Module xl.impl

Package de.grogra.xl.impl.queues

Class QueueDescriptor<Q extends Queue>

java.lang.Object

de.grogra.xl.impl.queues.QueueDescriptor<Q>

Direct Known Subclasses:

GraphQueue.AddEdgeDescriptor, GraphQueue.AddNodeDescriptor, GraphQueue.AddUndirectedEdgeDescriptor, GraphQueue.ConnectDescriptor, GraphQueue.DeleteEdgeDescriptor, GraphQueue.DeleteNodeDescriptor, GraphQueue.ExecuteDescriptor, PropertyQueue.MakePersistentDescriptor, PropertyQueue.PropertyQueueDescriptor, VVQueue.Descriptor

public abstract class QueueDescriptor<Q extends Queue>
extends Object

A QueueDescriptor is a handle to the method QueueCollection.getQueue(QueueDescriptor), there it is used to instantiate a queue by createQueue(QueueCollection). In addition, a QueueDescriptor describes the order processing of queues (see QueueCollection.process(int[])) by its methods queuesToProcessBefore() and queuesToProcessAfter(). The methods equals and hashCode are overriden such that two descriptors are equal iff their classes are equal.

Author:

Ole Kniemeyer

Field Summary

Fields

Modifier and Type	Field	Description
static final QueueDescriptor[]	DESCRIPTOR_0	Immutable QueueDescriptor array of length 0.

Constructor Summary

Constructors

Constructor	Description
QueueDescriptor()

Method Summary

Modifier and Type	Method	Description
static void	addOrder(List<? super QueueDescriptor<?>> queueOrder)
abstract Q	createQueue(QueueCollection qc)	Creates a new Queue.
final boolean	equals(Object o)
final int	hashCode()
protected abstract QueueDescriptor[]	queuesToProcessAfter()	Returns the descriptors of queues which are to be applied after the queue of this descriptor.
protected abstract QueueDescriptor[]	queuesToProcessBefore()	Returns the descriptors of queues which are to be applied before the queue of this descriptor.

Methods inherited from class java.lang.Object

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

Field Details

DESCRIPTOR_0

public static final QueueDescriptor[] DESCRIPTOR_0

Immutable QueueDescriptor array of length 0.

Constructor Details

QueueDescriptor

public QueueDescriptor()

Method Details

addOrder

public static void addOrder(List<? super QueueDescriptor<?>> queueOrder)

equals

public final boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

queuesToProcessBefore

protected abstract QueueDescriptor[] queuesToProcessBefore()

Returns the descriptors of queues which are to be applied before the queue of this descriptor.

Returns:

descriptors of queues to be applied before this descriptor's queue

See Also:

• QueueCollection.process(int[])

queuesToProcessAfter

protected abstract QueueDescriptor[] queuesToProcessAfter()

Returns the descriptors of queues which are to be applied after the queue of this descriptor.

Returns:

descriptors of queues to be applied after this descriptor's queue

See Also:

• QueueCollection.process(int[])

createQueue

public abstract Q createQueue(QueueCollection qc)

Creates a new Queue. This method is invoked by QueueCollection.getQueue(QueueDescriptor).

Parameters:

qc - the invoking QueueCollection

Returns:

a new Queue instance corresponding to this descriptor