ca.cmput301w14t09.elasticSearch.JsonBitmapConverter.java Source code

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Here is the source code for ca.cmput301w14t09.elasticSearch.JsonBitmapConverter.java

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/**
    
License GPLv3: GNU GPL Version 3
<http://gnu.org/licenses/gpl.html>.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package ca.cmput301w14t09.elasticSearch;

import java.io.ByteArrayOutputStream;
import java.lang.reflect.Type;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

/**
 * This code was borrowed from @zjullion to aid in being able to serialize bitmap pictures. 
 * Provides custom base64 serialization / deserialization for Bitmaps.
 * Algorithm taken from: http://stackoverflow.com/questions/9224056/android-bitmap-to-base64-string
 * @author zjullion, ssowemim
 */

/**
 * 
 * JsonBitmapConverter takes a bitmap and converts it into json
 *
 */

public class JsonBitmapConverter implements JsonDeserializer<Bitmap>, JsonSerializer<Bitmap> {

    public static void main(String[] args) {

    }

    /**
     * serialize turns a bitmap into a Json primivite type
     */

    @Override
    public JsonElement serialize(Bitmap src, Type typeOfSrc, JsonSerializationContext context) {

        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        src.compress(Bitmap.CompressFormat.JPEG, 80, stream);
        String base64Encoded = Base64.encodeToString(stream.toByteArray(), Base64.NO_WRAP);
        return new JsonPrimitive(base64Encoded);
    }

    /**
     * deserialize turns a Json primitive into a bitmap
     */

    @Override
    public Bitmap deserialize(JsonElement src, Type typeOfSrc, JsonDeserializationContext context)
            throws JsonParseException {

        String base64Encoded = src.getAsJsonPrimitive().getAsString();
        byte[] data = Base64.decode(base64Encoded, Base64.NO_WRAP);
        return BitmapFactory.decodeByteArray(data, 0, data.length);
    }

}