/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, 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.Serializable;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.hibernate.search.ProjectionConstants;
import org.hibernate.search.bridge.TwoWayFieldBridge;
import org.hibernate.search.bridge.builtin.NumericFieldBridge;
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.Log;
import org.hibernate.search.SearchException;
import org.hibernate.search.backend.IndexingMonitor;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.util.logging.impl.LoggerFactory;
/**
* Stateless implementation that performs a <code>DeleteLuceneWork</code>.
*
* @author Emmanuel Bernard
* @author Hardy Ferentschik
* @author John Griffin
* @author Sanne Grinovero
* @see LuceneWorkVisitor
* @see LuceneWorkDelegate
*/
class DeleteWorkDelegate implements LuceneWorkDelegate {
private static final Log log = LoggerFactory.make();
protected final Workspace workspace;
DeleteWorkDelegate(Workspace workspace) {
this.workspace = workspace;
}
@Override
public void performWork(LuceneWork work, IndexWriter writer, IndexingMonitor monitor) {
final Class<?> entityType = work.getEntityClass();
final Serializable id = work.getId();
log.tracef( "Removing %s#%s by query.", entityType, id );
DocumentBuilderIndexedEntity<?> builder = workspace.getDocumentBuilder( entityType );
BooleanQuery entityDeletionQuery = new BooleanQuery();
Query idQueryTerm;
if ( isIdNumeric( builder ) ) {
idQueryTerm = NumericFieldUtils.createExactMatchQuery( builder.getIdKeywordName(), id );
}
else {
Term idTerm = new Term( builder.getIdKeywordName(), work.getIdInString() );
idQueryTerm = new TermQuery( idTerm );
}
entityDeletionQuery.add( idQueryTerm, BooleanClause.Occur.MUST );
Term classNameQueryTerm = new Term( ProjectionConstants.OBJECT_CLASS, entityType.getName() );
TermQuery classNameQuery = new TermQuery( classNameQueryTerm );
entityDeletionQuery.add( classNameQuery, BooleanClause.Occur.MUST );
try {
writer.deleteDocuments( entityDeletionQuery );
}
catch (Exception e) {
String message = "Unable to remove " + entityType + "#" + id + " from index.";
throw new SearchException( message, e );
}
workspace.notifyWorkApplied( work );
}
protected static boolean isIdNumeric(DocumentBuilderIndexedEntity<?> documentBuilder) {
TwoWayFieldBridge idBridge = documentBuilder.getIdBridge();
return idBridge instanceof NumericFieldBridge;
}
}