jhplot.io
Class HFileXML

java.lang.Object
  jhplot.io.HFileXML

public class HFileXML
extends Object

Open a XML file to write/read objects in sequential order using java serialization in XML. Do not forget apply close() at the end of run.

Author:

S.Chekanov

Field Summary

FileOutputStream	oof
ObjectOutputStream	oos
File	recordsFile

Constructor Summary

HFileXML(String file)
Open a XML file to write or read objects to/from a serialized file in sequential order.

HFileXML(String file, String option)
Open a XML file to write or read objects to/from a serialized file in sequential order.

HFileXML(String file, String option, int bufferSize)
Open a XML file to write or read objects to/from a serialized file in sequential order.

Method Summary

boolean	close() Close the file
int	getBufferSize() Get current buffer size for I/O.
int	getEntries() Get number of processed entries
Object	read() Get object from a file.
boolean	write(Object ob) Add an object to a XML file

Methods inherited from class java.lang.Object

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

Field Detail

recordsFile

public File recordsFile

oof

public FileOutputStream oof

oos

public ObjectOutputStream oos

Constructor Detail

HFileXML

public HFileXML(String file,
                String option,
                int bufferSize)

Open a XML file to write or read objects to/from a serialized file in sequential order. If "w" option is set, the old file will be removed. Use close() to flash the buffer and close the file. You can set buffer size for I/O . Make it larger for a heavy I/O. It is best to use buffer sizes that are multiples of 1024 bytes. That works best with most built-in buffering in hard disks.

Parameters:

file - File name

option - Option to create the file . If "w" - write a file (or read) file, if "r" only read created file.

bufferSize - set buffer size for I/O. It is best to use buffer sizes that are multiples of 1024 bytes.

HFileXML

public HFileXML(String file,
                String option)

Open a XML file to write or read objects to/from a serialized file in sequential order. If "w" option is set, the old file will be removed. The default buffer size is set to 12k.

Parameters:

file - File name

option - Option to create the file . If "w" - write a file (or read) file, if "r" only read created file.

HFileXML

public HFileXML(String file)

Open a XML file to write or read objects to/from a serialized file in sequential order. If "w" option is set, the old file will be removed.

Parameters:

file - File name for reading

Method Detail

getBufferSize

public int getBufferSize()

Get current buffer size for I/O.

write

public boolean write(Object ob)

Add an object to a XML file

Parameters:

ob - Object

key - key for object

Returns:

true if success

read

public Object read()

Get object from a file. Returns Null if the end of file reached.

Returns:

Object object or Null.

close

public boolean close()

Close the file

Returns:

getEntries

public int getEntries()

Get number of processed entries

Returns:

No of entries