/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Lucene.Net.Search
{
    /**
     * A Filter that wrapped with an indication of how that filter
     * is used when composed with another filter.
     * (Follows the boolean logic in BooleanClause for composition 
     * of queries.)
     */
    [Serializable]
    public class FilterClause
    {
        Occur occur;
        Filter filter;

        /**
         * Create a new FilterClause
         * @param filter A Filter object containing a BitSet
         * @param occur A parameter implementation indicating SHOULD, MUST or MUST NOT
         */
        public FilterClause(Filter filter, Occur occur)
        {
            this.occur = occur;
            this.filter = filter;
        }

        /**
         * Returns this FilterClause's filter
         * @return A Filter object
         */
        public Filter GetFilter()
        {
            return filter;
        }

        /**
         * Returns this FilterClause's occur parameter
         * @return An Occur object
         */
        public Occur GetOccur()
        {
            return occur;
        }
    }
}