com.mckoi.database
Class TableDescriptions

java.lang.Object
  com.mckoi.database.TableDescriptions

public final class TableDescriptions
extends java.lang.Object

An object that is a key part of Database. This object maintains a list of descriptions of all tables in the database. The list contains information about the columns in the table and any other misc table options.

Author:

Tobias Downer

Constructor Summary

TableDescriptions(java.io.File database_path)
Constructs this object with the database in the given directory.

Method Summary

boolean	exists() Returns true if the table descriptions file exists.
DataTableDef	getDef(java.lang.String table_name) Returns the DataTableDef object for the table with the given name.
java.lang.String[]	getTableList() Returns a list of table name's sorted in alphebetical order.
void	load() Load the entire list of table descriptions for this database.
void	save() Updates the table description file in the database.

Methods inherited from class java.lang.Object

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

Constructor Detail

TableDescriptions

public TableDescriptions(java.io.File database_path)

Constructs this object with the database in the given directory.

Method Detail

exists

public boolean exists()

Returns true if the table descriptions file exists.

load

public void load()
          throws java.io.IOException

Load the entire list of table descriptions for this database.

Throws:

java.io.IOException

save

public void save()
          throws java.io.IOException

Updates the table description file in the database. The table description file describes every table in the database. It is loaded when the database is initialized and refreshed whenever a table alteration occurs or the database is shut down.

Throws:

java.io.IOException

getTableList

public java.lang.String[] getTableList()

Returns a list of table name's sorted in alphebetical order.

getDef

public DataTableDef getDef(java.lang.String table_name)

Returns the DataTableDef object for the table with the given name. The description must have been loaded before this method is called. Returns null if the table was not found.