Package com.exasol.adapter.jdbc

Class AbstractRemoteMetadataReader

java.lang.Object

com.exasol.adapter.jdbc.AbstractMetadataReader

com.exasol.adapter.jdbc.AbstractRemoteMetadataReader

All Implemented Interfaces:

MetadataReader, RemoteMetadataReader

Direct Known Subclasses:

BaseRemoteMetadataReader

public abstract class AbstractRemoteMetadataReader
extends AbstractMetadataReader
implements RemoteMetadataReader

Contains a common part of remote metadata readers.

Field Summary

Fields

Modifier and Type	Field	Description
protected ColumnMetadataReader	columnMetadataReader	Column metadata reader
protected IdentifierConverter	identifierConverter	Identifier converter
protected TableMetadataReader	tableMetadataReader	Table metadata reader

Fields inherited from class com.exasol.adapter.jdbc.AbstractMetadataReader

connection, exaMetadata, properties

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractRemoteMetadataReader(Connection connection, com.exasol.adapter.AdapterProperties properties, com.exasol.ExaMetadata exaMetadata)	Create a new instance of AbstractRemoteMetadataReader.

Method Summary

Modifier and Type	Method	Description
protected abstract ColumnMetadataReader	createColumnMetadataReader()	Create a reader that handles column metadata.
protected abstract IdentifierConverter	createIdentifierConverter()	Create a converter that translates identifiers from the remote data source to the Exasol representation.
protected abstract TableMetadataReader	createTableMetadataReader()	Create a reader that handles table metadata.
ColumnMetadataReader	getColumnMetadataReader()	Get the remote column metadata reader.
IdentifierConverter	getIdentifierConverter()	Get the identifier converter.
SchemaAdapterNotes	getSchemaAdapterNotes()	Create the schema adapter notes from database metadata.
Set<String>	getSupportedTableTypes()	Get the table types the remote metadata reader supports.
TableMetadataReader	getTableMetadataReader()	Get the table metadata reader.
protected String[]	getTableTypeFilter()	Get the table type filter.
protected void	logTablesScan(String catalogName, String schemaName)	Log the tables scanning.
com.exasol.adapter.metadata.SchemaMetadata	readRemoteSchemaMetadata()	Read schema metadata from the remote data source.
com.exasol.adapter.metadata.SchemaMetadata	readRemoteSchemaMetadata(List<String> selectedTables)	Read schema metadata for a selection of tables from the remote data source.

Methods inherited from class com.exasol.adapter.jdbc.AbstractMetadataReader

getCatalogNameFilter, getSchemaNameFilter

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.exasol.adapter.jdbc.MetadataReader

getCatalogNameFilter, getSchemaNameFilter

Field Detail

columnMetadataReader

protected final ColumnMetadataReader columnMetadataReader

Column metadata reader

tableMetadataReader

protected final TableMetadataReader tableMetadataReader

Table metadata reader

identifierConverter

protected final IdentifierConverter identifierConverter

Identifier converter

Constructor Detail

AbstractRemoteMetadataReader

protected AbstractRemoteMetadataReader(Connection connection,
                                       com.exasol.adapter.AdapterProperties properties,
                                       com.exasol.ExaMetadata exaMetadata)

Create a new instance of AbstractRemoteMetadataReader.

Parameters:

connection - SQl connection

properties - adapter properties

exaMetadata - metadata of the Exasol database

Method Detail

createColumnMetadataReader

protected abstract ColumnMetadataReader createColumnMetadataReader()

Create a reader that handles column metadata.

Override this method in cases where a remote data source needs specific handling of column metadata

Returns:

column metadata reader

createTableMetadataReader

protected abstract TableMetadataReader createTableMetadataReader()

Create a reader that handles table metadata.

Override this method in cases where a remote data source needs specific handling of table metadata

Returns:

table metadata reader

createIdentifierConverter

protected abstract IdentifierConverter createIdentifierConverter()

Create a converter that translates identifiers from the remote data source to the Exasol representation.

Returns:

identifier converter

getColumnMetadataReader

public final ColumnMetadataReader getColumnMetadataReader()

Get the remote column metadata reader.

Specified by:

getColumnMetadataReader in interface RemoteMetadataReader

Returns:

column metadata reader

getTableMetadataReader

public final TableMetadataReader getTableMetadataReader()

Get the table metadata reader.

Specified by:

getTableMetadataReader in interface RemoteMetadataReader

Returns:

table metadata reader

getIdentifierConverter

public IdentifierConverter getIdentifierConverter()

Get the identifier converter.

Returns:

identifier converter

readRemoteSchemaMetadata

public com.exasol.adapter.metadata.SchemaMetadata readRemoteSchemaMetadata()

Description copied from interface: RemoteMetadataReader

Read schema metadata from the remote data source.

Specified by:

readRemoteSchemaMetadata in interface RemoteMetadataReader

Returns:

remote schema metadata

readRemoteSchemaMetadata

public com.exasol.adapter.metadata.SchemaMetadata readRemoteSchemaMetadata(List<String> selectedTables)

Description copied from interface: RemoteMetadataReader

Read schema metadata for a selection of tables from the remote data source.

Specified by:

readRemoteSchemaMetadata in interface RemoteMetadataReader

Parameters:

selectedTables - selected tables

Returns:

remote schema metadata

getTableTypeFilter

protected String[] getTableTypeFilter()

Get the table type filter.

Returns:

supported table types

getSupportedTableTypes

public Set<String> getSupportedTableTypes()

Description copied from interface: RemoteMetadataReader

Get the table types the remote metadata reader supports.

Specified by:

getSupportedTableTypes in interface RemoteMetadataReader

Returns:

set of table type names

logTablesScan

protected void logTablesScan(String catalogName,
                             String schemaName)

Log the tables scanning.

Parameters:

catalogName - catalog name

schemaName - schema name

getSchemaAdapterNotes

public SchemaAdapterNotes getSchemaAdapterNotes()

Description copied from interface: RemoteMetadataReader

Create the schema adapter notes from database metadata.

Specified by:

getSchemaAdapterNotes in interface RemoteMetadataReader

Returns:

schema adapter notes