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nfsantos pushed a commit to branch trunk
in repository https://gitbox.apache.org/repos/asf/jackrabbit-oak.git


The following commit(s) were added to refs/heads/trunk by this push:
     new 38d503ff17 OAK-11778 - Cleanups, reduce compilation warnings (#2355)
38d503ff17 is described below

commit 38d503ff172dbd810fb8ca3563e06380fe2ebfec
Author: Nuno Santos <nsan...@adobe.com>
AuthorDate: Thu Jul 3 08:08:42 2025 +0200

    OAK-11778 - Cleanups, reduce compilation warnings (#2355)
---
 .../org/apache/jackrabbit/oak/query/QueryImpl.java |  32 +++---
 .../apache/jackrabbit/oak/query/QueryOptions.java  |   2 +-
 .../apache/jackrabbit/oak/query/ResultImpl.java    |  14 +--
 .../apache/jackrabbit/oak/query/ResultRowImpl.java |  52 +++++-----
 .../jackrabbit/oak/jcr/query/PrefetchIterator.java |   6 +-
 .../apache/jackrabbit/oak/jcr/query/QueryImpl.java |   9 +-
 .../jackrabbit/oak/jcr/query/QueryManagerImpl.java |  10 +-
 .../jackrabbit/oak/jcr/query/QueryResultImpl.java  | 114 +++++++++++----------
 .../apache/jackrabbit/oak/jcr/query/RowImpl.java   |   4 +-
 .../index/lucene/LuceneIndexEditor2Test.java       |  42 +++-----
 .../lucene/LuceneIndexEditorProviderTest.java      |  89 ++++++++--------
 .../index/lucene/LuceneIndexEditorTest.java        |   6 +-
 .../index/lucene/LuceneIndexPlannerCommonTest.java |   2 +-
 .../lucene/LuceneIndexProviderServiceTest.java     |   5 +-
 .../index/lucene/LuceneIndexQueryCommonTest.java   |   2 +-
 .../oak/plugins/index/lucene/LuceneIndexTest.java  |   2 +-
 .../index/lucene/LucenePropertyIndexTest.java      |  44 ++++----
 .../index/search/spi/query/FulltextIndex.java      |   4 +-
 18 files changed, 207 insertions(+), 232 deletions(-)

diff --git 
a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryImpl.java 
b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryImpl.java
index 35ada0ad68..776629dd85 100644
--- a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryImpl.java
+++ b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryImpl.java
@@ -128,17 +128,17 @@ public class QueryImpl implements Query {
 
     SourceImpl source;
     private String statement;
-    final HashMap<String, PropertyValue> bindVariableMap = new HashMap<String, 
PropertyValue>();
+    final HashMap<String, PropertyValue> bindVariableMap = new HashMap<>();
     
     /**
      * The map of indexes (each selector uses one index)
      */
-    final HashMap<String, Integer> selectorIndexes = new HashMap<String, 
Integer>();
+    final HashMap<String, Integer> selectorIndexes = new HashMap<>();
     
     /**
      * The list of selectors of this query. For a join, there can be multiple 
selectors.
      */
-    final ArrayList<SelectorImpl> selectors = new ArrayList<SelectorImpl>();
+    final ArrayList<SelectorImpl> selectors = new ArrayList<>();
     
     ConstraintImpl constraint;
 
@@ -603,7 +603,7 @@ public class QueryImpl implements Query {
                                     .replaceFirst("(?i)\\bexplain\\s+", ""))
                     },
                     null, null);
-            return Arrays.asList(r).iterator();
+            return List.of(r).iterator();
         }
         if (LOG.isDebugEnabled()) {
             logDebug("query execute " + statement);
@@ -731,13 +731,13 @@ public class QueryImpl implements Query {
 
         // use a greedy algorithm
         SourceImpl result = null;
-        Set<SourceImpl> available = new HashSet<SourceImpl>();
+        Set<SourceImpl> available = new HashSet<>();
         // the query is only slow if all possible join orders are slow
         // (in theory, due to using the greedy algorithm, a query might be 
considered
         // slow even thought there is a plan that doesn't need to use 
traversal, but
         // only for 3-way and higher joins, and only if traversal is 
considered very fast)
         boolean isPotentiallySlowJoin = true;
-        while (sources.size() > 0) {
+        while (!sources.isEmpty()) {
             int bestIndex = 0;
             double bestCost = Double.POSITIVE_INFINITY;
             ExecutionPlan bestPlan = null;
@@ -776,10 +776,8 @@ public class QueryImpl implements Query {
             return last;
         }
         List<SourceImpl> selectors = result.getInnerJoinSelectors();
-        Set<SourceImpl> oldSelectors = new HashSet<SourceImpl>();
-        oldSelectors.addAll(selectors);
-        Set<SourceImpl> newSelectors = new HashSet<SourceImpl>();
-        newSelectors.addAll(selectors);
+        Set<SourceImpl> oldSelectors = new HashSet<>(selectors);
+        Set<SourceImpl> newSelectors = new HashSet<>(selectors);
         newSelectors.add(last);
         for (JoinConditionImpl j : conditions) {
             // only join conditions can now be evaluated,
@@ -809,9 +807,9 @@ public class QueryImpl implements Query {
      * query iterator to lazily execute and return counts.
      */
     abstract static class MeasuringIterator extends 
AbstractIterator<ResultRowImpl> {
-        private Iterator<ResultRowImpl> delegate;
-        private Query query;
-        private List<ResultRowImpl> results;
+        private final Iterator<ResultRowImpl> delegate;
+        private final Query query;
+        private final List<ResultRowImpl> results;
         private boolean init;
 
         MeasuringIterator(Query query, Iterator<ResultRowImpl> delegate) {
@@ -1049,7 +1047,7 @@ public class QueryImpl implements Query {
 
     @Override
     public List<String> getBindVariableNames() {
-        return new ArrayList<String>(bindVariableMap.keySet());
+        return new ArrayList<>(bindVariableMap.keySet());
     }
 
     @Override
@@ -1292,7 +1290,7 @@ public class QueryImpl implements Query {
         if (orderings == null) {
             return null;
         }
-        ArrayList<OrderEntry> sortOrder = new ArrayList<OrderEntry>();
+        ArrayList<OrderEntry> sortOrder = new ArrayList<>();
         for (OrderingImpl o : orderings) {
             DynamicOperandImpl op = o.getOperand();
             OrderEntry e = op.getOrderEntry(filter.getSelector(), o);
@@ -1301,7 +1299,7 @@ public class QueryImpl implements Query {
             }
             sortOrder.add(e);
         }
-        if (sortOrder.size() == 0) {
+        if (sortOrder.isEmpty()) {
             return null;
         }
         return sortOrder;
@@ -1501,7 +1499,7 @@ public class QueryImpl implements Query {
         } else {
             recomputed.append(original.substring(0, origUpper.indexOf(where) + 
whereOffset));
             recomputed.append(query.getConstraint());
-            if (origUpper.indexOf(orderBy) > -1) {
+            if (origUpper.contains(orderBy)) {
                 
recomputed.append(original.substring(origUpper.indexOf(orderBy)));
             }
         }
diff --git 
a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryOptions.java 
b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryOptions.java
index 1edde3b04e..d4689c987b 100644
--- a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryOptions.java
+++ b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryOptions.java
@@ -50,7 +50,7 @@ public class QueryOptions {
         FAIL,
         // the default setting
         DEFAULT
-    };
+    }
 
     public QueryOptions() {
     }
diff --git 
a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultImpl.java 
b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultImpl.java
index aa7b17c114..f2c5cdfb5f 100644
--- a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultImpl.java
+++ b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultImpl.java
@@ -17,7 +17,6 @@
 package org.apache.jackrabbit.oak.query;
 
 import java.util.ArrayList;
-import java.util.Iterator;
 
 import org.apache.jackrabbit.oak.api.Result;
 import org.apache.jackrabbit.oak.api.ResultRow;
@@ -47,7 +46,7 @@ public class ResultImpl implements Result {
     
     @Override
     public String[] getColumnSelectorNames() {
-        ArrayList<String> list = new ArrayList<String>();
+        ArrayList<String> list = new ArrayList<>();
         for (ColumnImpl c : query.getColumns()) {
             SelectorImpl selector = c.getSelector();
             String name = selector == null ? null : selector.getSelectorName();
@@ -55,7 +54,7 @@ public class ResultImpl implements Result {
                 list.add(name);
             }
         }
-        return list.toArray(new String[list.size()]);
+        return list.toArray(new String[0]);
     }
 
     @Override
@@ -65,14 +64,7 @@ public class ResultImpl implements Result {
 
     @Override
     public Iterable<? extends ResultRow> getRows() {
-        return new Iterable<ResultRowImpl>() {
-
-            @Override
-            public Iterator<ResultRowImpl> iterator() {
-                return query.getRows();
-            }
-
-        };
+        return (Iterable<ResultRowImpl>) query::getRows;
     }
 
     @Override
diff --git 
a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultRowImpl.java 
b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultRowImpl.java
index a2337abb7b..cb7a372fcc 100644
--- a/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultRowImpl.java
+++ b/oak-core/src/main/java/org/apache/jackrabbit/oak/query/ResultRowImpl.java
@@ -229,44 +229,40 @@ public class ResultRowImpl implements ResultRow {
         if (orderings == null) {
             return null;
         }
-        return new Comparator<ResultRowImpl>() {
-
-            @Override
-            public int compare(ResultRowImpl o1, ResultRowImpl o2) {
-                PropertyValue[] orderValues = o1.getOrderValues();
-                PropertyValue[] orderValues2 = o2.getOrderValues();
-                int comp = 0;
-                for (int i = 0, size = orderings.length; i < size; i++) {
-                    PropertyValue a = orderValues[i];
-                    PropertyValue b = orderValues2[i];
-                    if (a == null || b == null) {
-                        if (a == b) {
-                            comp = 0;
-                        } else if (a == null) {
-                            // TODO order by: nulls first (it looks like), or
-                            // low?
-                            comp = -1;
-                        } else {
-                            comp = 1;
-                        }
+        return (o1, o2) -> {
+            PropertyValue[] orderValues = o1.getOrderValues();
+            PropertyValue[] orderValues2 = o2.getOrderValues();
+            int comp = 0;
+            for (int i = 0, size = orderings.length; i < size; i++) {
+                PropertyValue a = orderValues[i];
+                PropertyValue b = orderValues2[i];
+                if (a == null || b == null) {
+                    if (a == b) {
+                        comp = 0;
+                    } else if (a == null) {
+                        // TODO order by: nulls first (it looks like), or
+                        // low?
+                        comp = -1;
                     } else {
-                        comp = a.compareTo(b);
+                        comp = 1;
                     }
-                    if (comp != 0) {
-                        if (orderings[i].isDescending()) {
-                            comp = -comp;
-                        }
-                        break;
+                } else {
+                    comp = a.compareTo(b);
+                }
+                if (comp != 0) {
+                    if (orderings[i].isDescending()) {
+                        comp = -comp;
                     }
+                    break;
                 }
-                return comp;
             }
+            return comp;
         };
 
     }
 
     static ResultRowImpl getMappingResultRow(ResultRowImpl delegate, final 
Map<String, String> columnToFacetMap) {
-        if (columnToFacetMap.size() == 0) {
+        if (columnToFacetMap.isEmpty()) {
             return delegate;
         }
 
diff --git 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/PrefetchIterator.java
 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/PrefetchIterator.java
index 02c6982e3f..a557ff1d39 100644
--- 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/PrefetchIterator.java
+++ 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/PrefetchIterator.java
@@ -110,7 +110,7 @@ public class PrefetchIterator<K> implements Iterator<K> {
             }
         }
         prefetchDone = true;
-        ArrayList<K> list = new ArrayList<K>();
+        ArrayList<K> list = new ArrayList<>();
         long end;
         if (timeout <= 0) {
             end = 0;
@@ -134,7 +134,7 @@ public class PrefetchIterator<K> implements Iterator<K> {
             position++;
             list.add(it.next());
         }
-        if (list.size() > 0) {
+        if (!list.isEmpty()) {
             prefetchIterator = list.iterator();
             position -= list.size();
         }
@@ -176,7 +176,7 @@ public class PrefetchIterator<K> implements Iterator<K> {
         long size;
         
         /**
-         * Whether or not the expected size should be read from the result.
+         * Whether the expected size should be read from the result.
          */
         boolean fastSize;
         
diff --git 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryImpl.java 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryImpl.java
index 8a6e26a565..97403f1a89 100644
--- a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryImpl.java
+++ b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryImpl.java
@@ -28,7 +28,6 @@ import javax.jcr.PathNotFoundException;
 import javax.jcr.RepositoryException;
 import javax.jcr.Value;
 import javax.jcr.ValueFactory;
-import javax.jcr.query.InvalidQueryException;
 import javax.jcr.query.Query;
 import javax.jcr.query.QueryResult;
 import javax.jcr.version.VersionException;
@@ -48,7 +47,7 @@ public class QueryImpl implements Query {
 
     private final SessionContext sessionContext;
     private final QueryManagerImpl manager;
-    private final HashMap<String, Value> bindVariableMap = new HashMap<String, 
Value>();
+    private final HashMap<String, Value> bindVariableMap = new HashMap<>();
     private final String language;
     private final String statement;
     private Optional<Long> limit = Optional.empty();
@@ -76,12 +75,12 @@ public class QueryImpl implements Query {
         bindVariableMap.put(varName, value);
     }
 
-    private void parse() throws InvalidQueryException, RepositoryException {
+    private void parse() throws RepositoryException {
         if (parsed) {
             return;
         }
         List<String> names = sessionContext.getSessionDelegate().perform(
-                new SessionOperation<List<String>>("parse") {
+                new SessionOperation<>("parse") {
                     @NotNull
                     @Override
                     public List<String> perform() throws RepositoryException {
@@ -98,7 +97,7 @@ public class QueryImpl implements Query {
     @Override
     public QueryResult execute() throws RepositoryException {
         return sessionContext.getSessionDelegate().perform(
-                new SessionOperation<QueryResult>("execute") {
+                new SessionOperation<>("execute") {
                     @NotNull
                     @Override
                     public QueryResult perform() throws RepositoryException {
diff --git 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryManagerImpl.java
 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryManagerImpl.java
index 1da93f62c8..b169e3ebdb 100644
--- 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryManagerImpl.java
+++ 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryManagerImpl.java
@@ -63,7 +63,7 @@ public class QueryManagerImpl implements QueryManager {
     private final SessionContext sessionContext;
     private final QueryObjectModelFactoryImpl qomFactory;
     private final QueryEngine queryEngine;
-    private final HashSet<String> supportedQueryLanguages = new 
HashSet<String>();
+    private final HashSet<String> supportedQueryLanguages = new HashSet<>();
     private final MeterStats queryCount;
     private final TimerStats queryDuration;
 
@@ -103,13 +103,13 @@ public class QueryManagerImpl implements QueryManager {
     }
 
     @Override
-    public String[] getSupportedQueryLanguages() throws RepositoryException {
-        ArrayList<String> list = new 
ArrayList<String>(queryEngine.getSupportedQueryLanguages());
+    public String[] getSupportedQueryLanguages() {
+        ArrayList<String> list = new 
ArrayList<>(queryEngine.getSupportedQueryLanguages());
         // JQOM is supported in this level only (converted to JCR_SQL2)
         list.add(Query.JCR_JQOM);
         // create a new instance each time because the array is mutable
         // (the caller could modify it)
-        return list.toArray(new String[list.size()]);
+        return list.toArray(new String[0]);
     }
 
     /**
@@ -152,7 +152,7 @@ public class QueryManagerImpl implements QueryManager {
 
     private static Map<String, PropertyValue> convertMap(
             HashMap<String, Value> bindVariableMap) throws RepositoryException 
{
-        HashMap<String, PropertyValue> map = new HashMap<String, 
PropertyValue>();
+        HashMap<String, PropertyValue> map = new HashMap<>();
         for (Entry<String, Value> e : bindVariableMap.entrySet()) {
             map.put(e.getKey(),
                     PropertyValues.create(PropertyStates.createProperty("",
diff --git 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryResultImpl.java
 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryResultImpl.java
index 38638ac9ca..3d5de8380e 100644
--- 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryResultImpl.java
+++ 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/QueryResultImpl.java
@@ -69,7 +69,7 @@ public class QueryResultImpl implements QueryResult {
     }
 
     @Override
-    public String[] getColumnNames() throws RepositoryException {
+    public String[] getColumnNames() {
         return result.getColumnNames();
     }
 
@@ -80,7 +80,7 @@ public class QueryResultImpl implements QueryResult {
 
     @Override
     public RowIterator getRows() throws RepositoryException {
-        Iterator<RowImpl> rowIterator = new Iterator<RowImpl>() {
+        Iterator<RowImpl> rowIterator = new Iterator<>() {
 
             private final Iterator<? extends ResultRow> it = 
result.getRows().iterator();
             private final String pathSelector;
@@ -135,13 +135,15 @@ public class QueryResultImpl implements QueryResult {
             }
 
         };
-        final PrefetchIterator<RowImpl> prefIt = new  
PrefetchIterator<RowImpl>(
+        final PrefetchIterator<RowImpl> prefIt = new PrefetchIterator<>(
                 sessionDelegate.sync(rowIterator),
-                new PrefetchOptions() { {
-                    size = result.getSize();
-                    fastSize = sessionContext.getFastQueryResultSize();
-                    fastSizeCallback = result;
-                } });
+                new PrefetchOptions() {
+                    {
+                        size = result.getSize();
+                        fastSize = sessionContext.getFastQueryResultSize();
+                        fastSizeCallback = result;
+                    }
+                });
         return new RowIteratorAdapter(prefIt) {
             @Override
             public long getSize() {
@@ -171,62 +173,64 @@ public class QueryResultImpl implements QueryResult {
             throw new RepositoryException("Query does not contain a selector: 
" +
                     Arrays.toString(columnSelectorNames));
         }
-        Iterator<NodeImpl<? extends NodeDelegate>> nodeIterator = 
-                new Iterator<NodeImpl<? extends NodeDelegate>>() {
+        Iterator<NodeImpl<? extends NodeDelegate>> nodeIterator =
+                new Iterator<>() {
 
-            private final Iterator<? extends ResultRow> it = 
result.getRows().iterator();
-            private NodeImpl<? extends NodeDelegate> current;
+                    private final Iterator<? extends ResultRow> it = 
result.getRows().iterator();
+                    private NodeImpl<? extends NodeDelegate> current;
 
-            {
-                fetch();
-            }
+                    {
+                        fetch();
+                    }
 
-            private void fetch() {
-                current = null;
-                while (it.hasNext()) {
-                    ResultRow r = it.next();
-                    Tree tree = r.getTree(selectorName);
-                    if (tree != null && tree.exists()) {
-                        try {
-                            current = getNode(tree);
-                            break;
-                        } catch (RepositoryException e) {
-                            LOG.warn("Unable to fetch result node for path "
-                                     + tree.getPath(), e);
+                    private void fetch() {
+                        current = null;
+                        while (it.hasNext()) {
+                            ResultRow r = it.next();
+                            Tree tree = r.getTree(selectorName);
+                            if (tree != null && tree.exists()) {
+                                try {
+                                    current = getNode(tree);
+                                    break;
+                                } catch (RepositoryException e) {
+                                    LOG.warn("Unable to fetch result node for 
path "
+                                            + tree.getPath(), e);
+                                }
+                            }
                         }
                     }
-                }
-            }
 
-            @Override
-            public boolean hasNext() {
-                return current != null;
-            }
+                    @Override
+                    public boolean hasNext() {
+                        return current != null;
+                    }
 
-            @Override
-            public NodeImpl<? extends NodeDelegate> next() {
-                if (current == null) {
-                    throw new NoSuchElementException();
-                }
-                NodeImpl<? extends NodeDelegate> n = current;
-                fetch();
-                return n;
-            }
+                    @Override
+                    public NodeImpl<? extends NodeDelegate> next() {
+                        if (current == null) {
+                            throw new NoSuchElementException();
+                        }
+                        NodeImpl<? extends NodeDelegate> n = current;
+                        fetch();
+                        return n;
+                    }
 
-            @Override
-            public void remove() {
-                throw new UnsupportedOperationException();
-            }
+                    @Override
+                    public void remove() {
+                        throw new UnsupportedOperationException();
+                    }
 
-        };
-        final PrefetchIterator<NodeImpl<? extends NodeDelegate>> prefIt = 
-                new  PrefetchIterator<NodeImpl<? extends NodeDelegate>>(
-                    sessionDelegate.sync(nodeIterator),
-                    new PrefetchOptions() { {
-                        size = result.getSize();
-                        fastSize = sessionContext.getFastQueryResultSize();
-                        fastSizeCallback = result;
-                    } });
+                };
+        final PrefetchIterator<NodeImpl<? extends NodeDelegate>> prefIt =
+                new PrefetchIterator<>(
+                        sessionDelegate.sync(nodeIterator),
+                        new PrefetchOptions() {
+                            {
+                                size = result.getSize();
+                                fastSize = 
sessionContext.getFastQueryResultSize();
+                                fastSizeCallback = result;
+                            }
+                        });
         return new NodeIteratorAdapter(prefIt) {
             @Override
             public long getSize() {
diff --git 
a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/RowImpl.java 
b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/RowImpl.java
index 3eaf9ceaed..9114ccb860 100644
--- a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/RowImpl.java
+++ b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/query/RowImpl.java
@@ -77,13 +77,13 @@ public class RowImpl implements Row {
     }
 
     @Override
-    public double getScore() throws RepositoryException {
+    public double getScore() {
         // TODO row score
         return 0.01;
     }
 
     @Override
-    public double getScore(String selectorName) throws RepositoryException {
+    public double getScore(String selectorName) {
         // TODO row score
         return 0.01;
     }
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditor2Test.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditor2Test.java
index 405a7442b9..a3cd595a2e 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditor2Test.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditor2Test.java
@@ -19,13 +19,11 @@
 
 package org.apache.jackrabbit.oak.plugins.index.lucene;
 
-import java.io.IOException;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
-import org.apache.jackrabbit.oak.api.CommitFailedException;
 import org.apache.jackrabbit.oak.api.PropertyState;
 import org.apache.jackrabbit.oak.commons.PathUtils;
 import org.apache.jackrabbit.oak.plugins.index.IndexCommitCallback;
@@ -41,13 +39,10 @@ import 
org.apache.jackrabbit.oak.plugins.index.search.PropertyDefinition;
 import org.apache.jackrabbit.oak.plugins.index.search.PropertyUpdateCallback;
 import 
org.apache.jackrabbit.oak.plugins.index.search.spi.editor.FulltextIndexWriterFactory;
 import org.apache.jackrabbit.oak.spi.commit.CommitInfo;
-import org.apache.jackrabbit.oak.spi.commit.Editor;
 import org.apache.jackrabbit.oak.spi.commit.EditorHook;
 import org.apache.jackrabbit.oak.spi.state.NodeBuilder;
 import org.apache.jackrabbit.oak.spi.state.NodeState;
 import org.apache.lucene.index.IndexableField;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 import org.junit.Test;
 
 import static org.apache.jackrabbit.oak.InitialContentHelper.INITIAL_CONTENT;
@@ -62,15 +57,15 @@ import static org.mockito.Mockito.mock;
 
 public class LuceneIndexEditor2Test {
 
-    private NodeState root = INITIAL_CONTENT;
+    private final NodeState root = INITIAL_CONTENT;
     private NodeState before = root;
-    private IndexUpdateCallback updateCallback = 
mock(IndexUpdateCallback.class);
-    private ExtractedTextCache extractedTextCache = new ExtractedTextCache(0, 
0);
-    private TestIndexingContext indexingContext = new TestIndexingContext();
-    private TestWriterFactory writerFactory = new TestWriterFactory();
-    private TestPropertyUpdateCallback propCallback = new 
TestPropertyUpdateCallback();
-    private TestWriter writer = new TestWriter();
-    private String indexPath = "/oak:index/fooIndex";
+    private final IndexUpdateCallback updateCallback = 
mock(IndexUpdateCallback.class);
+    private final ExtractedTextCache extractedTextCache = new 
ExtractedTextCache(0, 0);
+    private final TestIndexingContext indexingContext = new 
TestIndexingContext();
+    private final TestWriterFactory writerFactory = new TestWriterFactory();
+    private final TestPropertyUpdateCallback propCallback = new 
TestPropertyUpdateCallback();
+    private final TestWriter writer = new TestWriter();
+    private final String indexPath = "/oak:index/fooIndex";
 
     @Test
     public void basics() throws Exception{
@@ -194,16 +189,11 @@ public class LuceneIndexEditor2Test {
     }
 
     private EditorHook createHook(LuceneIndexEditorContext context) {
-        IndexEditorProvider provider = new IndexEditorProvider() {
-            @Nullable
-            @Override
-            public Editor getIndexEditor(@NotNull String type, @NotNull 
NodeBuilder definition,
-                                         @NotNull NodeState root, @NotNull 
IndexUpdateCallback callback) {
-                if (TYPE_LUCENE.equals(type)) {
-                    return new LuceneIndexEditor(context);
-                }
-                return null;
+        IndexEditorProvider provider = (type, definition, root, callback) -> {
+            if (TYPE_LUCENE.equals(type)) {
+                return new LuceneIndexEditor(context);
             }
+            return null;
         };
 
         String async = context.isAsyncIndexing() ? "async" : null;
@@ -238,7 +228,7 @@ public class LuceneIndexEditor2Test {
         }
 
         @Override
-        public void done() throws CommitFailedException {
+        public void done() {
             doneInvocationCount++;
         }
 
@@ -295,17 +285,17 @@ public class LuceneIndexEditor2Test {
         boolean closed;
 
         @Override
-        public void updateDocument(String path, Iterable<? extends 
IndexableField> doc) throws IOException {
+        public void updateDocument(String path, Iterable<? extends 
IndexableField> doc) {
             docs.put(path, doc);
         }
 
         @Override
-        public void deleteDocuments(String path) throws IOException {
+        public void deleteDocuments(String path) {
             deletedPaths.add(path);
         }
 
         @Override
-        public boolean close(long timestamp) throws IOException {
+        public boolean close(long timestamp) {
             closed = true;
             return true;
         }
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorProviderTest.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorProviderTest.java
index f401b7cab4..35079d2706 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorProviderTest.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorProviderTest.java
@@ -19,7 +19,6 @@
 package org.apache.jackrabbit.oak.plugins.index.lucene;
 
 import org.apache.commons.lang3.reflect.FieldUtils;
-import org.apache.jackrabbit.oak.api.CommitFailedException;
 import org.apache.jackrabbit.oak.plugins.index.ContextAwareCallback;
 import org.apache.jackrabbit.oak.plugins.index.IndexCommitCallback;
 import org.apache.jackrabbit.oak.plugins.index.IndexUpdateCallback;
@@ -50,72 +49,75 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
 public class LuceneIndexEditorProviderTest {
-    private NodeState root = INITIAL_CONTENT;
-    private NodeBuilder builder = root.builder();
+    private final NodeState root = INITIAL_CONTENT;
+    private final NodeBuilder builder = root.builder();
 
     @Test
     public void readOnlyBuilderUsedForSync() throws Exception {
-        LuceneIndexEditorProvider editorProvider = new 
LuceneIndexEditorProvider(null,
+        try (LuceneIndexEditorProvider editorProvider = new 
LuceneIndexEditorProvider(null,
                 null,
                 null,
                 null,
-                Mounts.defaultMountInfoProvider());
-        editorProvider.setIndexingQueue(mock(DocumentQueue.class));
+                Mounts.defaultMountInfoProvider())) {
+            editorProvider.setIndexingQueue(mock(DocumentQueue.class));
 
-        IndexUpdateCallback callback = new TestCallback("/oak:index/fooIndex", 
newCommitInfo(), false, false);
-        NodeBuilder defnBuilder = createIndexDefinition("fooIndex").builder();
-        Editor editor = editorProvider.getIndexEditor(TYPE_LUCENE, 
defnBuilder, root, callback);
-        LuceneIndexEditor luceneEditor = (LuceneIndexEditor) editor;
+            IndexUpdateCallback callback = new 
TestCallback("/oak:index/fooIndex", newCommitInfo(), false, false);
+            NodeBuilder defnBuilder = 
createIndexDefinition("fooIndex").builder();
+            Editor editor = editorProvider.getIndexEditor(TYPE_LUCENE, 
defnBuilder, root, callback);
+            LuceneIndexEditor luceneEditor = (LuceneIndexEditor) editor;
 
-        NodeBuilder builderFromContext =
-                (NodeBuilder) FieldUtils.readField(luceneEditor.getContext(), 
"definitionBuilder", true);
+            NodeBuilder builderFromContext =
+                    (NodeBuilder) 
FieldUtils.readField(luceneEditor.getContext(), "definitionBuilder", true);
 
-        try {
-            builderFromContext.setProperty("foo", "bar");
-            fail("Should have been read only builder");
-        } catch (UnsupportedOperationException ignore) {
+            try {
+                builderFromContext.setProperty("foo", "bar");
+                fail("Should have been read only builder");
+            } catch (UnsupportedOperationException ignore) {
 
+            }
         }
     }
 
     @Test
     public void reuseOldIndexDefinition() throws Exception{
         IndexTracker tracker = mock(IndexTracker.class);
-        LuceneIndexEditorProvider editorProvider = new 
LuceneIndexEditorProvider(null,
+        try (LuceneIndexEditorProvider editorProvider = new 
LuceneIndexEditorProvider(null,
                 tracker,
                 null,
                 null,
-                Mounts.defaultMountInfoProvider());
-        editorProvider.setIndexingQueue(mock(DocumentQueue.class));
-        //Set up a different IndexDefinition which needs to be returned
-        //from tracker with a marker property
-        NodeBuilder testBuilder = createIndexDefinition("fooIndex").builder();
-        testBuilder.setProperty("foo", "bar");
-        LuceneIndexDefinition defn = new LuceneIndexDefinition(root, 
testBuilder.getNodeState(), "/foo");
-        
when(tracker.getIndexDefinition("/oak:index/fooIndex")).thenReturn(defn);
-
-        IndexUpdateCallback callback = new TestCallback("/oak:index/fooIndex", 
newCommitInfo(), false, false);
-        NodeBuilder defnBuilder = createIndexDefinition("fooIndex").builder();
-        Editor editor = editorProvider.getIndexEditor(TYPE_LUCENE, 
defnBuilder, root, callback);
-        LuceneIndexEditor luceneEditor = (LuceneIndexEditor) editor;
-        FulltextIndexEditorContext<Document> context = 
luceneEditor.getContext();
-
-        //Definition should reflect the marker property
-        assertEquals("bar", 
context.getDefinition().getDefinitionNodeState().getString("foo"));
+                Mounts.defaultMountInfoProvider())) {
+            editorProvider.setIndexingQueue(mock(DocumentQueue.class));
+            //Set up a different IndexDefinition which needs to be returned
+            //from tracker with a marker property
+            NodeBuilder testBuilder = 
createIndexDefinition("fooIndex").builder();
+            testBuilder.setProperty("foo", "bar");
+            LuceneIndexDefinition defn = new LuceneIndexDefinition(root, 
testBuilder.getNodeState(), "/foo");
+            
when(tracker.getIndexDefinition("/oak:index/fooIndex")).thenReturn(defn);
+
+            IndexUpdateCallback callback = new 
TestCallback("/oak:index/fooIndex", newCommitInfo(), false, false);
+            NodeBuilder defnBuilder = 
createIndexDefinition("fooIndex").builder();
+            Editor editor = editorProvider.getIndexEditor(TYPE_LUCENE, 
defnBuilder, root, callback);
+            LuceneIndexEditor luceneEditor = (LuceneIndexEditor) editor;
+            FulltextIndexEditorContext<Document> context = 
luceneEditor.getContext();
+
+            //Definition should reflect the marker property
+            assertEquals("bar", 
context.getDefinition().getDefinitionNodeState().getString("foo"));
+        }
     }
 
     @Test
     public void editorNullInCaseOfReindex() throws Exception{
-        LuceneIndexEditorProvider editorProvider = new 
LuceneIndexEditorProvider(null,
+        try (LuceneIndexEditorProvider editorProvider = new 
LuceneIndexEditorProvider(null,
                 null,
                 null,
                 null,
-                Mounts.defaultMountInfoProvider());
-        editorProvider.setIndexingQueue(mock(DocumentQueue.class));
-        IndexUpdateCallback callback = new TestCallback("/oak:index/fooIndex", 
newCommitInfo(), true, false);
-        NodeBuilder defnBuilder = createIndexDefinition("fooIndex").builder();
-        Editor editor = editorProvider.getIndexEditor(TYPE_LUCENE, 
defnBuilder, root, callback);
-        assertNull(editor);
+                Mounts.defaultMountInfoProvider())) {
+            editorProvider.setIndexingQueue(mock(DocumentQueue.class));
+            IndexUpdateCallback callback = new 
TestCallback("/oak:index/fooIndex", newCommitInfo(), true, false);
+            NodeBuilder defnBuilder = 
createIndexDefinition("fooIndex").builder();
+            Editor editor = editorProvider.getIndexEditor(TYPE_LUCENE, 
defnBuilder, root, callback);
+            assertNull(editor);
+        }
     }
 
     private NodeState createIndexDefinition(String idxName) {
@@ -128,9 +130,8 @@ public class LuceneIndexEditorProviderTest {
     }
 
     private CommitInfo newCommitInfo() {
-        CommitInfo info = new CommitInfo("admin", "s1",
+        return new CommitInfo("admin", "s1",
                 Map.of(CommitContext.NAME, new SimpleCommitContext()));
-        return info;
     }
 
     private static class TestCallback implements IndexUpdateCallback, 
IndexingContext, ContextAwareCallback {
@@ -172,7 +173,7 @@ public class LuceneIndexEditorProviderTest {
         }
 
         @Override
-        public void indexUpdate() throws CommitFailedException {
+        public void indexUpdate() {
 
         }
 
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorTest.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorTest.java
index 92ef77eff9..6558d43a20 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorTest.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorTest.java
@@ -100,11 +100,11 @@ import static org.junit.Assume.assumeFalse;
 public class LuceneIndexEditorTest {
     private EditorHook HOOK;
 
-    private NodeState root = INITIAL_CONTENT;
+    private final NodeState root = INITIAL_CONTENT;
 
     private NodeBuilder builder = root.builder();
 
-    private IndexTracker tracker = new IndexTracker();
+    private final IndexTracker tracker = new IndexTracker();
 
     private LuceneIndexNode indexNode;
 
@@ -602,7 +602,7 @@ public class LuceneIndexEditorTest {
         @Override
         public Editor getIndexEditor(@NotNull String type, @NotNull 
NodeBuilder definition,
                                      @NotNull NodeState root,
-                                     @NotNull IndexUpdateCallback callback) 
throws CommitFailedException {
+                                     @NotNull IndexUpdateCallback callback) {
             if (PropertyIndexEditorProvider.TYPE.equals(type)) {
                 return new FailOnDemandEditor();
             }
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexPlannerCommonTest.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexPlannerCommonTest.java
index a831c8aad1..839523d23f 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexPlannerCommonTest.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexPlannerCommonTest.java
@@ -586,7 +586,7 @@ public class LuceneIndexPlannerCommonTest extends 
IndexPlannerCommonTest {
         planner = new FulltextIndexPlanner(node, indexPath, filter, 
Collections.emptyList());
         plan = planner.getPlan();
 
-        //Because path transormation comes into play only when direct prop 
defs don't match
+        //Because path transformation comes into play only when direct prop 
defs don't match
         assertEquals(documentsPerValue(numOfDocs), 
plan.getEstimatedEntryCount());
 
         filter = createFilter("nt:base");
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexProviderServiceTest.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexProviderServiceTest.java
index 19e003476c..5997007be5 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexProviderServiceTest.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexProviderServiceTest.java
@@ -27,7 +27,6 @@ import java.util.concurrent.Callable;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.TimeUnit;
-import java.util.function.Predicate;
 
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.lang3.reflect.FieldUtils;
@@ -148,7 +147,7 @@ public class LuceneIndexProviderServiceTest {
         assertNotNull(context.getService(JournalPropertyService.class));
         assertNotNull(context.getService(IndexImporterProvider.class));
 
-        assertNotNull(WhiteboardUtils.getServices(wb, Runnable.class, 
(Predicate<Runnable>)r -> r instanceof PropertyIndexCleaner));
+        assertNotNull(WhiteboardUtils.getServices(wb, Runnable.class, r -> r 
instanceof PropertyIndexCleaner));
 
         MockOsgi.deactivate(service, context.bundleContext());
 
@@ -401,7 +400,7 @@ public class LuceneIndexProviderServiceTest {
         MockOsgi.activate(service, context.bundleContext(), config);
         ServiceReference[] sr = 
context.bundleContext().getAllServiceReferences(Runnable.class.getName(),
                 "(scheduler.name="+ PropertyIndexCleaner.class.getName()+")");
-        assertEquals(sr.length, 1);
+        assertEquals(1, sr.length);
 
         assertEquals(142L, sr[0].getProperty("scheduler.period"));
     }
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexQueryCommonTest.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexQueryCommonTest.java
index 273deb0db2..a2e5faff74 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexQueryCommonTest.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexQueryCommonTest.java
@@ -34,7 +34,7 @@ import java.util.concurrent.Executors;
  */
 public class LuceneIndexQueryCommonTest extends IndexQueryCommonTest {
 
-    private ExecutorService executorService = Executors.newFixedThreadPool(2);
+    private final ExecutorService executorService = 
Executors.newFixedThreadPool(2);
     @Rule
     public TemporaryFolder temporaryFolder = new TemporaryFolder(new 
File("target"));
 
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexTest.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexTest.java
index 18aea476ff..235f8ee278 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexTest.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexTest.java
@@ -127,7 +127,7 @@ public class LuceneIndexTest {
 
     private NodeBuilder builder = root.builder();
 
-    private Set<File> dirs = new HashSet<>();
+    private final Set<File> dirs = new HashSet<>();
 
     private IndexTracker tracker;
 
diff --git 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LucenePropertyIndexTest.java
 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LucenePropertyIndexTest.java
index 53dd4e788c..e4aba564a8 100644
--- 
a/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LucenePropertyIndexTest.java
+++ 
b/oak-lucene/src/test/java/org/apache/jackrabbit/oak/plugins/index/lucene/LucenePropertyIndexTest.java
@@ -155,7 +155,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
      */
     static final int NUMBER_OF_NODES = 
LucenePropertyIndex.LUCENE_QUERY_BATCH_SIZE * 2;
 
-    private ExecutorService executorService = Executors.newFixedThreadPool(2);
+    private final ExecutorService executorService = 
Executors.newFixedThreadPool(2);
 
     @Rule
     public TemporaryFolder temporaryFolder = new TemporaryFolder(new 
File("target"));
@@ -165,15 +165,13 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
 
     private LuceneIndexEditorProvider editorProvider;
 
-    private TestUtil.OptionalEditorProvider optionalEditorProvider = new 
TestUtil.OptionalEditorProvider();
+    private final TestUtil.OptionalEditorProvider optionalEditorProvider = new 
TestUtil.OptionalEditorProvider();
 
     private NodeStore nodeStore;
 
-    private LuceneIndexProvider provider;
-
     private ResultCountingIndexProvider queryIndexProvider;
 
-    private QueryEngineSettings queryEngineSettings = new 
QueryEngineSettings();
+    private final QueryEngineSettings queryEngineSettings = new 
QueryEngineSettings();
 
     @After
     public void after() {
@@ -190,7 +188,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
     protected ContentRepository createRepository() {
         IndexCopier copier = createIndexCopier();
         editorProvider = new LuceneIndexEditorProvider(copier, new 
ExtractedTextCache(10* FileUtils.ONE_MB, 100));
-        provider = new LuceneIndexProvider(copier);
+        LuceneIndexProvider provider = new LuceneIndexProvider(copier);
         queryIndexProvider = new ResultCountingIndexProvider(provider);
         nodeStore = new MemoryNodeStore(InitialContentHelper.INITIAL_CONTENT);
         return new Oak(nodeStore)
@@ -1451,8 +1449,8 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         n.setProperty("mytext", "the quick brown fox jumps over the lazy 
dog.");
         root.commit();
 
-        String sql = "SELECT * FROM [nt:base] WHERE [jcr:path] LIKE \'" + 
r.getPath() + "/%\'"
-            + " AND CONTAINS(*, \'text \'\'fox jumps\'\' -other\')";
+        String sql = "SELECT * FROM [nt:base] WHERE [jcr:path] LIKE '" + 
r.getPath() + "/%'"
+            + " AND CONTAINS(*, 'text ''fox jumps'' -other')";
         assertQuery(sql, List.of("/test/node1"));
     }
 
@@ -1462,7 +1460,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
                 NO_MAPPINGS).getRows());
 
         String measure = "";
-        if (result.size() > 0) {
+        if (!result.isEmpty()) {
             measure = result.get(0).toString();
         }
         return measure;
@@ -2111,11 +2109,9 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
 
         // execute the query again to assert the excerpts value of the first 
row
         Result result = executeQuery(query, SQL2, NO_BINDINGS);
-        Iterator<? extends ResultRow> rowsIt = result.getRows().iterator();
-        while (rowsIt.hasNext()) {
-            ResultRow row = rowsIt.next();
+        for (ResultRow row : result.getRows()) {
             PropertyValue excerptValue = row.getValue("rep:excerpt");
-            assertFalse("There is an excerpt expected for each result row for 
term 'foo'", excerptValue == null || "".equals(excerptValue.getValue(STRING)));
+            assertFalse("There is an excerpt expected for each result row for 
term 'foo'", excerptValue == null || excerptValue.getValue(STRING).isEmpty());
         }
     }
 
@@ -2138,11 +2134,11 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         assertTrue(resultRows.hasNext());
         ResultRow firstRow = result.getRows().iterator().next();
         PropertyValue excerptValue = firstRow.getValue("rep:excerpt");
-        assertTrue("There is an excerpt expected for rep:excerpt",excerptValue 
!= null && !"".equals(excerptValue.getValue(STRING)));
+        assertTrue("There is an excerpt expected for rep:excerpt",excerptValue 
!= null && !excerptValue.getValue(STRING).isEmpty());
         excerptValue = firstRow.getValue("rep:excerpt(.)");
-        assertTrue("There is an excerpt expected for 
rep:excerpt(.)",excerptValue != null && 
!"".equals(excerptValue.getValue(STRING)));
+        assertTrue("There is an excerpt expected for 
rep:excerpt(.)",excerptValue != null && 
!excerptValue.getValue(STRING).isEmpty());
         excerptValue = firstRow.getValue("rep:excerpt(bar)");
-        assertTrue("There is an excerpt expected for rep:excerpt(bar) 
",excerptValue != null && !"".equals(excerptValue.getValue(STRING)));
+        assertTrue("There is an excerpt expected for rep:excerpt(bar) 
",excerptValue != null && !excerptValue.getValue(STRING).isEmpty());
     }
 
     @Test
@@ -2863,7 +2859,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         long defSeed = 
idxState.getProperty(PROP_RANDOM_SEED).getValue(Type.LONG);
         long clonedSeed = 
idxState.getChildNode(INDEX_DEFINITION_NODE).getProperty(PROP_RANDOM_SEED).getValue(Type.LONG);
 
-        assertTrue("Injected def (" + defSeed + ")and clone (" + clonedSeed + 
" seeds aren't same", defSeed == clonedSeed);
+        assertEquals("Injected def (" + defSeed + ")and clone (" + clonedSeed 
+ " seeds aren't same", defSeed, clonedSeed);
     }
 
     @Test
@@ -2888,7 +2884,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         long clonedSeed = 
idxState.getChildNode(INDEX_DEFINITION_NODE).getProperty(PROP_RANDOM_SEED).getValue(Type.LONG);
 
         assertEquals("Random seed not updated", seed, defSeed);
-        assertTrue("Injected def (" + defSeed + ")and clone (" + clonedSeed + 
" seeds aren't same", defSeed == clonedSeed);
+        assertEquals("Injected def (" + defSeed + ")and clone (" + clonedSeed 
+ " seeds aren't same", defSeed, clonedSeed);
     }
 
     @Test
@@ -2912,7 +2908,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         long clonedSeed = 
idxState.getChildNode(INDEX_DEFINITION_NODE).getProperty(PROP_RANDOM_SEED).getValue(Type.LONG);
 
         assertEquals("Random seed not updated", seed, defSeed);
-        assertTrue("Injected def (" + defSeed + ")and clone (" + clonedSeed + 
" seeds aren't same", defSeed == clonedSeed);
+        assertEquals("Injected def (" + defSeed + ")and clone (" + clonedSeed 
+ " seeds aren't same", defSeed, clonedSeed);
     }
 
     @Test
@@ -2939,7 +2935,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
 
         assertNotEquals("Random seed not updated", orignalSeed, defSeed);
         assertNotEquals("Random seed updated to garbage", "garbage", defSeed);
-        assertTrue("Injected def (" + defSeed + ")and clone (" + clonedSeed + 
" seeds aren't same", defSeed == clonedSeed);
+        assertEquals("Injected def (" + defSeed + ")and clone (" + clonedSeed 
+ " seeds aren't same", defSeed, clonedSeed);
     }
 
     @Test
@@ -2960,7 +2956,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         long clonedSeed = 
idxState.getChildNode(INDEX_DEFINITION_NODE).getProperty(PROP_RANDOM_SEED).getValue(Type.LONG);
 
         assertEquals("Random seed udpated to garbage", -12312, defSeed);
-        assertTrue("Injected def (" + defSeed + ")and clone (" + clonedSeed + 
" seeds aren't same", defSeed == clonedSeed);
+        assertEquals("Injected def (" + defSeed + ")and clone (" + clonedSeed 
+ " seeds aren't same", defSeed, clonedSeed);
     }
 
     @Test
@@ -3172,7 +3168,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         return index.getChild(INDEX_DEFINITIONS_NAME).getChild(name);
     }
 
-    private Tree createFullTextIndex(Tree index, String name) throws 
CommitFailedException {
+    private Tree createFullTextIndex(Tree index, String name) {
         Tree def = index.addChild(INDEX_DEFINITIONS_NAME).addChild(name);
         def.setProperty(JcrConstants.JCR_PRIMARYTYPE, 
INDEX_DEFINITIONS_NODE_TYPE, Type.NAME);
         def.setProperty(TYPE_PROPERTY_NAME, LuceneIndexConstants.TYPE_LUCENE);
@@ -3199,7 +3195,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
 
     private static List<String> getSortedPaths(List<Tuple> tuples, 
OrderDirection dir) {
         if (OrderDirection.DESC == dir) {
-            Collections.sort(tuples, Collections.reverseOrder());
+            tuples.sort(Collections.reverseOrder());
         } else {
             Collections.sort(tuples);
         }
@@ -3361,7 +3357,7 @@ public class LucenePropertyIndexTest extends 
AbstractQueryTest {
         int accessCount = 0;
 
         @Override
-        public ExtractedText getText(String propertyPath, Blob blob) throws 
IOException {
+        public ExtractedText getText(String propertyPath, Blob blob) {
             ExtractedText result = idMap.get(blob.getContentIdentity());
             if (result != null){
                 accessCount++;
diff --git 
a/oak-search/src/main/java/org/apache/jackrabbit/oak/plugins/index/search/spi/query/FulltextIndex.java
 
b/oak-search/src/main/java/org/apache/jackrabbit/oak/plugins/index/search/spi/query/FulltextIndex.java
index d0c1f67d0a..f8beab7a3b 100644
--- 
a/oak-search/src/main/java/org/apache/jackrabbit/oak/plugins/index/search/spi/query/FulltextIndex.java
+++ 
b/oak-search/src/main/java/org/apache/jackrabbit/oak/plugins/index/search/spi/query/FulltextIndex.java
@@ -411,7 +411,7 @@ public abstract class FulltextIndex implements 
AdvancedQueryIndex, QueryIndex, N
                                   final IndexPlan plan, QueryLimits settings, 
SizeEstimator sizeEstimator) {
             pathPrefix = plan.getPathPrefix();
             this.sizeEstimator = sizeEstimator;
-            Iterator<String> pathIterator = new Iterator<String>() {
+            Iterator<String> pathIterator = new Iterator<>() {
 
                 private int readCount;
                 private int rewoundCount;
@@ -556,7 +556,7 @@ public abstract class FulltextIndex implements 
AdvancedQueryIndex, QueryIndex, N
             return pathRow.getValue(columnName);
         }
 
-    };
+    }
 
     public interface IteratorRewoundStateProvider {
         int rewoundCount();

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