com.hardcode.gdbms.engine.data.edition
Class MemoryInternalBuffer

java.lang.Object
  com.hardcode.gdbms.engine.data.edition.MemoryInternalBuffer

All Implemented Interfaces:

InternalBuffer

public class MemoryInternalBuffer
extends java.lang.Object
implements InternalBuffer

Constructor Summary

MemoryInternalBuffer()

Method Summary

void	addField()
void	deleteRow(long rowId)
Value	getFieldValue(long rowIndex, int fieldId)
long	insertRow(Value[] values) Inserts a row with data
void	removeField(int index)
void	restoreStatus() Restores the snapshot created in the last call to saveStatus
void	saveStatus() Creates a snapshot of the internalbuffer to restore it in the next call to restoreStatus
void	setFieldValue(long row, int modifiedField, Value modifiedValue)
void	setRow(long row, Value[] modifiedRow) Set the modified row at the specified index
void	start()
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryInternalBuffer

public MemoryInternalBuffer()

Method Detail

deleteRow

public void deleteRow(long rowId)
               throws DriverException

Throws:

DriverException

insertRow

public long insertRow(Value[] values)
               throws DriverException

Description copied from interface: InternalBuffer

Inserts a row with data

Specified by:

insertRow in interface InternalBuffer

Parameters:

values - values of the data to be inserted

Returns:

index where the row is inserted

Throws:

DriverException - if the operation fails

setRow

public void setRow(long row,
                   Value[] modifiedRow)
            throws DriverException

Description copied from interface: InternalBuffer

Set the modified row at the specified index

Specified by:

setRow in interface InternalBuffer

Parameters:

row - index of the row to update

modifiedRow - Value array with the update

Throws:

DriverException - if the update fails

setFieldValue

public void setFieldValue(long row,
                          int modifiedField,
                          Value modifiedValue)
                   throws DriverException

Specified by:

setFieldValue in interface InternalBuffer

Throws:

DriverException

start

public void start()
           throws DriverException

Specified by:

start in interface InternalBuffer

Throws:

DriverException

See Also:

DataSource.start()

stop

public void stop()
          throws DriverException

Specified by:

stop in interface InternalBuffer

Throws:

DriverException

See Also:

DataSource.stop()

getFieldValue

public Value getFieldValue(long rowIndex,
                           int fieldId)
                    throws DriverException

Specified by:

getFieldValue in interface InternalBuffer

Throws:

DriverException

See Also:

ReadAccess.getFieldValue(long, int)

removeField

public void removeField(int index)

Specified by:

removeField in interface InternalBuffer

addField

public void addField()

Specified by:

addField in interface InternalBuffer

saveStatus

public void saveStatus()

Description copied from interface: InternalBuffer

Creates a snapshot of the internalbuffer to restore it in the next call to restoreStatus

Specified by:

saveStatus in interface InternalBuffer

restoreStatus

public void restoreStatus()

Description copied from interface: InternalBuffer

Restores the snapshot created in the last call to saveStatus

Specified by:

restoreStatus in interface InternalBuffer