org.streampipes.wrapper.kafka.converter.MapToJsonFormat Maven / Gradle / Ivy
/*
* 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.kafka.converter;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.kafka.streams.kstream.ValueMapper;
import java.util.Arrays;
import java.util.Collections;
import java.util.Map;
public class MapToJsonFormat implements ValueMapper, Iterable> {
private ObjectMapper objectMapper;
public MapToJsonFormat() {
this.objectMapper = new ObjectMapper();
}
@Override
public Iterable apply(Map stringObjectMap) {
try {
return Arrays.asList(objectMapper.writeValueAsString(stringObjectMap));
} catch (JsonProcessingException e) {
e.printStackTrace();
return Collections.emptyList();
}
}
}