Package org.fastnate.generator.statements

Class SequenceValueExpression

java.lang.Object

org.fastnate.generator.statements.SequenceValueExpression

All Implemented Interfaces:

ColumnExpression

Direct Known Subclasses:

CurrentSequenceValueExpression, NextSequenceValueExpression

public abstract class SequenceValueExpression
extends Object
implements ColumnExpression

Base class for ColumnExpressions which reference an ID by using the value of a sequence.

Author:

Tobias Liefke

Field Summary

Fields

Modifier and Type	Field	Description
private final long	difference	The difference of the referenced ID to the sequence value.
private final SequenceIdGenerator	sequence	The written sequence.

Constructor Summary

Constructors

Constructor	Description
SequenceValueExpression(SequenceIdGenerator sequence, long difference)	Creates a new SequenceValueExpression instance.

Method Summary

Modifier and Type	Method	Description
long	getDifference()	The difference of the referenced ID to the sequence value.
SequenceIdGenerator	getSequence()	The written sequence.
protected String	toSql(String sql)	Builds the SQL expression by using the given SQL and the current difference.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.fastnate.generator.statements.ColumnExpression

appendSql, toSql

Field Details

sequence

private final SequenceIdGenerator sequence

The written sequence.

difference

private final long difference

The difference of the referenced ID to the sequence value.

Constructor Details

SequenceValueExpression

public SequenceValueExpression(SequenceIdGenerator sequence,
 long difference)

Creates a new SequenceValueExpression instance.

Parameters:

sequence - The written sequence.

difference - The difference of the referenced ID to the sequence value.

Method Details

toSql

protected String toSql(String sql)

Builds the SQL expression by using the given SQL and the current difference.

Parameters:

sql - the SQL expression that references the sequence

Returns:

the SQL expression that references the sequence and respects the difference

getSequence

public SequenceIdGenerator getSequence()

The written sequence.

getDifference

public long getDifference()

The difference of the referenced ID to the sequence value.