import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Base64;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;


/**
 * Created by salar on 10/3/16.
 */
public class Program {


    private static String Compress(String data) {
        try {

            // Create an output stream, and a gzip stream to wrap over.
            ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length());
            GZIPOutputStream gzip = new GZIPOutputStream(bos);

            // Compress the input string
            gzip.write(data.getBytes());
            gzip.close();
            byte[] compressed = bos.toByteArray();
            bos.close();

            // Convert to base64
            compressed = Base64.getEncoder().encode(compressed);

            // return the newly created string
            return new String(compressed);
        } catch(IOException e) {

            return null;
        }
    }



    private static String Decompress(String compressedText) throws IOException {

        // get the bytes for the compressed string
        byte[] compressed = compressedText.getBytes("UTF8");

        // convert the bytes from base64 to normal string
        Base64.Decoder d = Base64.getDecoder();
        compressed = d.decode(compressed);

        // decode.
        final int BUFFER_SIZE = 32;

        ByteArrayInputStream is = new ByteArrayInputStream(compressed);

        GZIPInputStream gis = new GZIPInputStream(is, BUFFER_SIZE);

        StringBuilder string = new StringBuilder();

        byte[] data = new byte[BUFFER_SIZE];

        int bytesRead;

        while ((bytesRead = gis.read(data)) != -1)
        {
            string.append(new String(data, 0, bytesRead));
        }
        gis.close();
        is.close();
        return string.toString();
    }




    public static void main(String args[]) {


        String input = "Mary had a little LAMB";


        String compressed = Compress(input);

        String uncompressed = null;
        try {
            uncompressed = Decompress(compressed);
        } catch (IOException e) {
            e.printStackTrace();
        }

        System.out.println("Original String: " + input);
        System.out.println("Compressed String: "+compressed);
        System.out.println("Uncompressed String: "+uncompressed);



    }
}