net.sf.farrago.fennel.calc
Enum AggOp

java.lang.Object
  java.lang.Enum<AggOp>
      net.sf.farrago.fennel.calc.AggOp

All Implemented Interfaces:

Serializable, Comparable<AggOp>

public enum AggOp
extends Enum<AggOp>

Enumeration of aggregate operations to be performed on aggregation buckets for windowed or streaming aggregation.

Since:

Feb 5, 2004

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/fennel/calc/AggOp.java#1 $

Author:

Jack Hahn

Enum Constant Summary

Add
Update bucket in response to new row.

Drop
Update bucket in response to row leaving window.

Init
Initialize bucket to zero or null values

InitAdd
Initialize bucket and update for new row.

None

Method Summary

static AggOp	valueOf(String name) Returns the enum constant of this type with the specified name.
static AggOp[]	values() Returns an array containing the constants of this enum type, in the order they're declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

None

public static final AggOp None

Init

public static final AggOp Init

Initialize bucket to zero or null values

Add

public static final AggOp Add

Update bucket in response to new row.

Drop

public static final AggOp Drop

Update bucket in response to row leaving window.

InitAdd

public static final AggOp InitAdd

Initialize bucket and update for new row.

Method Detail

values

public static final AggOp[] values()

Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants as follows:

for(AggOp c : AggOp.values())
        System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they're declared

valueOf

public static AggOp valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name