org.apache.asterix.metadata.entitytupletranslators

Class FeedTupleTranslator

java.lang.Object

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

org.apache.asterix.metadata.entitytupletranslators.FeedTupleTranslator

All Implemented Interfaces:

IMetadataEntityTupleTranslator<Feed>

public class FeedTupleTranslator
extends AbstractTupleTranslator<Feed>

Translates a Feed metadata entity to an ITupleReference and vice versa.

Field Summary

Fields

Modifier and Type	Field and Description
static int	FEED_DATAVERSE_NAME_FIELD_INDEX
static int	FEED_NAME_FIELD_INDEX
static int	FEED_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
FeedTupleTranslator(boolean getTuple)

Method Summary

Methods

Modifier and Type	Method and Description
Feed	getMetadataEntityFromTuple(org.apache.hyracks.dataflow.common.data.accessors.ITupleReference frameTuple) 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(Feed feed) Serializes the given metadata entity of type T into an appropriate tuple representation (i.e., some number of fields containing bytes).
void	writePropertyTypeRecord(String name, String value, DataOutput out)

Methods inherited from class java.lang.Object

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

Field Detail

FEED_DATAVERSE_NAME_FIELD_INDEX

public static final int FEED_DATAVERSE_NAME_FIELD_INDEX

See Also:

Constant Field Values

FEED_NAME_FIELD_INDEX

public static final int FEED_NAME_FIELD_INDEX

See Also:

Constant Field Values

FEED_PAYLOAD_TUPLE_FIELD_INDEX

public static final int FEED_PAYLOAD_TUPLE_FIELD_INDEX

See Also:

Constant Field Values

Constructor Detail

FeedTupleTranslator

public FeedTupleTranslator(boolean getTuple)

Method Detail

getMetadataEntityFromTuple

public Feed getMetadataEntityFromTuple(org.apache.hyracks.dataflow.common.data.accessors.ITupleReference frameTuple)
                                throws 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:

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

Returns:

A new instance of a metadata entity of type T.

Throws:

IOException

getTupleFromMetadataEntity

public org.apache.hyracks.dataflow.common.data.accessors.ITupleReference getTupleFromMetadataEntity(Feed feed)
                                                                                             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:

feed - Metadata entity to be written into a tuple.

Throws:

IOException

MetadataException

writePropertyTypeRecord

public void writePropertyTypeRecord(String name,
                           String value,
                           DataOutput out)
                             throws org.apache.hyracks.api.exceptions.HyracksDataException

Throws:

org.apache.hyracks.api.exceptions.HyracksDataException