org.apache.asterix.metadata.entitytupletranslators

Class DatasourceAdapterTupleTranslator

java.lang.Object

org.apache.asterix.metadata.entitytupletranslators.AbstractTupleTranslator<DatasourceAdapter>

org.apache.asterix.metadata.entitytupletranslators.DatasourceAdapterTupleTranslator

All Implemented Interfaces:

IMetadataEntityTupleTranslator<DatasourceAdapter>

public class DatasourceAdapterTupleTranslator
extends AbstractTupleTranslator<DatasourceAdapter>

Field Summary

Fields

Modifier and Type	Field and Description
static int	ADAPTER_DATAVERSENAME_TUPLE_FIELD_INDEX
static int	ADAPTER_NAME_TUPLE_FIELD_INDEX
static int	ADAPTER_PAYLOAD_TUPLE_FIELD_INDEX

Fields inherited from class org.apache.asterix.metadata.entitytupletranslators.AbstractTupleTranslator

aString, booleanSerde, fieldValue, int32Serde, recordBuilder, stringSerde, tuple, tupleBuilder

Constructor Summary

Constructors

Constructor and Description
DatasourceAdapterTupleTranslator(boolean getTuple)

Method Summary

Methods

Modifier and Type	Method and Description
DatasourceAdapter	getMetadataEntityFromTuple(org.apache.hyracks.dataflow.common.data.accessors.ITupleReference tuple) Transforms a metadata entity of type T from a given tuple to a Java object (deserializing the appropriate field(s) in the tuple as necessary).
org.apache.hyracks.dataflow.common.data.accessors.ITupleReference	getTupleFromMetadataEntity(DatasourceAdapter adapter) Serializes the given metadata entity of type T into an appropriate tuple representation (i.e., some number of fields containing bytes).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ADAPTER_DATAVERSENAME_TUPLE_FIELD_INDEX

public static final int ADAPTER_DATAVERSENAME_TUPLE_FIELD_INDEX

See Also:

Constant Field Values

ADAPTER_NAME_TUPLE_FIELD_INDEX

public static final int ADAPTER_NAME_TUPLE_FIELD_INDEX

See Also:

Constant Field Values

ADAPTER_PAYLOAD_TUPLE_FIELD_INDEX

public static final int ADAPTER_PAYLOAD_TUPLE_FIELD_INDEX

See Also:

Constant Field Values

Constructor Detail

DatasourceAdapterTupleTranslator

public DatasourceAdapterTupleTranslator(boolean getTuple)

Method Detail

getMetadataEntityFromTuple

public DatasourceAdapter getMetadataEntityFromTuple(org.apache.hyracks.dataflow.common.data.accessors.ITupleReference tuple)
                                             throws MetadataException,
                                                    IOException

Description copied from interface: IMetadataEntityTupleTranslator

Transforms a metadata entity of type T from a given tuple to a Java object (deserializing the appropriate field(s) in the tuple as necessary).

Parameters:

tuple - Tuple containing a serialized representation of a metadata entity of type T.

Returns:

A new instance of a metadata entity of type T.

Throws:

MetadataException

IOException

getTupleFromMetadataEntity

public org.apache.hyracks.dataflow.common.data.accessors.ITupleReference getTupleFromMetadataEntity(DatasourceAdapter adapter)
                                                                                             throws IOException,
                                                                                                    MetadataException

Description copied from interface: IMetadataEntityTupleTranslator

Serializes the given metadata entity of type T into an appropriate tuple representation (i.e., some number of fields containing bytes).

Parameters:

adapter - Metadata entity to be written into a tuple.

Throws:

IOException

MetadataException