org.hibernate.search.backend.impl.lucene.works.ByTermDeleteWorkDelegate.java Source code

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Here is the source code for org.hibernate.search.backend.impl.lucene.works.ByTermDeleteWorkDelegate.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.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.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> that will always perform the
 * delete LuceneWork in an optimal way, since the underlying data store guarantee
 * uniqueness of terms across different entity types.
 *
 * @author gustavonalle
 * @see DeleteWorkDelegate
 */
public final class ByTermDeleteWorkDelegate extends DeleteWorkDelegate {

    private static final Log log = LoggerFactory.make();

    ByTermDeleteWorkDelegate(Workspace workspace) {
        super(workspace);
    }

    @Override
    public void performWork(LuceneWork work, IndexWriter writer, IndexingMonitor monitor) {
        final Class<?> managedType = work.getEntityClass();
        DocumentBuilderIndexedEntity builder = workspace.getDocumentBuilder(managedType);
        Serializable id = work.getId();
        log.tracef("Removing %s#%s by id using an IndexWriter.", managedType, id);
        try {
            if (isIdNumeric(builder)) {
                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);
        }
    }

}