org.apache.asterix.metadata.valueextractors

Class MetadataEntityValueExtractor<T>

java.lang.Object

org.apache.asterix.metadata.valueextractors.MetadataEntityValueExtractor<T>

All Implemented Interfaces:

IValueExtractor<T>

public class MetadataEntityValueExtractor<T>
extends Object
implements IValueExtractor<T>

Extracts a metadata entity object from an ITupleReference.

Constructor Summary

Constructors

Constructor and Description
MetadataEntityValueExtractor(IMetadataEntityTupleTranslator<T> tupleReaderWriter)

Method Summary

Methods

Modifier and Type	Method and Description
T	getValue(JobId jobId, org.apache.hyracks.dataflow.common.data.accessors.ITupleReference tuple) Extracts an object of type T from a given tuple.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetadataEntityValueExtractor

public MetadataEntityValueExtractor(IMetadataEntityTupleTranslator<T> tupleReaderWriter)

Method Detail

getValue

public T getValue(JobId jobId,
         org.apache.hyracks.dataflow.common.data.accessors.ITupleReference tuple)
           throws MetadataException,
                  org.apache.hyracks.api.exceptions.HyracksDataException,
                  IOException

Description copied from interface: IValueExtractor

Extracts an object of type T from a given tuple.

Specified by:

getValue in interface IValueExtractor<T>

Parameters:

jobId - A globally unique transaction id.

tuple - Tuple from which an object shall be extracted.

Returns:

New object of type T.

Throws:

MetadataException

org.apache.hyracks.api.exceptions.HyracksDataException

IOException