org.ow2.wildcat.hierarchy.attribute
Class QueryAttribute

java.lang.Object
  org.ow2.wildcat.hierarchy.attribute.QueryAttribute

All Implemented Interfaces:

com.espertech.esper.client.UpdateListener, Attribute, Mountable

public class QueryAttribute
extends java.lang.Object
implements Attribute, com.espertech.esper.client.UpdateListener

An attribute holding the result of a query.

Constructor Summary

QueryAttribute(java.lang.String queryString)
Construct a new query attribute whose generated events have the global scope.

QueryAttribute(java.lang.String queryString, WEventInterface.Scope scope)
Construct a new query attribute.

Method Summary

protected Context	getContext()
protected Path	getPath()
protected WEventInterface.Scope	getScope()
java.lang.Object	getValue()
boolean	isMount()
void	mount(Context context, Path mountPoint) Mount the Mountable.
java.lang.Object	setValue(java.lang.Object value) Set attribute's value.
void	unMount() Unmount the Mountable.
void	update(com.espertech.esper.event.EventBean[] newEvents, com.espertech.esper.event.EventBean[] oldEvents)

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryAttribute

public QueryAttribute(java.lang.String queryString)

Construct a new query attribute whose generated events have the global scope.

Parameters:

queryString - the associated query

QueryAttribute

public QueryAttribute(java.lang.String queryString,
                      WEventInterface.Scope scope)

Construct a new query attribute.

Parameters:

queryString - the associated query

scope - the scope of generated events

Method Detail

getValue

public java.lang.Object getValue()

Specified by:

getValue in interface Attribute

Returns:

attribute's value

setValue

public java.lang.Object setValue(java.lang.Object value)

Description copied from interface: Attribute

Set attribute's value.

Specified by:

setValue in interface Attribute

Parameters:

value - the new value

Returns:

the old value

getScope

protected WEventInterface.Scope getScope()

Returns:

the scope of generated events

getContext

protected Context getContext()

Returns:

the context where is mount this attribute

getPath

protected Path getPath()

Returns:

the path of this attribute

isMount

public boolean isMount()

Specified by:

isMount in interface Mountable

Returns:

true if is mount, false else.

mount

public void mount(Context context,
                  Path mountPoint)

Description copied from interface: Mountable

Mount the Mountable.

Specified by:

mount in interface Mountable

Parameters:

context - the context the Mountable is attached

mountPoint - the path to mount it

unMount

public void unMount()

Description copied from interface: Mountable

Unmount the Mountable.

Specified by:

unMount in interface Mountable

update

public void update(com.espertech.esper.event.EventBean[] newEvents,
                   com.espertech.esper.event.EventBean[] oldEvents)

Specified by:

update in interface com.espertech.esper.client.UpdateListener