com.stratio.cassandra.lucene.search.condition.ContainsCondition.java Source code

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Here is the source code for com.stratio.cassandra.lucene.search.condition.ContainsCondition.java

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/*
 * Copyright 2014, Stratio.
 *
 * 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.Objects;
import com.stratio.cassandra.lucene.schema.Schema;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;

import java.util.Arrays;

/**
 * A {@link Condition} implementation that matches documents containing a value for a field.
 *
 * @author Andres de la Pena {@literal <adelapena@stratio.com>}
 */
public class ContainsCondition extends SingleFieldCondition {

    /** The name of the field to be matched. */
    public final String field;

    /** The value of the field to be matched. */
    public final Object[] values;

    /**
     * Constructor using the field name and the value to be matched.
     *
     * @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}. If {@code null}, then {@link
     *               #DEFAULT_BOOST} is used as default.
     * @param field  The name of the field to be matched.
     * @param values The value of the field to be matched.
     */
    public ContainsCondition(Float boost, String field, Object... values) {
        super(boost, field);

        if (values == null || values.length == 0) {
            throw new IllegalArgumentException("Field values required");
        }

        this.field = field;
        this.values = values;
    }

    /** {@inheritDoc} */
    @Override
    public Query query(Schema schema) {
        BooleanQuery query = new BooleanQuery();
        for (Object value : values) {
            Condition condition = new MatchCondition(boost, field, value);
            query.add(condition.query(schema), BooleanClause.Occur.SHOULD);
        }
        query.setBoost(boost);
        return query;
    }

    /** {@inheritDoc} */
    @Override
    public String toString() {
        return Objects.toStringHelper(this).add("boost", boost).add("field", field)
                .add("values", Arrays.toString(values)).toString();
    }
}