net.aerith.misao.database
Class XmlDBFileAccessor

java.lang.Object
  |
  +--net.aerith.misao.database.XmlDBFileAccessor

public class XmlDBFileAccessor

extends java.lang.Object

implements XmlDBAccessor

The XmlDBFileAccessor represents a sequential accessor to the elements in the primitive database. It keeps the current position in the database.

Field Summary

protected int	index_file The index in the file list.
protected int	index_record The index in the current XML document.
protected PrimitiveFileManager	manager The primitive database manager.
protected java.io.File[]	xml_files The list of XML files.
protected XmlDBRecord[]	xml_records The records in the current XML document.

Constructor Summary

XmlDBFileAccessor(PrimitiveFileManager manager)
Constructs a XmlDBFileAccessor of the specified database.

Method Summary

java.io.File	getCurrentFile() Gets the file which contains the current element.
XmlDBRecord	getFirstElement() Gets the first element in the database.
java.io.File	getNewFile() Gets the new file.
XmlDBRecord	getNextElement() Gets the next element in the database.
java.io.File	getVacantFile() Gets the file which has room to add the XML element.
void	initialize() Initializes.

Methods inherited from class java.lang.Object

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

Field Detail

manager

protected PrimitiveFileManager manager

The primitive database manager.

xml_files

protected java.io.File[] xml_files

The list of XML files.

index_file

protected int index_file

The index in the file list.

xml_records

protected XmlDBRecord[] xml_records

The records in the current XML document.

index_record

protected int index_record

The index in the current XML document.

Constructor Detail

XmlDBFileAccessor

public XmlDBFileAccessor(PrimitiveFileManager manager)

Constructs a XmlDBFileAccessor of the specified database.

Parameters:

manager - the primitive database manager.

Method Detail

initialize

public void initialize()

Initializes. Lists up all XML files in the database folder.

getVacantFile

public java.io.File getVacantFile()
                           throws java.io.IOException

Gets the file which has room to add the XML element.

Returns:

the file which has room to add the XML element.

Throws:

java.io.IOException - if I/O error occurs.

getNewFile

public java.io.File getNewFile()
                        throws java.io.IOException

Gets the new file.

Returns:

the new file.

Throws:

java.io.IOException - if I/O error occurs.

getCurrentFile

public java.io.File getCurrentFile()

Gets the file which contains the current element.

Returns:

the file which contains the current element.

getFirstElement

public XmlDBRecord getFirstElement()
                            throws java.io.IOException

Gets the first element in the database.

Specified by:

getFirstElement in interface XmlDBAccessor

Returns:

the XML element.

Throws:

java.io.IOException - if I/O error occurs.

getNextElement

public XmlDBRecord getNextElement()
                           throws java.io.IOException

Gets the next element in the database.

Specified by:

getNextElement in interface XmlDBAccessor

Returns:

the XML element.

Throws:

java.io.IOException - if I/O error occurs.