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/*
 * Copyright 2018 FZI Forschungszentrum Informatik
 *
 * Licensed 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.streampipes.wrapper.flink.converter;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.util.Collector;

import java.util.HashMap;
import java.util.Map;

public class JsonToMapFormat implements FlatMapFunction> {

  private static final long serialVersionUID = 1L;
  private ObjectMapper mapper;

  public JsonToMapFormat() {
    this.mapper = new ObjectMapper();
  }

  @SuppressWarnings("unchecked")
  @Override
  public void flatMap(String in, Collector> out)
          throws Exception {
    out.collect(mapper.readValue(in, HashMap.class));
  }

}