org.apache.asterix.metadata.valueextractors

Class NestedDatatypeNameValueExtractor

java.lang.Object

org.apache.asterix.metadata.valueextractors.NestedDatatypeNameValueExtractor

All Implemented Interfaces:

IValueExtractor<String>

public class NestedDatatypeNameValueExtractor
extends Object
implements IValueExtractor<String>

Extracts the value of field 'DataypeName' of the first nested type from an ITupleReference that contains a serialized representation of a Datatype metadata entity.

Constructor Summary

Constructors

Constructor and Description
NestedDatatypeNameValueExtractor(String datatypeName)

Method Summary

Methods

Modifier and Type	Method and Description
String	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

NestedDatatypeNameValueExtractor

public NestedDatatypeNameValueExtractor(String datatypeName)

Method Detail

getValue

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

Description copied from interface: IValueExtractor

Extracts an object of type T from a given tuple.

Specified by:

getValue in interface IValueExtractor<String>

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