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LuceneLowLevelIndexReaderIT.java
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LuceneLowLevelIndexReaderIT.java
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/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.documentation.backend.lucene.lowlevel;
import static org.assertj.core.api.Assertions.assertThat;
import jakarta.persistence.EntityManagerFactory;
import org.hibernate.search.backend.lucene.LuceneExtension;
import org.hibernate.search.backend.lucene.scope.LuceneIndexScope;
import org.hibernate.search.documentation.backend.lucene.analyzer.Book;
import org.hibernate.search.documentation.testsupport.BackendConfigurations;
import org.hibernate.search.documentation.testsupport.DocumentationSetupHelper;
import org.hibernate.search.mapper.orm.Search;
import org.hibernate.search.mapper.orm.mapping.SearchMapping;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.apache.lucene.index.IndexReader;
public class LuceneLowLevelIndexReaderIT {
@Rule
public DocumentationSetupHelper setupHelper =
DocumentationSetupHelper.withSingleBackend( BackendConfigurations.simple() );
private EntityManagerFactory entityManagerFactory;
@Before
public void setup() {
entityManagerFactory = setupHelper.start().setup( Book.class );
}
@Test
public void indexReader() throws Exception {
int numDocs;
//tag::indexReader[]
SearchMapping mapping = /* ... */ // <1>
//end::indexReader[]
Search.mapping( entityManagerFactory );
//tag::indexReader[]
LuceneIndexScope indexScope = mapping
.scope( Book.class ).extension( LuceneExtension.get() ); // <2>
try ( IndexReader indexReader = indexScope.openIndexReader() ) { // <3>
// work with the low-level index reader:
numDocs = indexReader.numDocs();
}
//end::indexReader[]
assertThat( numDocs ).isZero();
}
}