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package eu.mais_h.mathsync.serialize;

import java.io.UnsupportedEncodingException;

import eu.mais_h.mathsync.util.Function;

/**
 * Serializer going through a string representation of items.
 *
 * {@link StringDeserializer} should be used as the corresponding {@link Deserializer}.
 */
public class StringSerializer implements Serializer {

  private final Function toString;

  private StringSerializer(Function toString) {
    this.toString = toString;
  }

  @Override
  public byte[] serialize(T item) {
    String stringified = toString.apply(item);
    byte[] result;
    try {
      result = stringified.getBytes("UTF-8");
    } catch (UnsupportedEncodingException e) {
      throw new AssertionError("JVM does not support UTF-8 encoding");
    }
    return result;
  }

  /**
   * Retrieves an instance of this serializer.
   *
   * @param toString the function to convert items to string as an intermediate representation.
   * @return an instance of this serializer kind.
   */
  public static  Serializer create(Function toString) {
    return new StringSerializer<>(toString);
  }

  /**
   * Retrieves an instance of this serializer directly serializing strings.
   *
   * @return an instance of this serializer kind.
   */
  public static Serializer create() {
    return create(new Function() {

      @Override
      public String apply(String t) {
        return t;
      }
    });
  }
}