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/*
 * 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.flink.formats.protobuf.deserialize;

import org.apache.flink.formats.protobuf.PbCodegenException;

/**
 * PbCodegenDes is responsible for converting `messageGetStr` to flink internal row compatible
 * structure by codegen process. The codegen procedure could be considered as `returnVarName` =
 * codegen(`messageGetStr`)
 */
public interface PbCodegenDeserializer {
    /**
     * @param returnVarName the final var name that is calculated by codegen. This var name will be
     *     used by outsider codegen environment.
     * @param messageGetStr may be a variable or expression. Current codegen environment can use
     *     this literal name directly to access the input.
     * @return
     */
    String codegen(String returnVarName, String messageGetStr) throws PbCodegenException;
}




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