Class ExportAbstract

java.lang.Object

org.apache.derby.impl.load.ExportAbstract

Direct Known Subclasses:

Export

abstract class ExportAbstract
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected Connection	con
protected ControlInfo	controlFileReader
protected String	entityName
protected ExportResultSetForObject	exportResultSetForObject
protected ExportWriteDataAbstract	exportWriteData
protected boolean	lobsInExtFile
protected String	schemaName
protected String	selectStatement

Constructor Summary

Constructors

Constructor	Description
ExportAbstract()

Method Summary

Modifier and Type	Method	Description
protected void	doAllTheWork()
protected ControlInfo	getControlFileReader()
protected abstract ExportWriteDataAbstract	getExportWriteData()
private String[]	getOneRowAtATime(ResultSet rs, boolean[] isLargeBinary, boolean[] isLargeChar)	convert resultset data for the current row to string array.
protected ResultSet	resultSetForEntity()
static String	stringifyObject(Object udt)

Methods inherited from class Object

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

Field Details

controlFileReader

protected ControlInfo controlFileReader

exportResultSetForObject

protected ExportResultSetForObject exportResultSetForObject

exportWriteData

protected ExportWriteDataAbstract exportWriteData

con

protected Connection con

entityName

protected String entityName

schemaName

protected String schemaName

selectStatement

protected String selectStatement

lobsInExtFile

protected boolean lobsInExtFile

Constructor Details

ExportAbstract

ExportAbstract()

Method Details

resultSetForEntity

protected ResultSet resultSetForEntity()
                                throws Exception

Throws:

Exception

getOneRowAtATime

private String[] getOneRowAtATime(ResultSet rs,
 boolean[] isLargeBinary,
 boolean[] isLargeChar)
                           throws Exception

convert resultset data for the current row to string array. If large objects are being exported to an external file, then write the lob data into the external file and store the lob data location in the string array for that column.

Parameters:

rs - resultset that contains the data to export.

isLargeBinary - boolean array, whose elements will be true, if the column type is blob/or other large binary type, otherwise false.

isLargeChar - boolean array, whose elements will be true, if the column type is clob/ other large char type, otherwise false.

Returns:

A string array of the row data to write to export file.

Throws:

Exception - if any errors during conversion.

stringifyObject

public static String stringifyObject(Object udt)
                              throws Exception

Throws:

Exception

getControlFileReader

protected ControlInfo getControlFileReader()

getExportWriteData

protected abstract ExportWriteDataAbstract getExportWriteData()
                                                       throws Exception

Throws:

Exception

doAllTheWork

protected void doAllTheWork()
                     throws Exception

Throws:

Exception