/*
* 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.query.dsl.impl;
import org.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.FilteredQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.QueryWrapperFilter;
import org.hibernate.annotations.common.AssertionFailure;
import org.hibernate.search.query.dsl.QueryCustomization;
/**
* @author Emmanuel Bernard
*/
class QueryCustomizer implements QueryCustomization<QueryCustomizer> {
private float boost = 1f;
private boolean constantScore;
private Query wrappedQuery;
private Filter filter;
@Override
public QueryCustomizer boostedTo(float boost) {
this.boost = boost * this.boost;
return this;
}
@Override
public QueryCustomizer withConstantScore() {
constantScore = true;
return this;
}
@Override
public QueryCustomizer filteredBy(Filter filter) {
this.filter = filter;
return this;
}
public QueryCustomizer setWrappedQuery(Query wrappedQuery) {
this.wrappedQuery = wrappedQuery;
return this;
}
public Query createQuery() {
Query finalQuery = wrappedQuery;
if ( wrappedQuery == null ) {
throw new AssertionFailure( "wrapped query not set" );
}
finalQuery.setBoost( boost * finalQuery.getBoost() );
if ( filter != null ) {
finalQuery = new FilteredQuery(finalQuery, filter);
}
if ( constantScore ) {
finalQuery = new ConstantScoreQuery( new QueryWrapperFilter( finalQuery ) );
}
return finalQuery;
}
}