Package adams.db.types

Class AbstractTypes

java.lang.Object

adams.db.types.AbstractTypes

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

TypesH2, TypesMSSQL, TypesMySQL, TypesPostgreSQL, TypesSQLite

public abstract class AbstractTypes
extends Object
implements Serializable

Ancestor for SQL types classes.

Author:

FracPete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static Map<String,AbstractTypes>	m_Cache	for caching types on URLs.
protected static List<AbstractTypes>	m_Types	the available types.
static int	MAX_MEDIUMTEXT	max size of MEDIUMTEXT.
static int	MAX_TEXT	max size of TEXT.
static int	MAX_VARCHAR	max size of varchar.

Constructor Summary

Constructors

Constructor	Description
AbstractTypes()

Method Summary

Modifier and Type	Method	Description
int	actualSize(int type, int size)	Get the actual size of type.
abstract String	getAutoIncrementCreateType(int type)	Returns the type definition for auto increment types.
static AbstractTypes	getHandler(String url)	Returns the handler for the JDBC url.
abstract String	getTimestampDefault()	Returns the default used for timestamps.
abstract boolean	handles(String url)	Checks whether this URL is handled.
abstract String	toTypeString(int type, int size, boolean compare)	Get a string representation of this type for comparison or create purposes.
abstract boolean	usesTimestampDefault()	Whether a default is used for timestamps.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_VARCHAR

public static final int MAX_VARCHAR

max size of varchar.

See Also:

Constant Field Values

MAX_TEXT

public static final int MAX_TEXT

max size of TEXT.

See Also:

Constant Field Values

MAX_MEDIUMTEXT

public static final int MAX_MEDIUMTEXT

max size of MEDIUMTEXT.

See Also:

Constant Field Values

m_Cache

protected static Map<String,AbstractTypes> m_Cache

for caching types on URLs.

m_Types

protected static List<AbstractTypes> m_Types

the available types.

Constructor Detail

AbstractTypes

public AbstractTypes()

Method Detail

toTypeString

public abstract String toTypeString(int type,
                                    int size,
                                    boolean compare)

Get a string representation of this type for comparison or create purposes.

Parameters:

type - the type

size - the size

compare - if true then a string for comparison is returned, otherwise for creation

Returns:

string representation of this type

actualSize

public int actualSize(int type,
                      int size)

Get the actual size of type.

Returns:

size

getAutoIncrementCreateType

public abstract String getAutoIncrementCreateType(int type)

Returns the type definition for auto increment types.

Parameters:

type - the preferred type

Returns:

the definition for creating the column

usesTimestampDefault

public abstract boolean usesTimestampDefault()

Whether a default is used for timestamps.

Returns:

true if a default is used

getTimestampDefault

public abstract String getTimestampDefault()

Returns the default used for timestamps.

Returns:

the default, null if none used

handles

public abstract boolean handles(String url)

Checks whether this URL is handled.

Parameters:

url - the URL to check

Returns:

true if handled by this type class

getHandler

public static AbstractTypes getHandler(String url)

Returns the handler for the JDBC url.

Parameters:

url - the URL

Returns:

the handler

Throws:

IllegalArgumentException - if JDBC connection type not supported