/*
 * 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.docset.none;

import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.util.FixedBitSet;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.docset.ContextDocIdSet;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.AbstractIndexComponent;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.cache.docset.DocSetCache;
import org.elasticsearch.index.settings.IndexSettings;

/**
 */
public class NoneDocSetCache extends AbstractIndexComponent implements DocSetCache {

    @Inject
    public NoneDocSetCache(Index index, @IndexSettings Settings indexSettings) {
        super(index, indexSettings);
    }

    @Override
    public void clear(String reason) {
    }

    @Override
    public void clear(IndexReader reader) {
    }

    @Override
    public ContextDocIdSet obtain(AtomicReaderContext context) {
        return new ContextDocIdSet(context, new FixedBitSet(context.reader().maxDoc()));
    }

    @Override
    public void release(ContextDocIdSet docSet) {
    }
}
