/*
* 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.Serializable;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.hibernate.search.exception.AssertionFailure;
import org.hibernate.search.exception.SearchException;
import org.hibernate.search.backend.IndexingMonitor;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.bridge.util.impl.NumericFieldUtils;
import org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity;
import org.hibernate.search.store.Workspace;
import org.hibernate.search.util.logging.impl.LoggerFactory;
import org.hibernate.search.util.logging.impl.Log;
/**
* Extension of <code>DeleteLuceneWork</code> bound to a single entity.
* This allows to perform the delete LuceneWork in an optimal way in case
* the index is NOT shared across different entities (which is the default).
*
* @author Sanne Grinovero
* @see DeleteWorkDelegate
*/
public final class DeleteExtWorkDelegate extends DeleteWorkDelegate {
private final Class<?> managedType;
private final DocumentBuilderIndexedEntity builder;
private static final Log log = LoggerFactory.make();
private final boolean idIsNumeric;
DeleteExtWorkDelegate(Workspace workspace) {
super( workspace );
managedType = workspace.getEntitiesInIndexManager().iterator().next();
builder = workspace.getDocumentBuilder( managedType );
idIsNumeric = isIdNumeric( builder );
}
@Override
public void performWork(LuceneWork work, IndexWriter writer, IndexingMonitor monitor) {
checkType( work );
Serializable id = work.getId();
log.tracef( "Removing %s#%s by id using an IndexWriter.", managedType, id );
try {
if ( idIsNumeric ) {
writer.deleteDocuments( NumericFieldUtils.createExactMatchQuery( builder.getIdKeywordName(), id ) );
}
else {
Term idTerm = new Term( builder.getIdKeywordName(), work.getIdInString() );
writer.deleteDocuments( idTerm );
}
workspace.notifyWorkApplied( work );
}
catch (Exception e) {
String message = "Unable to remove " + managedType + "#" + id + " from index.";
throw new SearchException( message, e );
}
}
private void checkType(final LuceneWork work) {
if ( work.getEntityClass() != managedType ) {
throw new AssertionFailure( "Unexpected type" );
}
}
}