Package org.hibernate.dialect.sequence

Class NoSequenceSupport

java.lang.Object

org.hibernate.dialect.sequence.NoSequenceSupport

All Implemented Interfaces:

SequenceSupport

public class NoSequenceSupport
extends Object
implements SequenceSupport

An instance of SequenceSupport support indicating that the SQL dialect does not support sequences.

Field Summary

Fields

Modifier and Type	Field	Description
static SequenceSupport	INSTANCE

Constructor Summary

Constructors

Constructor	Description
NoSequenceSupport()

Method Summary

Modifier and Type	Method	Description
String	getCreateSequenceString(String sequenceName)	Typically dialects which support sequences can create a sequence with a single command.
String	getCreateSequenceString(String sequenceName, int initialValue, int incrementSize)	Typically dialects which support sequences can create a sequence with a single command.
String[]	getCreateSequenceStrings(String sequenceName, int initialValue, int incrementSize)	An optional multi-line form for databases which SequenceSupport.supportsPooledSequences().
String	getDropSequenceString(String sequenceName)	Typically dialects which support sequences can drop a sequence with a single command.
String[]	getDropSequenceStrings(String sequenceName)	The multiline script used to drop a sequence.
String	getSelectSequenceNextValString(String sequenceName)	Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.
String	getSequenceNextValString(String sequenceName)	Generate the appropriate select statement to to retrieve the next value of a sequence.
String	getSequenceNextValString(String sequenceName, int increment)	Generate the appropriate select statement to to retrieve the next value of a sequence.
boolean	supportsPooledSequences()	Does this dialect support "pooled" sequences.
boolean	supportsSequences()	Does this dialect support sequences?

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.dialect.sequence.SequenceSupport

getFromDual, getSelectSequencePreviousValString, getSequencePreviousValString, sometimesNeedsStartingValue, startingValue

Field Detail

INSTANCE

public static final SequenceSupport INSTANCE

Constructor Detail

NoSequenceSupport

public NoSequenceSupport()

Method Detail

supportsSequences

public boolean supportsSequences()

Description copied from interface: SequenceSupport

Does this dialect support sequences?

Specified by:

supportsSequences in interface SequenceSupport

Returns:

True if sequences supported; false otherwise.

supportsPooledSequences

public boolean supportsPooledSequences()

Description copied from interface: SequenceSupport

Does this dialect support "pooled" sequences. Not aware of a better name for this. Essentially can we specify the initial and increment values?

Specified by:

supportsPooledSequences in interface SequenceSupport

Returns:

True if such "pooled" sequences are supported; false otherwise.

See Also:

SequenceSupport.getCreateSequenceStrings(String, int, int), SequenceSupport.getCreateSequenceString(String, int, int)

getSequenceNextValString

public String getSequenceNextValString(String sequenceName)
                                throws MappingException

Description copied from interface: SequenceSupport

Generate the appropriate select statement to to retrieve the next value of a sequence.

This should be a stand alone select statement.

Specified by:

getSequenceNextValString in interface SequenceSupport

Parameters:

sequenceName - the name of the sequence

Returns:

String The select "next value" statement.

Throws:

MappingException - If sequences are not supported.

getSequenceNextValString

public String getSequenceNextValString(String sequenceName,
                                       int increment)
                                throws MappingException

Description copied from interface: SequenceSupport

Generate the appropriate select statement to to retrieve the next value of a sequence.

This should be a stand alone select statement.

Specified by:

getSequenceNextValString in interface SequenceSupport

Parameters:

sequenceName - the name of the sequence

increment - the increment, in case it needs to be passed explicitly

Returns:

String The select "next value" statement.

Throws:

MappingException - If sequences are not supported.

getSelectSequenceNextValString

public String getSelectSequenceNextValString(String sequenceName)
                                      throws MappingException

Description copied from interface: SequenceSupport

Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.

This differs from SequenceSupport.getSequenceNextValString(String) in that it must return an expression usable within another statement.

Specified by:

getSelectSequenceNextValString in interface SequenceSupport

Parameters:

sequenceName - the name of the sequence

Returns:

The "next value" fragment.

Throws:

MappingException - If sequences are not supported.

getCreateSequenceStrings

public String[] getCreateSequenceStrings(String sequenceName,
                                         int initialValue,
                                         int incrementSize)
                                  throws MappingException

Description copied from interface: SequenceSupport

An optional multi-line form for databases which SequenceSupport.supportsPooledSequences().

Specified by:

getCreateSequenceStrings in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

initialValue - The initial value to apply to 'create sequence' statement

incrementSize - The increment value to apply to 'create sequence' statement

Returns:

The sequence creation commands

Throws:

MappingException - If sequences are not supported.

getCreateSequenceString

public String getCreateSequenceString(String sequenceName)
                               throws MappingException

Description copied from interface: SequenceSupport

Typically dialects which support sequences can create a sequence with a single command. This method is a convenience making it easier to implement SequenceSupport.getCreateSequenceStrings(String,int,int) for these dialects.

The default definition is to return create sequence sequenceName for the argument sequenceName. Dialects need to override this method if a sequence created in this manner does not start at 1, or if the syntax is nonstandard.

Dialects which support sequences and can create a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to create a sequence should override SequenceSupport.getCreateSequenceStrings(String,int,int) instead.

Specified by:

getCreateSequenceString in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

Returns:

The sequence creation command

Throws:

MappingException - If sequences are not supported.

getCreateSequenceString

public String getCreateSequenceString(String sequenceName,
                                      int initialValue,
                                      int incrementSize)
                               throws MappingException

Description copied from interface: SequenceSupport

Typically dialects which support sequences can create a sequence with a single command. This method is a convenience making it easier to implement SequenceSupport.getCreateSequenceStrings(String,int,int) for these dialects.

Overloaded form of SequenceSupport.getCreateSequenceString(String), additionally taking the initial value and increment size to be applied to the sequence definition.

The default definition is to suffix SequenceSupport.getCreateSequenceString(String) with the string: start with initialValue increment by incrementSize for the arguments initialValue and incrementSize. Dialects need to override this method if different key phrases are used to apply the allocation information.

Specified by:

getCreateSequenceString in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

initialValue - The initial value to apply to 'create sequence' statement

incrementSize - The increment value to apply to 'create sequence' statement

Returns:

The sequence creation command

Throws:

MappingException - If sequences are not supported.

getDropSequenceStrings

public String[] getDropSequenceStrings(String sequenceName)
                                throws MappingException

Description copied from interface: SequenceSupport

The multiline script used to drop a sequence.

Specified by:

getDropSequenceStrings in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

Returns:

The sequence drop commands

Throws:

MappingException - If sequences are not supported.

getDropSequenceString

public String getDropSequenceString(String sequenceName)
                             throws MappingException

Description copied from interface: SequenceSupport

Typically dialects which support sequences can drop a sequence with a single command. This is convenience form of SequenceSupport.getDropSequenceStrings(java.lang.String) to help facilitate that.

Dialects which support sequences and can drop a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to drop a sequence should instead override SequenceSupport.getDropSequenceStrings(java.lang.String).

Specified by:

getDropSequenceString in interface SequenceSupport

Parameters:

sequenceName - The name of the sequence

Returns:

The sequence drop commands

Throws:

MappingException - If sequences are not supported.