/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.
 */

package org.elasticsearch.index.cache;

import java.io.Closeable;
import java.io.IOException;

import org.apache.lucene.util.IOUtils;
import org.elassandra.index.search.TokenRangesBitsetFilterCache;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.index.AbstractIndexComponent;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.cache.bitset.BitsetFilterCache;
import org.elasticsearch.index.cache.query.QueryCache;
import org.elasticsearch.index.settings.IndexSettingsService;

/**
 *
 */
public class IndexCache extends AbstractIndexComponent implements Closeable {

    private final QueryCache queryCache;
    private final BitsetFilterCache bitsetFilterCache;
    private TokenRangesBitsetFilterCache tokenRangeBitsetFilterCache;

    @Inject
    public IndexCache(Index index, IndexSettingsService indexSettingsService, QueryCache queryCache, BitsetFilterCache bitsetFilterCache) {
        super(index, indexSettingsService.getSettings());
        this.queryCache = queryCache;
        this.bitsetFilterCache = bitsetFilterCache;
    }

    public QueryCache query() {
        return queryCache;
    }

    /**
     * Return the {@link BitsetFilterCache} for this index.
     */
    public BitsetFilterCache bitsetFilterCache() {
        return bitsetFilterCache;
    }
    
    public TokenRangesBitsetFilterCache tokenRangeBitsetFilterCache() {
        return tokenRangeBitsetFilterCache;
    }
    
    @Inject(optional=true)
    public void tokenRangeBitsetFilterCache(TokenRangesBitsetFilterCache tokenRangeBitsetFilterCache) {
        this.tokenRangeBitsetFilterCache = tokenRangeBitsetFilterCache;
    }

    @Override
    public void close() throws IOException {
        IOUtils.close(queryCache, bitsetFilterCache, tokenRangeBitsetFilterCache);
    }

    public void clear(String reason) {
        queryCache.clear(reason);
        bitsetFilterCache.clear(reason);
        if (tokenRangeBitsetFilterCache != null)
            tokenRangeBitsetFilterCache.clear(reason);
    }

}