Package org.odpi.openmetadata.adapters.connectors.datastore.csvfile

Class CSVFileStoreConnector

java.lang.Object

org.odpi.openmetadata.frameworks.connectors.Connector

org.odpi.openmetadata.frameworks.connectors.ConnectorBase

org.odpi.openmetadata.adapters.connectors.datastore.basicfile.BasicFileStoreConnector

org.odpi.openmetadata.adapters.connectors.datastore.csvfile.CSVFileStoreConnector

All Implemented Interfaces:

BasicFileStore, CSVFileStore

public class CSVFileStoreConnector
extends BasicFileStoreConnector
implements CSVFileStore

CSVFileStoreConnector works with structured files to retrieve simple tables of data.

Nested Class Summary

Nested classes/interfaces inherited from class org.odpi.openmetadata.frameworks.connectors.ConnectorBase

ConnectorBase.ProtectedConnection

Field Summary

Fields inherited from class org.odpi.openmetadata.adapters.connectors.datastore.basicfile.BasicFileStoreConnector

fileStoreName

Fields inherited from class org.odpi.openmetadata.frameworks.connectors.ConnectorBase

connectedAssetProperties, connectionBean, connectionProperties, connectorInstanceId, securedProperties

Constructor Summary

Constructors

Constructor	Description
CSVFileStoreConnector()

Method Summary

Modifier and Type	Method	Description
void	disconnect()	Close the file
List<String>	getColumnNames()	Return the list of column names associated with this structured file.
String	getFileName()	Return the name of the file to read.
Date	getLastUpdateDate()	Return the last update data for the file.
long	getRecordCount()	Return the number of records in the file.
void	initialize(String connectorInstanceId, ConnectionProperties connectionProperties)	Initialize the connector.
List<String>	readRecord(int dataRecordNumber)	Return the requested data record.

Methods inherited from class org.odpi.openmetadata.adapters.connectors.datastore.basicfile.BasicFileStoreConnector

getFile, getFile

Methods inherited from class org.odpi.openmetadata.frameworks.connectors.ConnectorBase

equals, getConnectedAssetProperties, getConnection, getConnectorInstanceId, hashCode, initializeConnectedAssetProperties, isActive, start, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.odpi.openmetadata.adapters.connectors.datastore.basicfile.BasicFileStore

getFile

Constructor Detail

CSVFileStoreConnector

public CSVFileStoreConnector()

Method Detail

initialize

public void initialize(String connectorInstanceId,
                       ConnectionProperties connectionProperties)

Initialize the connector.

Overrides:

initialize in class BasicFileStoreConnector

Parameters:

connectorInstanceId - - unique id for the connector instance - useful for messages etc

connectionProperties - - POJO for the configuration used to create the connector.

getFileName

public String getFileName()
                   throws FileException

Return the name of the file to read.

Specified by:

getFileName in interface CSVFileStore

Returns:

file name

Throws:

FileException - problem accessing the file

getLastUpdateDate

public Date getLastUpdateDate()
                       throws FileException

Return the last update data for the file.

Specified by:

getLastUpdateDate in interface CSVFileStore

Returns:

Date object

Throws:

FileException - problem accessing the file

getRecordCount

public long getRecordCount()
                    throws FileException,
                           FileReadException

Return the number of records in the file. This is achieved by scanning the file and counting the records - not recommended for very large files.

Specified by:

getRecordCount in interface CSVFileStore

Returns:

count

Throws:

FileException - problem accessing the file

FileReadException - unable to find, open or scan the file.

getColumnNames

public List<String> getColumnNames()
                            throws FileException,
                                   FileReadException

Return the list of column names associated with this structured file. This may be embedded in the first line of the file or encoded in the connection object used to create a connector instance.

Specified by:

getColumnNames in interface CSVFileStore

Returns:

a list of column names

Throws:

FileException - problem accessing the file

FileReadException - unable to retrieve the column names

readRecord

public List<String> readRecord(int dataRecordNumber)
                        throws FileException,
                               FileReadException

Return the requested data record. The first record is record 0. If the first line of the file is the column names then record 0 is the line following the column names.

Specified by:

readRecord in interface CSVFileStore

Parameters:

dataRecordNumber - long

Returns:

List of strings, each string is the value from the column.

Throws:

FileException - problem accessing the file

FileReadException - unable to find, open or read the file, or the file does not include the requested record.

disconnect

public void disconnect()

Close the file

Overrides:

disconnect in class BasicFileStoreConnector