GH-2619 - Correctly count most matching, static labels.

In case another matching node description is found, the value of the `mostMatchingStaticLabels` must be updated.

Fixes #2619.

# Conflicts:
#	src/test/java/org/springframework/data/neo4j/integration/reactive/ReactiveDynamicLabelsIT.java

# Conflicts:
#	src/main/java/org/springframework/data/neo4j/core/mapping/NodeDescriptionStore.java

Author: michael-simons

src/main/java/org/springframework/data/neo4j/core/mapping/NodeDescriptionStore.java

@@ -16,6 +16,7 @@
 package org.springframework.data.neo4j.core.mapping;
 
 import java.lang.reflect.Modifier;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -121,15 +122,12 @@ private NodeDescriptionAndLabels computeConcreteNodeDescription(NodeDescription<
 			Map<NodeDescription<?>, Integer> unmatchedLabelsCache = new HashMap<>();
 			List<String> mostMatchingStaticLabels = null;
 
-			// Remove is faster than "stream, filter, count".
-			BiFunction<NodeDescription<?>, List<String>,  Integer> unmatchedLabelsCount =
-					(nodeDescription, staticLabels) -> {
-						Set<String> staticLabelsClone = new HashSet<>(staticLabels);
-						labels.forEach(staticLabelsClone::remove);
-						return staticLabelsClone.size();
-					};
-
 			for (NodeDescription<?> nd : haystack) {
+
+				if (Modifier.isAbstract(nd.getUnderlyingClass().getModifiers())) {
+					continue;
+				}
+
 				List<String> staticLabels = nd.getStaticLabels();
 
 				if (staticLabels.containsAll(labels)) {
@@ -138,15 +136,20 @@ private NodeDescriptionAndLabels computeConcreteNodeDescription(NodeDescription<
 					return new NodeDescriptionAndLabels(nd, surplusLabels);
 				}
 
-				unmatchedLabelsCache.put(nd, unmatchedLabelsCount.apply(nd, staticLabels));
-				if (mostMatchingNodeDescription == null) {
-					mostMatchingNodeDescription = nd;
-					mostMatchingStaticLabels = staticLabels;
-					continue;
+				int unmatchedLabelsCount = 0;
+				List<String> matchingLabels = new ArrayList<>();
+				for (String staticLabel : staticLabels) {
+					if (labels.contains(staticLabel)) {
+						matchingLabels.add(staticLabel);
+					} else {
+						unmatchedLabelsCount++;
+					}
 				}
 
-				if (unmatchedLabelsCache.get(nd) < unmatchedLabelsCache.get(mostMatchingNodeDescription)) {
+				unmatchedLabelsCache.put(nd, unmatchedLabelsCount);
+				if (mostMatchingNodeDescription == null || unmatchedLabelsCount < unmatchedLabelsCache.get(mostMatchingNodeDescription)) {
 					mostMatchingNodeDescription = nd;
+					mostMatchingStaticLabels = matchingLabels;
 				}
 			}
 

src/test/java/org/springframework/data/neo4j/integration/reactive/ReactiveDynamicLabelsIT.java

@@ -19,12 +19,23 @@
 import static org.neo4j.cypherdsl.core.Conditions.not;
 import static org.neo4j.cypherdsl.core.Predicates.exists;
 
+import org.junit.jupiter.api.RepeatedTest;
+import org.springframework.data.neo4j.core.mapping.Neo4jMappingContext;
+import org.springframework.data.neo4j.integration.shared.common.CounterMetric;
+import org.springframework.data.neo4j.integration.shared.common.GaugeMetric;
+import org.springframework.data.neo4j.integration.shared.common.HistogramMetric;
+import org.springframework.data.neo4j.integration.shared.common.Metric;
+import org.springframework.data.neo4j.integration.shared.common.SummaryMetric;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
 
+import java.util.Arrays;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Predicate;
@@ -80,6 +91,38 @@ public class ReactiveDynamicLabelsIT {
 
 	protected static Neo4jExtension.Neo4jConnectionSupport neo4jConnectionSupport;
 
+
+	@Nested
+	class DynamicLabelsAndOrderOfClassesBeingLoaded extends SpringTestBase {
+
+		@Override
+		Long createTestEntity(Transaction t) {
+			return t.run("CREATE (m:Metric:Counter:A:B:C:D {timestamp: datetime()}) RETURN id(m)").single().get(0).asLong();
+
+		}
+
+		@RepeatedTest(100) // GH-2619
+		void ownLabelsShouldNotEndUpWithDynamicLabels(@Autowired Neo4jMappingContext mappingContext, @Autowired ReactiveNeo4jTemplate template) {
+
+			List<Class<? extends Metric>> metrics = Arrays.asList(GaugeMetric.class, SummaryMetric.class, HistogramMetric.class, CounterMetric.class);
+			Collections.shuffle(metrics);
+			for (Class<?> type : metrics) {
+				assertThat(mappingContext.getPersistentEntity(type)).isNotNull();
+			}
+
+			Map<String, Object> args = new HashMap<>();
+			args.put("agentIdLabel", "B");
+			template.findAll("MATCH (m:Metric) WHERE $agentIdLabel in labels(m) RETURN m ORDER BY m.timestamp DESC", args, Metric.class)
+					.as(StepVerifier::create)
+					.assertNext(cm -> {
+						assertThat(cm).isInstanceOf(CounterMetric.class);
+						assertThat(cm.getId()).isEqualTo(existingEntityId);
+						assertThat(cm.getDynamicLabels()).containsExactlyInAnyOrder("A", "B", "C", "D");
+					})
+					.verifyComplete();
+		}
+	}
+
 	@Nested
 	class EntityWithSingleStaticLabelAndGeneratedId extends SpringTestBase {
 

src/test/java/org/springframework/data/neo4j/integration/shared/common/CounterMetric.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2011-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.shared.common;
+
+import org.springframework.data.neo4j.core.schema.Node;
+
+/**
+ * @author Michael J. Simons
+ */
+@Node("Counter")
+public class CounterMetric extends Metric {
+
+	public CounterMetric(String name) {
+		super(name);
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/shared/common/GaugeMetric.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2011-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.shared.common;
+
+import org.springframework.data.neo4j.core.schema.Node;
+
+
+/**
+ * @author Michael J. Simons
+ */
+@Node("Gauge")
+public class GaugeMetric extends Metric {
+
+	public GaugeMetric(String name) {
+		super(name);
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/shared/common/HistogramMetric.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2011-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.shared.common;
+
+import org.springframework.data.neo4j.core.schema.Node;
+
+/**
+ * @author Michael J. Simons
+ */
+@Node("Histogram")
+public class HistogramMetric extends Metric {
+
+	public HistogramMetric(String name) {
+		super(name);
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/shared/common/Metric.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2011-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.shared.common;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.data.neo4j.core.schema.DynamicLabels;
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+
+/**
+ * @author Michael J. Simons
+ */
+@Node("Metric")
+public abstract class Metric {
+
+	@Id
+	@GeneratedValue
+	Long id;
+
+	@DynamicLabels
+	public List<String> dynamicLabels = new ArrayList<>();
+
+	public Long getId() {
+		return id;
+	}
+
+	public List<String> getDynamicLabels() {
+		return dynamicLabels;
+	}
+
+	private String name;
+
+	public Metric(String name) {
+		this.name = name;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/shared/common/SummaryMetric.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2011-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.shared.common;
+
+import org.springframework.data.neo4j.core.schema.Node;
+
+/**
+ * @author Michael J. Simons
+ */
+@Node("Summary")
+public class SummaryMetric extends Metric {
+
+	public SummaryMetric(String name) {
+		super(name);
+	}
+}