org.sqlite

Class Function.Aggregate

java.lang.Object

org.sqlite.Function

org.sqlite.Function.Aggregate

All Implemented Interfaces:

Cloneable

Direct Known Subclasses:

Function.Window

Enclosing class:

Function

public abstract static class Function.Aggregate
extends Function
implements Cloneable

Provides an interface for creating SQLite user-defined aggregate functions.

See Also:

Function

Nested Class Summary

Nested classes/interfaces inherited from class org.sqlite.Function

Function.Aggregate, Function.Window

Field Summary

Fields inherited from class org.sqlite.Function

FLAG_DETERMINISTIC

Constructor Summary

Constructors

Constructor and Description
Aggregate()

Method Summary

Modifier and Type	Method and Description
Object	clone()
protected abstract void	xFinal() Defines the abstract aggregate callback function
protected void	xFunc() Called by SQLite as a custom function.
protected abstract void	xStep() Defines the abstract aggregate callback function

Methods inherited from class org.sqlite.Function

args, create, create, create, destroy, destroy, error, result, result, result, result, result, result, value_blob, value_double, value_int, value_long, value_text, value_type

Methods inherited from class java.lang.Object

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

Constructor Detail

Aggregate

public Aggregate()

Method Detail

xFunc

protected final void xFunc()

Description copied from class: Function

Called by SQLite as a custom function. Should access arguments through value_*(int), return results with result(*) and throw errors with error(String).

Specified by:

xFunc in class Function

See Also:

Function.xFunc()

xStep

protected abstract void xStep()
                       throws SQLException

Defines the abstract aggregate callback function

Throws:

SQLException

See Also:

http://www.sqlite.org/c3ref/aggregate_context.html

xFinal

protected abstract void xFinal()
                        throws SQLException

Defines the abstract aggregate callback function

Throws:

SQLException

See Also:

http://www.sqlite.org/c3ref/aggregate_context.html

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class Object

Throws:

CloneNotSupportedException

See Also:

Object.clone()