Converter

Registering a Spring Converter

The ArangoConfiguration provides a convenient way to register Spring Converter by overriding the method customConverters().

Examples

@Configuration
public class MyConfiguration implements ArangoConfiguration {

  @Override
  protected Collection<Converter<?, ?>> customConverters() {
    Collection<Converter<?, ?>> converters = new ArrayList<>();
    converters.add(new MyConverter());
    return converters;
  }

}

Implementing a Spring Converter

A Converter is used for reading if the source type is of type VPackSlice or DBDocumentEntity.

A Converter is used for writing if the target type is of type VPackSlice, DBDocumentEntity, BigInteger, BigDecimal, java.sql.Date, java.sql.Timestamp, Instant, LocalDate, LocalDateTime, OffsetDateTime, ZonedDateTime, Boolean, Short, Integer, Byte, Float, Double, Character, String, Date, Class, Enum, boolean[], long[], short[], int[], byte[], float[], double[] or char[].

Examples

public class MyConverter implements Converter<MyObject, VPackSlice> {

  @Override
  public VPackSlice convert(final MyObject source) {
    VPackBuilder builder = new VPackBuilder();
    // map fields of MyObject to builder
    return builder.slice();
  }

}

For performance reasons VPackSlice should always be used within a converter. If your object is too complexe, you can also use DBDocumentEntity to simplify the mapping.