com.stratio.cassandra.lucene.search.condition.NoneCondition Maven / Gradle / Ivy
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/*
* Copyright (C) 2014 Stratio (http://stratio.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.stratio.cassandra.lucene.search.condition;
import com.google.common.base.MoreObjects;
import com.stratio.cassandra.lucene.schema.Schema;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import java.util.Collections;
import java.util.Set;
/**
* A {@link Condition} implementation that matches none documents.
*
* @author Andres de la Pena {@literal }
*/
public class NoneCondition extends Condition {
/**
* Constructor without field arguments.
*
* @param boost The boost for this query clause. Documents matching this clause will (in addition to the normal
* weightings) have their score multiplied by {@code boost}.
*/
public NoneCondition(Float boost) {
super(boost);
}
/** {@inheritDoc} */
@Override
public Query doQuery(Schema schema) {
return new BooleanQuery.Builder().build();
}
/** {@inheritDoc} */
public Set postProcessingFields() {
return Collections.emptySet();
}
/** {@inheritDoc} */
@Override
public MoreObjects.ToStringHelper toStringHelper() {
return toStringHelper(this);
}
}