org.hsqldb.scriptio
Class ScriptWriterText

java.lang.Object
  org.hsqldb.scriptio.ScriptWriterBase
      org.hsqldb.scriptio.ScriptWriterText

public class ScriptWriterText

extends ScriptWriterBase

Handles all logging to file operations. A log consists of three blocks:

LOG BLOCK: SQL statements logged since startup or the last CHECKPOINT
A related use for this class is for saving a current snapshot of the database data to a user-defined file. This happens in the SHUTDOWN COMPACT process or done as a result of the SCRIPT command. In this case, the DATA block contains the CACHED table data as well.

Since:

1.7.2

Version:

1.7.2

Author:

fredt@users

Field Summary

static byte[]

BYTES_LINE_SEP

Fields inherited from class org.hsqldb.scriptio.ScriptWriterBase

LIST_SCRIPT_FORMATS, SCRIPT_BINARY_172, SCRIPT_TEXT_170, SCRIPT_ZIPPED_BINARY_172

Constructor Summary

ScriptWriterText(Database db, String file, boolean includeCachedData, boolean newFile)

Method Summary

protected void	initBuffers()
protected void	openFile() File is opened in append mode although in current usage the file never pre-exists
protected void	writeDataTerm()
void	writeDeleteStatement(int sid, Table table, Object[] data)
void	writeLogStatement(String s, int sid)
void	writeRow(int sid, Table table, Object[] data)
void	writeSequenceStatement(int sid, NumberSequence seq)
protected void	writeSessionId(int sid)

Methods inherited from class org.hsqldb.scriptio.ScriptWriterBase

close, finishStream, newScriptWriter, setWriteDelay, size, sync, writeAll, writeDDL, writeExistingData, writeSingleColumnResult, writeTableInit, writeTableTerm

Methods inherited from class java.lang.Object

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

Field Detail

BYTES_LINE_SEP

public static byte[] BYTES_LINE_SEP

Constructor Detail

ScriptWriterText

public ScriptWriterText(Database db,
                        String file,
                        boolean includeCachedData,
                        boolean newFile)
                 throws HsqlException

Method Detail

initBuffers

protected void initBuffers()

Specified by:

initBuffers in class ScriptWriterBase

openFile

protected void openFile()
                 throws HsqlException

File is opened in append mode although in current usage the file never pre-exists

Overrides:

openFile in class ScriptWriterBase

Throws:

HsqlException

writeRow

public void writeRow(int sid,
                     Table table,
                     Object[] data)
              throws HsqlException,
                     IOException

Throws:

HsqlException

IOException

writeDataTerm

protected void writeDataTerm()
                      throws IOException

Specified by:

writeDataTerm in class ScriptWriterBase

Throws:

IOException

writeSessionId

protected void writeSessionId(int sid)
                       throws IOException

Specified by:

writeSessionId in class ScriptWriterBase

Throws:

IOException

writeLogStatement

public void writeLogStatement(String s,
                              int sid)
                       throws IOException,
                              HsqlException

Throws:

IOException

HsqlException

writeDeleteStatement

public void writeDeleteStatement(int sid,
                                 Table table,
                                 Object[] data)
                          throws HsqlException,
                                 IOException

Throws:

HsqlException

IOException

writeSequenceStatement

public void writeSequenceStatement(int sid,
                                   NumberSequence seq)
                            throws HsqlException,
                                   IOException

Throws:

HsqlException

IOException