Upgrade checkstyle to version 7.5

This commit upgrades the checkstyle configuration from version 5.9 to
version 7.5, the latest version as of today. The main enhancement
obtained via this upgrade is better detection of redundant modifiers.

Relates #22960

3 files changed, 5 insertions, 5 deletions

diff --git a/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggester.java b/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggester.java
index 625458f2c9..b048977741 100644
--- a/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggester.java
+++ b/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggester.java
@@ -108,7 +108,7 @@ public class CompletionSuggester extends Suggester<CompletionSuggestionContext>
 
             private List<TopSuggestDocs.SuggestScoreDoc> suggestScoreDocs;
 
-            public SuggestDoc(int doc, CharSequence key, CharSequence context, float score) {
+            SuggestDoc(int doc, CharSequence key, CharSequence context, float score) {
                 super(doc, key, context, score);
             }
 
@@ -152,7 +152,7 @@ public class CompletionSuggester extends Suggester<CompletionSuggestionContext>
 
         private static final class SuggestDocPriorityQueue extends PriorityQueue<SuggestDoc> {
 
-            public SuggestDocPriorityQueue(int maxSize) {
+            SuggestDocPriorityQueue(int maxSize) {
                 super(maxSize);
             }
 
@@ -184,7 +184,7 @@ public class CompletionSuggester extends Suggester<CompletionSuggestionContext>
         private final SuggestDocPriorityQueue pq;
         private final Map<Integer, SuggestDoc> scoreDocMap;
 
-        public TopDocumentsCollector(int num) {
+        TopDocumentsCollector(int num) {
             super(1); // TODO hack, we don't use the underlying pq, so we allocate a size of 1
             this.num = num;
             this.scoreDocMap = new LinkedHashMap<>(num);
diff --git a/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggestionBuilder.java b/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggestionBuilder.java
index 7ef1a000e4..91dfd51099 100644
--- a/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggestionBuilder.java
+++ b/core/src/main/java/org/elasticsearch/search/suggest/completion/CompletionSuggestionBuilder.java
@@ -210,7 +210,7 @@ public class CompletionSuggestionBuilder extends SuggestionBuilder<CompletionSug
     private static class InnerBuilder extends CompletionSuggestionBuilder {
         private String field;
 
-        public InnerBuilder() {
+        InnerBuilder() {
             super("_na_");
         }
 
diff --git a/core/src/main/java/org/elasticsearch/search/suggest/completion/context/ContextMappings.java b/core/src/main/java/org/elasticsearch/search/suggest/completion/context/ContextMappings.java
index 5a7cfccf31..0cac17dbb8 100644
--- a/core/src/main/java/org/elasticsearch/search/suggest/completion/context/ContextMappings.java
+++ b/core/src/main/java/org/elasticsearch/search/suggest/completion/context/ContextMappings.java
@@ -115,7 +115,7 @@ public class ContextMappings implements ToXContent {
         private final Map<String, Set<CharSequence>> contexts;
         private final ParseContext.Document document;
 
-        public TypedContextField(String name, String value, int weight, Map<String, Set<CharSequence>> contexts,
+        TypedContextField(String name, String value, int weight, Map<String, Set<CharSequence>> contexts,
                                  ParseContext.Document document) {
             super(name, value, weight);
             this.contexts = contexts;