST_SPEED),
     /** Trade retrieval speed for compression ratio. */

lucene/backward-codecs/src/java/org/apache/lucene/backward_codecs/lucene87/Lucene87StoredFieldsFormat.java

@@ -103,7 +103,7 @@ import org.apache.lucene.util.packed.DirectMonotonicWriter;
 public class Lucene87StoredFieldsFormat extends StoredFieldsFormat {
 
   /** Configuration option for stored fields. */
-  public static enum Mode {
+  public enum Mode {
     /** Trade compression ratio for retrieval speed. */
     BEST_SPEED,
     /** Trade retrieval speed for compression ratio. */

lucene/core/src/java/org/apache/lucene/analysis/package-info.java

@@ -782,7 +782,7 @@
  *
  * <pre class="prettyprint">
  *   public interface PartOfSpeechAttribute extends Attribute {
- *     public static enum PartOfSpeech {
+ *     public enum PartOfSpeech {
  *       Noun, Verb, Adjective, Adverb, Pronoun, Preposition, Conjunction, Article, Unknown
  *     }
  *

lucene/core/src/java/org/apache/lucene/codecs/lucene90/Lucene90Codec.java

@@ -46,7 +46,7 @@ import org.apache.lucene.codecs.perfield.PerFieldPostingsFormat;
 public class Lucene90Codec extends Codec {
 
   /** Configuration option for the codec. */
-  public static enum Mode {
+  public enum Mode {
     /** Trade compression ratio for retrieval speed. */
     BEST_SPEED(Lucene90StoredFieldsFormat.Mode.BEST_SPEED, Lucene90DocValuesFormat.Mode.BEST_SPEED),
     /** Trade retrieval speed for compression ratio. */

lucene/core/src/java/org/apache/lucene/codecs/lucene90/Lucene90DocValuesFormat.java

@@ -140,7 +140,7 @@ import org.apache.lucene.util.packed.DirectWriter;
 public final class Lucene90DocValuesFormat extends DocValuesFormat {
 
   /** Configuration option for doc values. */
-  public static enum Mode {
+  public enum Mode {
     /** Trade compression ratio for retrieval speed. */
     BEST_SPEED,
     /** Trade retrieval speed for compression ratio. */

lucene/core/src/java/org/apache/lucene/codecs/lucene90/Lucene90StoredFieldsFormat.java

@@ -103,7 +103,7 @@ import org.apache.lucene.util.packed.DirectMonotonicWriter;
 public class Lucene90StoredFieldsFormat extends StoredFieldsFormat {
 
   /** Configuration option for stored fields. */
-  public static enum Mode {
+  public enum Mode {
     /** Trade compression ratio for retrieval speed. */
     BEST_SPEED,
     /** Trade retrieval speed for compression ratio. */

lucene/core/src/java/org/apache/lucene/document/DateTools.java

@@ -169,7 +169,7 @@ public class DateTools {
   }
 
   /** Specifies the time granularity. */
-  public static enum Resolution {
+  public enum Resolution {
 
     /** Limit a date's resolution to year granularity. */
     YEAR(4),

lucene/core/src/java/org/apache/lucene/document/Field.java

@@ -579,7 +579,7 @@ public class Field implements IndexableField {
   }
 
   /** Specifies whether and how a field should be stored. */
-  public static enum Store {
+  public enum Store {
 
     /**
      * Store the original field value in the index. This is useful for short texts like a document's

lucene/core/src/java/org/apache/lucene/index/FilteredTermsEnum.java

@@ -47,7 +47,7 @@ public abstract class FilteredTermsEnum extends TermsEnum {
    *
    * @see #accept(BytesRef)
    */
-  protected static enum AcceptStatus {
+  protected enum AcceptStatus {
     /** Accept the term and position the enum at the next term. */
     YES,
     /**

lucene/core/src/java/org/apache/lucene/index/IndexWriterConfig.java

@@ -53,7 +53,7 @@ import org.apache.lucene.util.Version;
 public final class IndexWriterConfig extends LiveIndexWriterConfig {
 
   /** Specifies the open mode for {@link IndexWriter}. */
-  public static enum OpenMode {
+  public enum OpenMode {
     /** Creates a new index or overwrites an existing one. */
     CREATE,
 

lucene/core/src/java/org/apache/lucene/index/StoredFieldVisitor.java

@@ -69,7 +69,7 @@ public abstract class StoredFieldVisitor {
   public abstract Status needsField(FieldInfo fieldInfo) throws IOException;
 
   /** Enumeration of possible return values for {@link #needsField}. */
-  public static enum Status {
+  public enum Status {
     /** YES: the field should be visited. */
     YES,
     /** NO: don't visit this field, but continue processing fields for this document. */

lucene/core/src/java/org/apache/lucene/search/BooleanClause.java

@@ -22,7 +22,7 @@ import java.util.Objects;
 public final class BooleanClause {
 
   /** Specifies how clauses are to occur in matching documents. */
-  public static enum Occur {
+  public enum Occur {
 
     /** Use this operator for clauses that <i>must</i> appear in the matching documents. */
     MUST {

lucene/core/src/java/org/apache/lucene/search/SortField.java

@@ -48,7 +48,7 @@ import org.apache.lucene.util.NumericUtils;
 public class SortField {
 
   /** Specifies the type of the terms to be sorted, or special types such as CUSTOM */
-  public static enum Type {
+  public enum Type {
 
     /**
      * Sort by document score (relevance). Sort values are Float and higher values are at the front.

lucene/core/src/java/org/apache/lucene/search/spans/FilterSpans.java

@@ -209,7 +209,7 @@ public abstract class FilterSpans extends Spans {
    * Status returned from {@link FilterSpans#accept(Spans)} that indicates whether a candidate match
    * should be accepted, rejected, or rejected and move on to the next document.
    */
-  public static enum AcceptStatus {
+  public enum AcceptStatus {
     /** Indicates the match should be accepted */
     YES,
 

lucene/expressions/src/java/org/apache/lucene/expressions/js/VariableContext.java

@@ -26,7 +26,7 @@ import java.util.List;
 public class VariableContext {
 
   /** Represents what a piece of a variable does. */
-  public static enum Type {
+  public enum Type {
     /** A member of the previous context (ie "dot" access). */
     MEMBER,
 

lucene/queries/src/java/org/apache/lucene/queries/payloads/SpanPayloadCheckQuery.java

@@ -49,7 +49,7 @@ public class SpanPayloadCheckQuery extends SpanQuery {
   protected final MatchOperation operation;
   protected final PayloadType payloadType;
   /** The payload type. This specifies the decoding of the ByteRef for the payload. */
-  public static enum PayloadType {
+  public enum PayloadType {
     /** INT is for a 4 byte payload that is a packed integer */
     INT,
     /** FLOAT is a 4 byte payload decoded to a float(32bit). */
@@ -59,7 +59,7 @@ public class SpanPayloadCheckQuery extends SpanQuery {
   };
 
   /** The payload type. This specifies the decoding of the ByteRef for the payload. */
-  public static enum MatchOperation {
+  public enum MatchOperation {
     /** Checks for binary equality of the byte array (default) */
     EQ,
     /** GT Matches if the payload value is greater than the reference */

lucene/queryparser/src/java/org/apache/lucene/queryparser/flexible/standard/config/StandardQueryConfigHandler.java

@@ -183,7 +183,7 @@ public class StandardQueryConfigHandler extends QueryConfigHandler {
   }
 
   /** Boolean Operator: AND or OR */
-  public static enum Operator {
+  public enum Operator {
     AND,
     OR;
   }

lucene/suggest/src/java/org/apache/lucene/search/suggest/analyzing/BlendedInfixSuggester.java

@@ -69,7 +69,7 @@ public class BlendedInfixSuggester extends AnalyzingInfixSuggester {
   private final BlenderType blenderType;
 
   /** The different types of blender. */
-  public static enum BlenderType {
+  public enum BlenderType {
     /** Application dependent; override {@link #calculateCoefficient} to compute it. */
     CUSTOM,
     /** weight*(1 - 0.10*position) */

lucene/test-framework/src/java/org/apache/lucene/analysis/MockTokenizer.java

@@ -71,7 +71,7 @@ public class MockTokenizer extends Tokenizer {
   // TODO: "register" with LuceneTestCase to ensure all streams are closed() ?
   // currently, we can only check that the lifecycle is correct if someone is reusing,
   // but not for "one-offs".
-  private static enum State {
+  private enum State {
     SETREADER, // consumer set a reader input either via ctor or via reset(Reader)
     RESET, // consumer has called reset()
     INCREMENT, // consumer is consuming, has called incrementToken() == true

lucene/test-framework/src/java/org/apache/lucene/index/AlcoholicMergePolicy.java

@@ -63,7 +63,7 @@ public class AlcoholicMergePolicy extends LogMergePolicy {
     return info.sizeInBytes();
   }
 
-  private static enum Drink {
+  private enum Drink {
     Beer(15),
     Wine(17),
     Champagne(21),

lucene/test-framework/src/java/org/apache/lucene/index/AssertingLeafReader.java

@@ -349,7 +349,7 @@ public class AssertingLeafReader extends FilterLeafReader {
     }
   }
 
-  static enum DocsEnumState {
+  enum DocsEnumState {
     START,
     ITERATING,
     FINISHED

lucene/test-framework/src/java/org/apache/lucene/search/AssertingScorer.java

@@ -24,7 +24,7 @@ import java.util.Random;
 /** Wraps a Scorer with additional checks */
 public class AssertingScorer extends Scorer {
 
-  static enum IteratorState {
+  enum IteratorState {
     APPROXIMATING,
     ITERATING,
     SHALLOW_ADVANCING,

lucene/test-framework/src/java/org/apache/lucene/search/spans/AssertingSpans.java

@@ -26,7 +26,7 @@ class AssertingSpans extends Spans {
   int doc = -1;
 
   /** tracks current state of this spans */
-  static enum State {
+  enum State {
     /** document iteration has not yet begun ({@link #docID()} = -1) */
     DOC_START,
 

lucene/test-framework/src/java/org/apache/lucene/store/MockDirectoryWrapper.java

@@ -170,7 +170,7 @@ public class MockDirectoryWrapper extends BaseDirectoryWrapper {
    *
    * <p>WARNING: can make tests very slow.
    */
-  public static enum Throttling {
+  public enum Throttling {
     /** always emulate a slow hard disk. could be very slow! */
     ALWAYS,
     /** sometimes (0.5% of the time) emulate a slow hard disk. */
@@ -756,7 +756,7 @@ public class MockDirectoryWrapper extends BaseDirectoryWrapper {
     return maybeThrottle(name, io);
   }
 
-  private static enum Handle {
+  private enum Handle {
     Input,
     Output,
     Slice