com.quantiply.samza.serde.JSONStringSerde.java Source code

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Here is the source code for com.quantiply.samza.serde.JSONStringSerde.java

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/*
 * Copyright 2014-2015 Quantiply Corporation. All rights reserved.
 *
 * 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 com.quantiply.samza.serde;

import org.apache.samza.config.Config;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.HashMap;
import java.io.StringWriter;

public class JSONStringSerde implements StringSerde {
    private final ObjectMapper _mapper;

    {
        _mapper = new ObjectMapper(new JsonFactory());
    }

    @Override
    public void init(Config cfg) throws Exception {
    }

    @Override
    public Object fromString(String msg) throws Exception {
        TypeReference<HashMap<String, Object>> typeRef = new TypeReference<HashMap<String, Object>>() {
        };

        return _mapper.readValue(msg, typeRef);
    }

    @Override
    public void writeTo(Object msg, StringWriter writer) throws Exception {
        _mapper.writeValue(writer, msg);
    }
}