com.claresco.tinman.json.XapiResultJson.java Source code

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Here is the source code for com.claresco.tinman.json.XapiResultJson.java

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/**
 * ClarescoExperienceAPI
 * Copyright 
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * Please contact Claresco, www.claresco.com, if you have any questions.
 **/

package com.claresco.tinman.json;

import java.io.BufferedReader;
import java.io.FileReader;
import java.lang.reflect.Type;

import org.joda.time.Duration;
import org.joda.time.Period;

import com.claresco.tinman.lrs.XapiExtension;
import com.claresco.tinman.lrs.XapiResult;
import com.claresco.tinman.lrs.XapiScore;
import com.google.gson.Gson;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

/**
 * XapiResultJson.java
 *
 * Responsible from deserializing and serializing to and for XapiResult respectively
 *
 *
 *
 * @author rheza
 * on Mar 5, 2014
 * 
 */

public class XapiResultJson implements JsonSerializer<XapiResult>, JsonDeserializer<XapiResult> {

    /* (non-Javadoc)
     * @see com.google.gson.JsonSerializer#serialize(java.lang.Object, java.lang.reflect.Type, com.google.gson.JsonSerializationContext)
     */
    @Override
    public JsonElement serialize(XapiResult arg0, Type arg1, JsonSerializationContext arg2) {

        JsonObject result = new JsonObject();

        if (arg0.hasScore()) {
            result.add("score", arg2.serialize(arg0.getScore(), XapiScore.class));
        }

        if (arg0.hasSuccess()) {
            result.addProperty("success", arg0.getSuccess());
        }

        if (arg0.hasCompletion()) {
            result.addProperty("completion", arg0.getCompletion());
        }

        if (arg0.hasResponse()) {
            result.addProperty("response", arg0.getResponse());
        }

        if (arg0.hasDuration()) {
            result.addProperty("duration", arg0.getDuration().toString());
        }

        if (arg0.hasExtension()) {
            result.add("extensions", arg2.serialize(arg0.getExtension(), XapiExtension.class));
        }

        return result;
    }

    /* (non-Javadoc)
     * @see com.google.gson.JsonDeserializer#deserialize(com.google.gson.JsonElement, java.lang.reflect.Type, com.google.gson.JsonDeserializationContext)
     */
    @Override
    public XapiResult deserialize(JsonElement arg0, Type arg1, JsonDeserializationContext arg2)
            throws JsonParseException {
        JsonObject theResult = JsonUtility.convertJsonElementToJsonObject(arg0);

        XapiScore theScore = JsonUtility.delegateDeserialization(arg2,
                JsonUtility.findJsonElementWithKey(theResult, "score"), XapiScore.class);
        Boolean theSuccess = JsonUtility.getElementAsBool(theResult, "success");
        Boolean theCompletion = JsonUtility.getElementAsBool(theResult, "completion");
        String theResponse = JsonUtility.getElementAsString(theResult, "response");
        String theStringDuration = JsonUtility.getElementAsString(theResult, "duration");

        Period thePeriodDuration = null;
        Duration theDuration = null;
        try {
            if (theStringDuration != null) {
                thePeriodDuration = Period.parse(theStringDuration);
                theDuration = thePeriodDuration.toStandardDuration();
            }
        } catch (IllegalArgumentException e) {
            throw new XapiBadResultException("Invalid Duration");
        }

        XapiExtension theExtension = null;
        if (JsonUtility.hasElement(theResult, "extensions")) {
            theExtension = JsonUtility.delegateDeserialization(arg2, JsonUtility.get(theResult, "extensions"),
                    XapiExtension.class);
        }

        XapiResult theResultObject = new XapiResult(theScore, theSuccess, theCompletion, theResponse, theDuration,
                theExtension);

        if (theResultObject.isEmpty()) {
            return null;
        }

        return theResultObject;
    }

    public static void main(String[] args) {
        Gson gson = JsonUtility.createGson();

        String path = "/Users/rheza/Documents/workspace/ClarescoExperienceAPI/src/com/claresco/tinman/json/Result.json";

        try {
            BufferedReader bf = new BufferedReader(new FileReader(path));
            XapiResult r = gson.fromJson(bf, XapiResult.class);

            System.out.println(r);

            String json = gson.toJson(r);
            System.out.println(json);

        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}