external/storm-cassandra/src/main/java/org/apache/storm/cassandra/trident/state/StateMapper.java

/**
 * 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.
 */

package org.apache.storm.cassandra.trident.state;

import java.io.Serializable;
import java.util.List;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Values;

public interface StateMapper<T> extends Serializable {

    Fields getStateFields();

    Values toValues(T value);

    T fromValues(List<Values> values);

}