Class ExportWriteData

java.lang.Object

org.apache.derby.impl.load.ExportWriteDataAbstract

org.apache.derby.impl.load.ExportWriteData

All Implemented Interfaces:

PrivilegedExceptionAction<Object>

final class ExportWriteData
extends ExportWriteDataAbstract
implements PrivilegedExceptionAction<Object>

Field Summary

Fields

Modifier and Type	Field	Description
private OutputStreamWriter	aStream
private byte[]	byteBuf
private char[]	charBuf
private ByteArrayOutputStream	lobByteArrayStream
private OutputStreamWriter	lobCharStream
private long	lobFileOffset
private BufferedOutputStream	lobOutBinaryStream
private String	lobsFileName
private boolean	lobsInExtFile
private String	outputFileName

Fields inherited from class ExportWriteDataAbstract

columnDefinition, columnLengths, controlFileReader, dataCodeset, dataLocale, doubleDelimiter, fieldSeparator, fieldStartDelimiter, fieldStopDelimiter, format, hasDelimiterAtEnd, nullString, recordSeparator

Constructor Summary

Constructors

Constructor	Description
ExportWriteData(String outputFileName, String lobsFileName, ControlInfo controlFileReader)
ExportWriteData(String outputFileName, ControlInfo controlFileReader)

Method Summary

Modifier and Type	Method	Description
private void	init()
private String	makeDoubleDelimiterString(String inputString, String charDelimiter)	Convert the input string into double delimiter format for export. double character delimiter recognition in delimited format files applies to the export and import utilities.
void	noMoreRows()	if nothing more to write, then close the file and write a message of completion in message file
private void	openFiles()
final Object	run()
(package private) String	writeBinaryColumnToExternalFile(InputStream istream)	Writes the binary data in the given input stream to an external lob export file, and return it's location information in the file as string.
(package private) String	writeCharColumnToExternalFile(Reader ir)	Writes the clob data in the given input Reader to an external lob export file, and return it's location information in the file as string.
(package private) void	writeColumnDefinitionOptionally(String[] columnNames, String[] columnTypes)	if control file says true for column definition, write it as first line of the data file
void	writeData(String[] oneRow, boolean[] isNumeric)	write the passed row into the data file
private void	writeNextColumn(String oneColumn, boolean isNumeric)

Methods inherited from class ExportWriteDataAbstract

loadPropertiesInfo, setColumnLengths

Methods inherited from class Object

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

Field Details

outputFileName

private String outputFileName

lobsFileName

private String lobsFileName

lobsInExtFile

private boolean lobsInExtFile

lobFileOffset

private long lobFileOffset

aStream

private OutputStreamWriter aStream

lobCharStream

private OutputStreamWriter lobCharStream

lobOutBinaryStream

private BufferedOutputStream lobOutBinaryStream

lobByteArrayStream

private ByteArrayOutputStream lobByteArrayStream

byteBuf

private byte[] byteBuf

charBuf

private char[] charBuf

Constructor Details

ExportWriteData

ExportWriteData(String outputFileName,
 ControlInfo controlFileReader)
         throws Exception

Throws:

Exception

ExportWriteData

ExportWriteData(String outputFileName,
 String lobsFileName,
 ControlInfo controlFileReader)
         throws Exception

Throws:

Exception

Method Details

init

private void init()
           throws Exception

Throws:

Exception

run

public final Object run()
                 throws Exception

Specified by:

run in interface PrivilegedExceptionAction<Object>

Throws:

Exception

openFiles

private void openFiles()
                throws Exception

Throws:

Exception

writeColumnDefinitionOptionally

void writeColumnDefinitionOptionally(String[] columnNames,
 String[] columnTypes)
                              throws Exception

if control file says true for column definition, write it as first line of the data file

Specified by:

writeColumnDefinitionOptionally in class ExportWriteDataAbstract

Throws:

Exception - if there is an error

writeNextColumn

private void writeNextColumn(String oneColumn,
 boolean isNumeric)
                      throws Exception

Throws:

Exception

writeBinaryColumnToExternalFile

String writeBinaryColumnToExternalFile(InputStream istream)
                                throws Exception

Writes the binary data in the given input stream to an external lob export file, and return it's location information in the file as string. Location information is written in the main export file.

Specified by:

writeBinaryColumnToExternalFile in class ExportWriteDataAbstract

Parameters:

istream - input streams that contains a binary column data.

Returns:

Location where the column data written in the external file.

Throws:

Exception - if any error occurs while writing the data.

writeCharColumnToExternalFile

String writeCharColumnToExternalFile(Reader ir)
                              throws Exception

Writes the clob data in the given input Reader to an external lob export file, and return it's location information in the file as string. Location information is written in the main export file.

Specified by:

writeCharColumnToExternalFile in class ExportWriteDataAbstract

Parameters:

ir - Reader that contains a clob column data.

Returns:

Location where the column data written in the external file.

Throws:

Exception - if any error occurs while writing the data.

writeData

public void writeData(String[] oneRow,
 boolean[] isNumeric)
               throws Exception

write the passed row into the data file

Specified by:

writeData in class ExportWriteDataAbstract

Throws:

Exception - if there is an error

noMoreRows

public void noMoreRows()
                throws IOException

if nothing more to write, then close the file and write a message of completion in message file

Specified by:

noMoreRows in class ExportWriteDataAbstract

Throws:

Exception - if there is an error

IOException

makeDoubleDelimiterString

private String makeDoubleDelimiterString(String inputString,
 String charDelimiter)

Convert the input string into double delimiter format for export. double character delimiter recognition in delimited format files applies to the export and import utilities. Character delimiters are permitted within the character-based fields of a file. This applies to fields of type CHAR, VARCHAR, LONGVARCHAR, or CLOB. Any pair of character delimiters found between the enclosing character delimiters is imported into the database. For example with doble quote(") as character delimiter "What a ""nice""day!" will be imported as: What a "nice"day! In the case of export, the rule applies in reverse. For example, I am 6"tall. will be exported to a file as: "I am 6""tall."