Can use @ScriptedFields annotated property as ctor parameter in records and Kotlin data classes.

Original Pull Request #1802 
Closes #1488

src/main/java/org/springframework/data/elasticsearch/core/document/DocumentAdapters.java

@@ -23,7 +23,6 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
-import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -63,36 +62,38 @@ import com.fasterxml.jackson.core.JsonGenerator;
  * @author Matt Gilene
  * @since 4.0
  */
-public class DocumentAdapters {
+public final class DocumentAdapters {
+
+	private DocumentAdapters() {}
 
 	/**
 	 * Create a {@link Document} from {@link GetResponse}.
 	 * <p>
-	 * Returns a {@link Document} using the source if available.
+	 * Returns a {@link Document} using the getResponse if available.
 	 *
-	 * @param source the source {@link GetResponse}.
-	 * @return the adapted {@link Document}, null if source.isExists() returns false.
+	 * @param getResponse the getResponse {@link GetResponse}.
+	 * @return the adapted {@link Document}, null if getResponse.isExists() returns false.
 	 */
 	@Nullable
-	public static Document from(GetResponse source) {
+	public static Document from(GetResponse getResponse) {
 
-		Assert.notNull(source, "GetResponse must not be null");
+		Assert.notNull(getResponse, "GetResponse must not be null");
 
-		if (!source.isExists()) {
+		if (!getResponse.isExists()) {
 			return null;
 		}
 
-		if (source.isSourceEmpty()) {
-			return fromDocumentFields(source, source.getIndex(), source.getId(), source.getVersion(), source.getSeqNo(),
-					source.getPrimaryTerm());
+		if (getResponse.isSourceEmpty()) {
+			return fromDocumentFields(getResponse, getResponse.getIndex(), getResponse.getId(), getResponse.getVersion(),
+					getResponse.getSeqNo(), getResponse.getPrimaryTerm());
 		}
 
-		Document document = Document.from(source.getSourceAsMap());
-		document.setIndex(source.getIndex());
-		document.setId(source.getId());
-		document.setVersion(source.getVersion());
-		document.setSeqNo(source.getSeqNo());
-		document.setPrimaryTerm(source.getPrimaryTerm());
+		Document document = Document.from(getResponse.getSourceAsMap());
+		document.setIndex(getResponse.getIndex());
+		document.setId(getResponse.getId());
+		document.setVersion(getResponse.getVersion());
+		document.setSeqNo(getResponse.getSeqNo());
+		document.setPrimaryTerm(getResponse.getPrimaryTerm());
 
 		return document;
 	}
@@ -188,9 +189,10 @@ public class DocumentAdapters {
 
 		if (sourceRef == null || sourceRef.length() == 0) {
 			return new SearchDocumentAdapter(
-					source.getScore(), source.getSortValues(), source.getFields(), highlightFields, fromDocumentFields(source,
-							source.getIndex(), source.getId(), source.getVersion(), source.getSeqNo(), source.getPrimaryTerm()),
-					innerHits, nestedMetaData, explanation, matchedQueries);
+					fromDocumentFields(source, source.getIndex(), source.getId(), source.getVersion(), source.getSeqNo(),
+							source.getPrimaryTerm()),
+					source.getScore(), source.getSortValues(), source.getFields(), highlightFields, innerHits, nestedMetaData,
+					explanation, matchedQueries);
 		}
 
 		Document document = Document.from(source.getSourceAsMap());
@@ -203,8 +205,8 @@ public class DocumentAdapters {
 		document.setSeqNo(source.getSeqNo());
 		document.setPrimaryTerm(source.getPrimaryTerm());
 
-		return new SearchDocumentAdapter(source.getScore(), source.getSortValues(), source.getFields(), highlightFields,
-				document, innerHits, nestedMetaData, explanation, matchedQueries);
+		return new SearchDocumentAdapter(document, source.getScore(), source.getSortValues(), source.getFields(),
+				highlightFields, innerHits, nestedMetaData, explanation, matchedQueries);
 	}
 
 	@Nullable
@@ -243,6 +245,10 @@ public class DocumentAdapters {
 	 *
 	 * @param documentFields the {@link DocumentField}s backing the {@link Document}.
 	 * @param index the index where the Document was found
+	 * @param id the document id
+	 * @param version the document version
+	 * @param seqNo the seqNo if the document
+	 * @param primaryTerm the primaryTerm of the document
 	 * @return the adapted {@link Document}.
 	 */
 	public static Document fromDocumentFields(Iterable<DocumentField> documentFields, String index, String id,
@@ -261,10 +267,13 @@ public class DocumentAdapters {
 		return new DocumentFieldAdapter(fields, index, id, version, seqNo, primaryTerm);
 	}
 
-	// TODO: Performance regarding keys/values/entry-set
+	/**
+	 * Adapter for a collection of {@link DocumentField}s.
+	 */
 	static class DocumentFieldAdapter implements Document {
 
 		private final Collection<DocumentField> documentFields;
+		private final Map<String, DocumentField> documentFieldMap;
 		private final String index;
 		private final String id;
 		private final long version;
@@ -274,6 +283,8 @@ public class DocumentAdapters {
 		DocumentFieldAdapter(Collection<DocumentField> documentFields, String index, String id, long version, long seqNo,
 				long primaryTerm) {
 			this.documentFields = documentFields;
+			this.documentFieldMap = new LinkedHashMap<>(documentFields.size());
+			documentFields.forEach(documentField -> documentFieldMap.put(documentField.getName(), documentField));
 			this.index = index;
 			this.id = id;
 			this.version = version;
@@ -353,14 +364,7 @@ public class DocumentAdapters {
 
 		@Override
 		public boolean containsKey(Object key) {
-
-			for (DocumentField documentField : documentFields) {
-				if (documentField.getName().equals(key)) {
-					return true;
-				}
-			}
-
-			return false;
+			return documentFieldMap.containsKey(key);
 		}
 
 		@Override
@@ -380,11 +384,9 @@ public class DocumentAdapters {
 		@Override
 		@Nullable
 		public Object get(Object key) {
-			return documentFields.stream() //
-					.filter(documentField -> documentField.getName().equals(key)) //
-					.map(DocumentField::getValue).findFirst() //
-					.orElse(null); //
 
+			DocumentField documentField = documentFieldMap.get(key);
+			return documentField != null ? documentField.getValue() : null;
 		}
 
 		@Override
@@ -409,17 +411,18 @@ public class DocumentAdapters {
 
 		@Override
 		public Set<String> keySet() {
-			return documentFields.stream().map(DocumentField::getName).collect(Collectors.toCollection(LinkedHashSet::new));
+			return documentFieldMap.keySet();
 		}
 
 		@Override
 		public Collection<Object> values() {
-			return documentFields.stream().map(DocumentFieldAdapter::getValue).collect(Collectors.toList());
+			return documentFieldMap.values().stream().map(DocumentFieldAdapter::getValue).collect(Collectors.toList());
 		}
 
 		@Override
 		public Set<Entry<String, Object>> entrySet() {
-			return documentFields.stream().collect(Collectors.toMap(DocumentField::getName, DocumentFieldAdapter::getValue))
+			return documentFieldMap.entrySet().stream()
+					.collect(Collectors.toMap(Entry::getKey, entry -> DocumentFieldAdapter.getValue(entry.getValue())))
 					.entrySet();
 		}
 
@@ -458,7 +461,6 @@ public class DocumentAdapters {
 			}
 		}
 
-
 		@Override
 		public String toString() {
 			return getClass().getSimpleName() + '@' + this.id + '#' + this.version + ' ' + toJson();
@@ -494,14 +496,14 @@ public class DocumentAdapters {
 		@Nullable private final Explanation explanation;
 		@Nullable private final List<String> matchedQueries;
 
-		SearchDocumentAdapter(float score, Object[] sortValues, Map<String, DocumentField> fields,
-				Map<String, List<String>> highlightFields, Document delegate, Map<String, SearchDocumentResponse> innerHits,
+		SearchDocumentAdapter(Document delegate, float score, Object[] sortValues, Map<String, DocumentField> fields,
+				Map<String, List<String>> highlightFields, Map<String, SearchDocumentResponse> innerHits,
 				@Nullable NestedMetaData nestedMetaData, @Nullable Explanation explanation,
 				@Nullable List<String> matchedQueries) {
 
+			this.delegate = delegate;
 			this.score = score;
 			this.sortValues = sortValues;
-			this.delegate = delegate;
 			fields.forEach((name, documentField) -> this.fields.put(name, documentField.getValues()));
 			this.highlightFields.putAll(highlightFields);
 			this.innerHits.putAll(innerHits);
@@ -646,7 +648,13 @@ public class DocumentAdapters {
 
 		@Override
 		public Object get(Object key) {
-			return delegate.get(key);
+
+			if (delegate.containsKey(key)) {
+				return delegate.get(key);
+			}
+
+			// fallback to fields
+			return fields.get(key);
 		}
 
 		@Override

src/main/java/org/springframework/data/elasticsearch/core/mapping/KebabCaseFieldNamingStrategy.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2019-2021 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.elasticsearch.core.mapping;
+
+import org.springframework.data.mapping.model.CamelCaseSplittingFieldNamingStrategy;
+
+/**
+ * @author Peter-Josef Meisch
+ * @since 4.3
+ */
+public class KebabCaseFieldNamingStrategy extends CamelCaseSplittingFieldNamingStrategy {
+	public KebabCaseFieldNamingStrategy() {
+		super("-");
+	}
+}

src/test/java/org/springframework/data/elasticsearch/core/ElasticsearchTemplateTests.java

@@ -19,6 +19,7 @@ import static java.util.Collections.*;
 import static org.assertj.core.api.Assertions.*;
 import static org.elasticsearch.index.query.QueryBuilders.*;
 import static org.springframework.data.elasticsearch.annotations.FieldType.*;
+import static org.springframework.data.elasticsearch.annotations.FieldType.Integer;
 import static org.springframework.data.elasticsearch.core.document.Document.*;
 import static org.springframework.data.elasticsearch.utils.IdGenerator.*;
 import static org.springframework.data.elasticsearch.utils.IndexBuilder.*;
@@ -3585,6 +3586,31 @@ public abstract class ElasticsearchTemplateTests {
 		assertThat(retrieved).isEqualTo(saved);
 	}
 
+	@Test // #1488
+	@DisplayName("should set scripted fields on immutable objects")
+	void shouldSetScriptedFieldsOnImmutableObjects() {
+
+		ImmutableWithScriptedEntity entity = new ImmutableWithScriptedEntity("42", 42, null);
+		operations.save(entity);
+
+		Map<String, Object> params = new HashMap<>();
+		params.put("factor", 2);
+		NativeSearchQuery searchQuery = new NativeSearchQueryBuilder().withQuery(matchAllQuery())
+				.withSourceFilter(new FetchSourceFilter(new String[] { "*" }, new String[] {}))
+				.withScriptField(
+				new ScriptField("scriptedRate", new Script(ScriptType.INLINE, "expression", "doc['rate'] * factor", params)))
+				.build();
+
+		SearchHits<ImmutableWithScriptedEntity> searchHits = operations.search(searchQuery,
+				ImmutableWithScriptedEntity.class);
+
+		assertThat(searchHits.getTotalHits()).isEqualTo(1);
+		ImmutableWithScriptedEntity foundEntity = searchHits.getSearchHit(0).getContent();
+		assertThat(foundEntity.getId()).isEqualTo("42");
+		assertThat(foundEntity.getRate()).isEqualTo(42);
+		assertThat(foundEntity.getScriptedRate()).isEqualTo(84.0);
+	}
+
 	// region entities
 	@Document(indexName = INDEX_NAME_SAMPLE_ENTITY)
 	@Setting(shards = 1, replicas = 0, refreshInterval = "-1")
@@ -4366,7 +4392,7 @@ public abstract class ElasticsearchTemplateTests {
 
 	@Document(indexName = "immutable-class")
 	private static final class ImmutableEntity {
-		@Id private final String id;
+		@Id @Nullable private final String id;
 		@Field(type = FieldType.Text) private final String text;
 		@Nullable private final SeqNoPrimaryTerm seqNoPrimaryTerm;
 
@@ -4376,6 +4402,7 @@ public abstract class ElasticsearchTemplateTests {
 			this.seqNoPrimaryTerm = seqNoPrimaryTerm;
 		}
 
+		@Nullable
 		public String getId() {
 			return id;
 		}
@@ -4419,5 +4446,61 @@ public abstract class ElasticsearchTemplateTests {
 					+ seqNoPrimaryTerm + '}';
 		}
 	}
+
+	@Document(indexName = "immutable-scripted")
+	public static final class ImmutableWithScriptedEntity {
+		@Id private final String id;
+		@Field(type = Integer) @Nullable private final int rate;
+		@Nullable @ScriptedField private final Double scriptedRate;
+
+		public ImmutableWithScriptedEntity(String id, int rate, @Nullable java.lang.Double scriptedRate) {
+			this.id = id;
+			this.rate = rate;
+			this.scriptedRate = scriptedRate;
+		}
+
+		public String getId() {
+			return id;
+		}
+
+		public int getRate() {
+			return rate;
+		}
+
+		@Nullable
+		public Double getScriptedRate() {
+			return scriptedRate;
+		}
+
+		@Override
+		public boolean equals(Object o) {
+			if (this == o)
+				return true;
+			if (o == null || getClass() != o.getClass())
+				return false;
+
+			ImmutableWithScriptedEntity that = (ImmutableWithScriptedEntity) o;
+
+			if (rate != that.rate)
+				return false;
+			if (!id.equals(that.id))
+				return false;
+			return scriptedRate != null ? scriptedRate.equals(that.scriptedRate) : that.scriptedRate == null;
+		}
+
+		@Override
+		public int hashCode() {
+			int result = id.hashCode();
+			result = 31 * result + rate;
+			result = 31 * result + (scriptedRate != null ? scriptedRate.hashCode() : 0);
+			return result;
+		}
+
+		@Override
+		public String toString() {
+			return "ImmutableWithScriptedEntity{" + "id='" + id + '\'' + ", rate=" + rate + ", scriptedRate=" + scriptedRate
+					+ '}';
+		}
+	}
 	// endregion
 }