package com.example.utils;

import java.io.IOException;

import com.fasterxml.aalto.stax.InputFactoryImpl;

import com.fasterxml.aalto.stax.OutputFactoryImpl;

import com.fasterxml.jackson.core.JsonParseException;

import com.fasterxml.jackson.core.JsonProcessingException;

import com.fasterxml.jackson.databind.JsonMappingException;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule;

import com.fasterxml.jackson.dataformat.xml.XmlFactory;

import com.fasterxml.jackson.dataformat.xml.XmlMapper;

public class SerializationHelper

{

    private static ObjectMapper objectMapper = new ObjectMapper();

    /**

     * Java Object to JSON String

     *

     * @param object

     * @return

     */

    public static String ObjectToJson(Object object)

    {

        String result = null;

        try

        {

            result = objectMapper.writeValueAsString(object);

        } catch (JsonProcessingException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return result;

    }

    /** JSON to Java Object

     *

     * @param jsonString

     * @param clazz

     * @return

     */

    public static <T> T JsonToObject(String jsonString, Class<T> clazz)

    {

        T result = null;

        try

        {

            result = objectMapper.readValue(jsonString, clazz);

        } catch (JsonParseException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (JsonMappingException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } 

        return result;

    }

    /**

     * Java Object to XML String

     *

     * @param object

     * @return

     */

    public static String ObjectToXml(Object object)

    {

        String result = null;

        XmlFactory factory = new XmlFactory(new InputFactoryImpl(), new OutputFactoryImpl());

        JacksonXmlModule module = new JacksonXmlModule();

        XmlMapper mapper = new XmlMapper(factory, module);

        try

        {

            result = mapper.writeValueAsString(object);

        } catch (JsonProcessingException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return result;

    }

    /** XML to Java Object

     *

     * @param xml

     * @param clazz

     * @return

     */

    public static <T> T XmlToObject(String xml, Class<T> clazz)

    {

        T result = null;

        XmlFactory factory = new XmlFactory(new InputFactoryImpl(), new OutputFactoryImpl());

        JacksonXmlModule module = new JacksonXmlModule();

        XmlMapper mapper = new XmlMapper(factory, module);

        try

        {

            result = mapper.readValue(xml, clazz);

        } catch (JsonParseException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (JsonMappingException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return result;

    }

}

@Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Student st = new Student();

        st.setName("stephen lee");

        st.setAge(123);

        st.setId(1);

        String jsonString = SerializationHelper.ObjectToJson(st);

        String xmlString = SerializationHelper.ObjectToXml(st);

        Toast.makeText(this, jsonString, Toast.LENGTH_SHORT).show();

        Toast.makeText(this, xmlString, Toast.LENGTH_SHORT).show();

        Student stFromJson = SerializationHelper.JsonToObject(jsonString, Student.class);

        Student stFromXml = SerializationHelper.XmlToObject(xmlString, Student.class);

        Toast.makeText(this, "stFromJson:" + stFromJson.getName(), Toast.LENGTH_SHORT).show();

        Toast.makeText(this, "stFromXml:" + stFromXml.getName(), Toast.LENGTH_SHORT).show();

    }