Package org.apache.drill.metastore.rdbms.transform

Class AbstractTransformer<T>

java.lang.Object

org.apache.drill.metastore.rdbms.transform.AbstractTransformer<T>

Type Parameters:

T - Metastore component metadata type

All Implemented Interfaces:

Transformer<T>

Direct Known Subclasses:

TablesTransformer

public abstract class AbstractTransformer<T>
extends Object
implements Transformer<T>

Abstract implementation of Transformer interface which contains common code for all Metastore component metadata types.

Constructor Summary

Constructors

Constructor	Description
AbstractTransformer()

Method Summary

Modifier and Type	Method	Description
List<RdbmsOperation.Delete>	toDelete(Delete delete)	Converts Metastore delete operation holder into list of RDBMS Metastore delete operations.
List<RdbmsOperation.Delete>	toDeleteAll()	Creates list of RDBMS Metastore delete operations which will delete all data from corresponding Metastore component tables.
protected RdbmsOperation.Overwrite	toOverwrite(String metadataTypeString, List<T> units)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.metastore.rdbms.transform.Transformer

toMapper, toMappers, toOverwrite

Constructor Details

AbstractTransformer

public AbstractTransformer()

Method Details

toDelete

public List<RdbmsOperation.Delete> toDelete(Delete delete)

Description copied from interface: Transformer

Converts Metastore delete operation holder into list of RDBMS Metastore delete operations.

Specified by:

toDelete in interface Transformer<T>

Parameters:

delete - Metastore delete operation holder

Returns:

list of RDBMS Metastore delete operations

toDeleteAll

public List<RdbmsOperation.Delete> toDeleteAll()

Description copied from interface: Transformer

Creates list of RDBMS Metastore delete operations which will delete all data from corresponding Metastore component tables.

Specified by:

toDeleteAll in interface Transformer<T>

Returns:

list of RDBMS Metastore delete operations

toOverwrite

protected RdbmsOperation.Overwrite toOverwrite(String metadataTypeString,
 List<T> units)