package org.bremersee.ldaptive.transcoder;
   
   import static java.util.Objects.isNull;
   
   import java.util.Objects;
   import org.ldaptive.dn.DefaultRDnNormalizer;
   import org.ldaptive.dn.Dn;
   import org.ldaptive.dn.RDnNormalizer;
   import org.ldaptive.transcode.AbstractStringValueTranscoder;
  
  /**
   * The distinguished name value transcoder.
   */
  public class DnValueTranscoder extends AbstractStringValueTranscoder<Dn> {
  
    private final RDnNormalizer rdnNormalizer;
  
    /**
     * Instantiates a new distinguished name value transcoder.
     */
    public DnValueTranscoder() {
      this(new DefaultRDnNormalizer());
    }
  
    /**
     * Instantiates a new distinguished name value transcoder.
     *
     * @param rdnNormalizer the rdn normalizer
     */
    public DnValueTranscoder(RDnNormalizer rdnNormalizer) {
      this.rdnNormalizer = Objects.requireNonNullElseGet(rdnNormalizer, DefaultRDnNormalizer::new);
    }
  
    @Override
    public Dn decodeStringValue(String dn) {
      if (isNull(dn) || dn.trim().isEmpty()) {
        return null;
      }
      return new Dn(dn.trim());
    }
  
    @Override
    public String encodeStringValue(Dn dn) {
      if (isNull(dn) || dn.isEmpty()) {
        return null;
      }
      return dn.format(rdnNormalizer);
    }
  
    @Override
    public Class<Dn> getType() {
      return Dn.class;
    }
  }