ilearnrw.prototype.application.JsonHandler.java Source code

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Here is the source code for ilearnrw.prototype.application.JsonHandler.java

Source

package ilearnrw.prototype.application;

/*
 * Copyright (c) 2015, iLearnRW. Licensed under Modified BSD Licence. See licence.txt for details.
 */
import ilearnrw.resource.ResourceLoader;
import ilearnrw.resource.ResourceLoader.Type;

import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.stream.JsonReader;

public class JsonHandler {
    private Gson gson;
    private String path;
    private Type type;

    public JsonHandler(Type type, String filename, boolean prettyPrint) {
        if (prettyPrint)
            gson = new GsonBuilder().setPrettyPrinting().create();
        else
            gson = new Gson();

        this.type = type;
        path = filename;
    }

    public boolean toJson(Object obj) {
        try {
            switch (type) {
            case DATA:
                path = "data/" + path;
                break;
            }
            FileWriter fw = new FileWriter(path);
            gson.toJson(obj, fw);
            fw.flush();
            fw.close();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    public Object fromJson(java.lang.reflect.Type type) {

        Object obj = null;
        try {
            InputStream inputStream = ResourceLoader.getInstance().getInputStream(this.type, path);
            JsonReader reader = new JsonReader(new InputStreamReader(inputStream, "UTF-8"));
            obj = gson.fromJson(reader, type);
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
            return obj;
        }

        return obj;
    }
}