/*
* 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.backend.impl.lucene.works;
import java.io.IOException;
import java.util.Map;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.index.IndexWriter;
import org.hibernate.search.exception.SearchException;
import org.hibernate.search.backend.IndexingMonitor;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity;
import org.hibernate.search.store.Workspace;
import org.hibernate.search.util.impl.ScopedAnalyzer;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;
/**
* Stateless implementation that performs an <code>AddLuceneWork</code>.
*
* @author Emmanuel Bernard
* @author Hardy Ferentschik
* @author John Griffin
* @author Sanne Grinovero
* @see LuceneWorkVisitor
* @see LuceneWorkDelegate
*/
class AddWorkDelegate implements LuceneWorkDelegate {
private static final Log log = LoggerFactory.make();
protected final Workspace workspace;
AddWorkDelegate(Workspace workspace) {
this.workspace = workspace;
}
@Override
public void performWork(LuceneWork work, IndexWriter writer, IndexingMonitor monitor) {
final Class<?> entityType = work.getEntityClass();
DocumentBuilderIndexedEntity documentBuilder = workspace.getDocumentBuilder( entityType );
Map<String, String> fieldToAnalyzerMap = work.getFieldToAnalyzerMap();
ScopedAnalyzer analyzer = documentBuilder.getAnalyzer();
analyzer = updateAnalyzerMappings( workspace, analyzer, fieldToAnalyzerMap );
if ( log.isTraceEnabled() ) {
log.trace( "add to Lucene index: " + entityType + "#" + work.getId() + ":" + work.getDocument() );
}
try {
writer.addDocument( work.getDocument(), analyzer );
workspace.notifyWorkApplied( work );
}
catch (IOException e) {
throw new SearchException(
"Unable to add to Lucene index: "
+ entityType + "#" + work.getId(), e
);
}
if ( monitor != null ) {
monitor.documentsAdded( 1l );
}
}
/**
* Allows to override the otherwise static field to analyzer mapping in <code>scopedAnalyzer</code>.
*
* @param workspace The current work context
* @param scopedAnalyzer The scoped analyzer created at startup time.
* @param fieldToAnalyzerMap A map of <code>Document</code> field names for analyzer names. This map gets creates
* when the Lucene <code>Document</code> gets created and uses the state of the entity to index to determine analyzers
* dynamically at index time.
*
* @return <code>scopedAnalyzer</code> in case <code>fieldToAnalyzerMap</code> is <code>null</code> or empty. Otherwise
* a clone of <code>scopedAnalyzer</code> is created where the analyzers get overriden according to <code>fieldToAnalyzerMap</code>.
*/
static ScopedAnalyzer updateAnalyzerMappings(Workspace workspace, ScopedAnalyzer scopedAnalyzer, Map<String, String> fieldToAnalyzerMap) {
// for backwards compatibility
if ( fieldToAnalyzerMap == null || fieldToAnalyzerMap.isEmpty() ) {
return scopedAnalyzer;
}
ScopedAnalyzer analyzerClone = scopedAnalyzer.clone();
for ( Map.Entry<String, String> entry : fieldToAnalyzerMap.entrySet() ) {
Analyzer analyzer = workspace.getAnalyzer( entry.getValue() );
if ( analyzer == null ) {
log.unableToRetrieveNamedAnalyzer( entry.getValue() );
}
else {
analyzerClone.addScopedAnalyzer( entry.getKey(), analyzer );
}
}
return analyzerClone;
}
}