de.intarsys.tools.component

Class StandardActivityContext

java.lang.Object

de.intarsys.tools.component.StandardActivityContext

All Implemented Interfaces:

IAttributeSupport, IActivityContext, IReferenceCounter

public class StandardActivityContext
extends Object
implements IActivityContext

A simple standard implementation for IActivityContext.

Field Summary

Fields inherited from interface de.intarsys.tools.component.IReferenceCounter

ATTR_REFERENCECOUNT

Constructor Summary

Constructors

Constructor and Description
StandardActivityContext()

Method Summary

Methods

Modifier and Type	Method and Description
Object	acquire() Indicate usage of the object.
Object	getAttribute(Object key) Get an attribute value from the context
int	getReferenceCount() The current "usage level".
void	release() Deprecated.
void	release(Object handle) The object is no longer needed.
Object	removeAttribute(Object key) Remove an attribute binding in the context
Object	setAttribute(Object key, Object value) Set the value of an attribute in the context

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardActivityContext

public StandardActivityContext()

Method Detail

acquire

public Object acquire()

Description copied from interface: IReferenceCounter

Indicate usage of the object. If valid, the reference count should increase and the method returns an opaque handle representing the "usage claim". This handle must be returned upon calling "release".

Specified by:

acquire in interface IReferenceCounter

Returns:

An opaque usage token

getAttribute

public Object getAttribute(Object key)

Description copied from interface: IAttributeSupport

Get an attribute value from the context

Specified by:

getAttribute in interface IAttributeSupport

Parameters:

key - the name of the attribute to get

Returns:

The value of the attribute key

getReferenceCount

public int getReferenceCount()

Description copied from interface: IReferenceCounter

The current "usage level". This is the number of unreleased "usage claims" via acquire.

Specified by:

getReferenceCount in interface IReferenceCounter

Returns:

The current "usage level".

release

@Deprecated
public void release()

Deprecated.

Description copied from interface: IReferenceCounter

Old style release method

Specified by:

release in interface IReferenceCounter

release

public void release(Object handle)

Description copied from interface: IReferenceCounter

The object is no longer needed. The reference count is decreased and the usage marked with the opaque handle is disposed.

Specified by:

release in interface IReferenceCounter

removeAttribute

public Object removeAttribute(Object key)

Description copied from interface: IAttributeSupport

Remove an attribute binding in the context

Specified by:

removeAttribute in interface IAttributeSupport

Parameters:

key - the name of the attribute to remove

Returns:

The previously associated value for key

setAttribute

public Object setAttribute(Object key,
                  Object value)

Description copied from interface: IAttributeSupport

Set the value of an attribute in the context

Specified by:

setAttribute in interface IAttributeSupport

Parameters:

key - the name of the attribute to set

value - the new value the attribute

Returns:

The previously associated value for key