AIR.Common.Json.JsonHelper.java Source code

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Here is the source code for AIR.Common.Json.JsonHelper.java

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/*******************************************************************************
 * Educational Online Test Delivery System Copyright (c) 2014 American
 * Institutes for Research
 * 
 * Distributed under the AIR Open Source License, Version 1.0 See accompanying
 * file AIR-License-1_0.txt or at http://www.smarterapp.org/documents/
 * American_Institutes_for_Research_Open_Source_Software_License.pdf
 ******************************************************************************/
package AIR.Common.Json;

import java.io.IOException;
import java.io.StringWriter;

import org.apache.commons.lang3.StringUtils;

import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonHelper {

    public static <T> String serialize(T obj) throws JsonGenerationException, JsonMappingException, IOException {
        if (obj == null)
            return null;

        ObjectMapper mapper = new ObjectMapper();

        String json = null;

        StringWriter sw = new StringWriter();
        mapper.writeValue(sw, obj);

        json = sw.toString();
        sw.close();

        return json;
    }

    public static <T> T deserialize(String json, Class<T> class1)
            throws JsonParseException, JsonMappingException, IOException {
        if (StringUtils.isEmpty(json))
            return null;

        ObjectMapper mapper = new ObjectMapper();

        return mapper.readValue(json, class1);

    }

    public static <T> T deserialize(String json, TypeReference<T> typeReference)
            throws JsonParseException, JsonMappingException, IOException {
        if (StringUtils.isEmpty(json))
            return null;

        ObjectMapper mapper = new ObjectMapper();

        return mapper.readValue(json, typeReference);
    }

}