/* $Id: AddWorkDelegate.java 19002 2010-03-16 01:28:07Z hardy.ferentschik $
*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009, Red Hat, Inc. and/or its affiliates or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat, Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
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.slf4j.Logger;
import org.hibernate.search.SearchException;
import org.hibernate.search.backend.AddLuceneWork;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.backend.Workspace;
import org.hibernate.search.batchindexing.MassIndexerProgressMonitor;
import org.hibernate.search.engine.DocumentBuilderIndexedEntity;
import org.hibernate.search.util.LoggerFactory;
import org.hibernate.search.util.ScopedAnalyzer;
/**
* 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 Logger log = LoggerFactory.make();
private final Workspace workspace;
AddWorkDelegate(Workspace workspace) {
this.workspace = workspace;
}
public void performWork(LuceneWork work, IndexWriter writer) {
final Class<?> entityType = work.getEntityClass();
@SuppressWarnings("unchecked")
DocumentBuilderIndexedEntity documentBuilder = workspace.getDocumentBuilder( entityType );
Map<String, String> fieldToAnalyzerMap = ( ( AddLuceneWork ) work ).getFieldToAnalyzerMap();
ScopedAnalyzer analyzer = ( ScopedAnalyzer ) documentBuilder.getAnalyzer();
analyzer = updateAnalyzerMappings( analyzer, fieldToAnalyzerMap );
if ( log.isTraceEnabled() ) {
log.trace(
"add to Lucene index: {}#{}:{}",
new Object[] { entityType, work.getId(), work.getDocument() }
);
}
try {
writer.addDocument( work.getDocument(), analyzer );
workspace.incrementModificationCounter( 1 );
}
catch ( IOException e ) {
throw new SearchException(
"Unable to add to Lucene index: "
+ entityType + "#" + work.getId(), e
);
}
}
/**
* Allows to override the otherwise static field to analyzer mapping in <code>scopedAnalyzer</code>.
*
* @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>.
*/
private ScopedAnalyzer updateAnalyzerMappings(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.warn( "Unable to retrieve named analyzer: " + entry.getValue() );
}
else {
analyzerClone.addScopedAnalyzer( entry.getKey(), analyzer );
}
}
return analyzerClone;
}
public void logWorkDone(LuceneWork work, MassIndexerProgressMonitor monitor) {
monitor.documentsAdded( 1 );
}
}