DynamicProperty (OGSA-DAI -- (c) International Business Machines Corporation, 2002-2006, The University of Edinburgh, 2002-2006)

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uk.org.ogsadai.common.properties
Class DynamicProperty

java.lang.Object
  |
  +--java.util.Observable
        |
        +--uk.org.ogsadai.common.properties.Property
              |
              +--uk.org.ogsadai.common.properties.DynamicProperty

public class DynamicProperty
extends Property

A property consisting of a name and a value - the value is not stored within this class. Rather requests for the value are forwarded to the class via a callback.

Author:: The OGSA-DAI Project Team

Field Summary
`private static java.lang.String`	`COPYRIGHT_NOTICE`
`protected PropertyCallback`	`mPropertyCallback` Object to callback to for the value of the property

Fields inherited from class uk.org.ogsadai.common.properties.Property

mName, mSecurityContext

Fields inherited from class java.util.Observable

Constructor Summary
`DynamicProperty()`

Method Summary
`static DynamicProperty`	`createDynamicProperty(javax.xml.namespace.QName name, java.lang.String callback)` Creates a dynamic resource property.
`PropertyCallback`	`getCallback()` Return the property callback object.
`java.lang.Object`	`getValue()` Return the property value.
`void`	`setCallback(PropertyCallback callback)` Set the property callback object.
`void`	`setSecurityContext(SecurityContext sec)` Set the security context for authorising property accessing and updating.
`void`	`setValue(java.lang.Object object)` Set the property value.

Methods inherited from class uk.org.ogsadai.common.properties.Property

getName, setName

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Field Detail

COPYRIGHT_NOTICE

private static final java.lang.String COPYRIGHT_NOTICE

See Also:: Constant Field Values

mPropertyCallback

protected PropertyCallback mPropertyCallback

Object to callback to for the value of the property

Constructor Detail

DynamicProperty

public DynamicProperty()

Method Detail

getCallback

public PropertyCallback getCallback()

Return the property callback object.

Returns:: the callback object.

setCallback

public void setCallback(PropertyCallback callback)

Set the property callback object.

Parameters:: callback - The callback object.

getValue

public java.lang.Object getValue()
                          throws PropertyValueException

Description copied from class: Property

Return the property value.

Specified by:: getValue in class Property

Returns:: the value for the property or null if it has not been set.
Throws:: PropertyValueException - if an error occurs when obtaining the value.

setValue

public void setValue(java.lang.Object object)
              throws PropertyValueException

Description copied from class: Property

Set the property value.

Specified by:: setValue in class Property

Parameters:: object - Property value.
Throws:: PropertyValueException - if an error occurs when setting the value.

setSecurityContext

public void setSecurityContext(SecurityContext sec)

Description copied from class: Property

Set the security context for authorising property accessing and updating.

Overrides:: setSecurityContext in class Property

Parameters:: sec - Security context.

createDynamicProperty

public static DynamicProperty createDynamicProperty(javax.xml.namespace.QName name,
                                                    java.lang.String callback)
                                             throws DynamicPropertyCreationException

Creates a dynamic resource property.

Parameters:: name - Qualified name of the resource property.; callback - Name of callback class. This class must implement the PropertyCallback class.
Returns:: dynamic resource property.
Throws:: DynamicPropertyCreationException - if the callback class cannot be loaded or found, an instance of this class cannot be created or if the class does not implement the PropertyCallback interface.