DataStructureConverter (Flink : 2.0-SNAPSHOT API)

Type Parameters:

I - internal data structure (see RowData)

E - external data structure (see DataType.getConversionClass())

All Superinterfaces:

Serializable

All Known Implementing Classes:

ArrayBooleanArrayConverter, ArrayByteArrayConverter, ArrayDoubleArrayConverter, ArrayFloatArrayConverter, ArrayIntArrayConverter, ArrayListConverter, ArrayLongArrayConverter, ArrayObjectArrayConverter, ArrayShortArrayConverter, DateDateConverter, DateLocalDateConverter, DayTimeIntervalDurationConverter, DecimalBigDecimalConverter, IdentityConverter, LocalZonedTimestampInstantConverter, LocalZonedTimestampIntConverter, LocalZonedTimestampLongConverter, LocalZonedTimestampTimestampConverter, MapMapConverter, RawByteArrayConverter, RawObjectConverter, RowRowConverter, StringByteArrayConverter, StringStringConverter, StructuredObjectConverter, TimeLocalTimeConverter, TimeLongConverter, TimestampLocalDateTimeConverter, TimestampTimestampConverter, TimeTimeConverter, YearMonthIntervalPeriodConverter
```
@Internal
public interface DataStructureConverter<I,E>
extends Serializable
```
Converter between internal and external data structure.
Converters are serializable and can be passed to runtime operators. However, converters are not thread-safe.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default boolean`	`isIdentityConversion()`	Returns whether this conversion is a no-op.
`default void`	`open(ClassLoader classLoader)`
`E`	`toExternal(I internal)`	Converts to external data structure.
`default E`	`toExternalOrNull(I internal)`	Converts to external data structure or `null`.
`I`	`toInternal(E external)`	Converts to internal data structure.
`default I`	`toInternalOrNull(E external)`	Converts to internal data structure or `null`.

- Method Detail
  - open
```
default void open(ClassLoader classLoader)
```
  - toInternal
```
I toInternal(E external)
```
    Converts to internal data structure.
    Note: Parameter must not be null. Output must not be null.
  - toInternalOrNull
```
default I toInternalOrNull(E external)
```
    Converts to internal data structure or null.
    The nullability could be derived from the data type. However, this method reduces null checks.
  - toExternal
```
E toExternal(I internal)
```
    Converts to external data structure.
    Note: Parameter must not be null. Output must not be null.
  - toExternalOrNull
```
default E toExternalOrNull(I internal)
```
    Converts to external data structure or null.
    The nullability could be derived from the data type. However, this method reduces null checks.
  - isIdentityConversion
```
default boolean isIdentityConversion()
```
    Returns whether this conversion is a no-op.
    An identity conversion means that the type is already an internal data structure.