HSEARCH-3589 Expose named analyzers and normalizers through LuceneBac…

…kend
hibernate · May 6, 2020 · 07bf865 · 07bf865
1 parent d8e143b
commit 07bf865
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Showing 3 changed files with 30 additions and 2 deletions.
diff --git a/backend/lucene/src/main/java/org/hibernate/search/backend/lucene/LuceneBackend.java b/backend/lucene/src/main/java/org/hibernate/search/backend/lucene/LuceneBackend.java
@@ -6,10 +6,26 @@
  */
 package org.hibernate.search.backend.lucene;
 
+import java.util.Optional;
+
 import org.hibernate.search.engine.backend.Backend;
+import org.hibernate.search.engine.backend.metamodel.IndexValueFieldTypeDescriptor;
+
+import org.apache.lucene.analysis.Analyzer;
 
 public interface LuceneBackend extends Backend {
 
-	// No Lucene-specific backend APIs yet
+	/**
+	 * @param name An analyzer name, e.g. a name returned by {@link IndexValueFieldTypeDescriptor#analyzerName()}
+	 * or {@link IndexValueFieldTypeDescriptor#searchAnalyzerName()}.
+	 * @return The corresponding analyzer, or {@link Optional#empty()} if it doesn't exist.
+	 */
+	Optional<? extends Analyzer> analyzer(String name);
+
+	/**
+	 * @param name A normalizer name, e.g. a name returned by {@link IndexValueFieldTypeDescriptor#normalizerName()}.
+	 * @return The corresponding normalizer, or {@link Optional#empty()} if it doesn't exist.
+	 */
+	Optional<? extends Analyzer> normalizer(String name);
 
 }
diff --git a/backend/lucene/src/main/java/org/hibernate/search/backend/lucene/impl/LuceneBackendImpl.java b/backend/lucene/src/main/java/org/hibernate/search/backend/lucene/impl/LuceneBackendImpl.java
@@ -7,6 +7,7 @@
 package org.hibernate.search.backend.lucene.impl;
 
 import java.lang.invoke.MethodHandles;
+import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 
 import org.hibernate.search.backend.lucene.analysis.model.impl.LuceneAnalysisDefinitionRegistry;
@@ -34,6 +35,7 @@
 import org.hibernate.search.util.common.impl.Closer;
 import org.hibernate.search.util.common.logging.impl.LoggerFactory;
 
+import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.search.similarities.Similarity;
 
 
@@ -134,6 +136,16 @@ public Backend toAPI() {
 		return this;
 	}
 
+	@Override
+	public Optional<Analyzer> analyzer(String name) {
+		return Optional.ofNullable( analysisDefinitionRegistry.getAnalyzerDefinition( name ) );
+	}
+
+	@Override
+	public Optional<Analyzer> normalizer(String name) {
+		return Optional.ofNullable( analysisDefinitionRegistry.getNormalizerDefinition( name ) );
+	}
+
 	@Override
 	public IndexManagerBuilder createIndexManagerBuilder(
 			String indexName, String mappedTypeName,

diff --git a/...nd/lucene/src/main/java/org/hibernate/search/backend/lucene/index/LuceneIndexManager.java b/...nd/lucene/src/main/java/org/hibernate/search/backend/lucene/index/LuceneIndexManager.java
@@ -10,6 +10,6 @@
 
 public interface LuceneIndexManager extends IndexManager {
 
-	// No Lucene-specific index manager APIs yet.
+	// No Lucene-specific backend APIs yet
 
 }