org.elasticsearch.index.cache.id.IdReaderTypeCache Maven / Gradle / Ivy

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 * 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
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 */
package org.elasticsearch.index.cache.id;

import org.elasticsearch.common.bytes.HashedBytesArray;

/**
 *
 */
public interface IdReaderTypeCache {

    /**
     * @param docId The Lucene docId of the child document to return the parent _uid for.
     * @return The parent _uid for the specified docId (which is a child document)
     */
    HashedBytesArray parentIdByDoc(int docId);

    /**
     * @param uid The uid of the document to return the lucene docId for
     * @return The lucene docId for the specified uid
     */
    int docById(HashedBytesArray uid);

    /**
     * @param docId The lucene docId of the document to return _uid for
     * @return The _uid of the specified docId
     */
    HashedBytesArray idByDoc(int docId);

    /**
     * @return The size in bytes for this particular instance
     */
    long sizeInBytes();
}