PropertySubscriberBean

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equip.data.beans
Class PropertySubscriberBean

java.lang.Object
  java.beans.beancontext.BeanContextChildSupport
      equip.data.beans.PropertySubscriberBean

All Implemented Interfaces:: java.beans.beancontext.BeanContextChild, java.beans.beancontext.BeanContextServiceRevokedListener, java.beans.beancontext.BeanContextServicesListener, DataspaceEventListener, java.util.EventListener, java.io.Serializable

public class PropertySubscriberBean
extends java.beans.beancontext.BeanContextChildSupport
implements DataspaceEventListener

take a tuple from a dataspace and present as a bean property. monitors data item(s) of the form generated by PropertyPublisherBean and maps to a regular bean property and optionally sets anther beans property to match. This bean monitor assumes that there will only be at most one data item with the given class and item name. If more exist then the most recently added will be used. PropertyPublisherBean publishes a data item of class equip.data.Tuple with two fields. The first is a equip.data.StringBox with the nominal class name of the tuple, and the second is the property value itself (if a subclass of equip.runtime.ValueBase) or an equip.data.SerializedObject (if the property value is serializable). The name of the item (field of equip.data.ItemData) is also set by configuration to identify individual data items. The GUID is arbitrary and allocated on creation. To be active we need: - a dataspace (reference to equip.data.beans.DataspaceBean) - a tuple nominal class name (String) - a data item name (String) For the optional property push mode, i.e. setting another bean's property we also need: - a reference to the bean (java.lang.Object) - the name of the property to be set on that bean. In any case, the value is made available as the bean property 'value', of type java.lang.Object which supports PropertyChangeListeners.

See Also:: Serialized Form

Field Summary
`boolean`	`debug` debug
`protected DataSession`	`dsSession` dataspace callback session
`protected GUID`	`mCurrentItemId` dataspace current item id
`protected DataspaceBean`	`mDataspace` dataspace
`protected boolean`	`mIsConnected` active/connected
`protected java.lang.String`	`mItemClassName` item class name
`protected java.util.Vector`	`mItemIds` dataspace time-order list of matching item ids
`protected java.lang.String`	`mItemName` item name
`protected boolean`	`mPushActive` push active
`protected java.lang.Class`	`mPushPropertyClass` push target property type/class
`protected java.lang.String`	`mPushPropertyName` push target property name
`protected java.lang.Object`	`mPushTarget` push target as object
`protected java.lang.Object`	`mValue` last value

Fields inherited from class java.beans.beancontext.BeanContextChildSupport

beanContext, beanContextChildPeer, pcSupport, rejectedSetBCOnce, vcSupport

Constructor Summary
`PropertySubscriberBean()` no-arg constructor - required

Method Summary
`protected ItemData`	`createItemTemplate()` create item template
`void`	`dataspaceEvent(DataspaceEvent event)` notify of event (cf DataCallbackPost)
`void`	`firePropertyChange(java.lang.String propertyName, java.lang.Object oldValue, java.lang.Object newValue)` fire property changed
`DataspaceBean`	`getDataspace()` source getter
`boolean`	`getDebug()`
`java.lang.String`	`getItemClassName()` item name getter
`java.lang.String`	`getItemName()` item name getter
`java.lang.String`	`getPushPropertyName()` property name getter
`java.lang.Object`	`getPushTarget()` source getter
`java.lang.Object`	`getValue()` value proxy
`void`	`setDataspace(DataspaceBean dataspace)` dataspace setter - initialisation time only
`void`	`setDebug(boolean d)`
`void`	`setItemClassName(java.lang.String itemClassName)` item class name setter - initialisation time only
`void`	`setItemName(java.lang.String itemName)` item name setter - initialisation time only
`void`	`setPushPropertyName(java.lang.String pushPropertyName)` property name setter - initialisation time only
`void`	`setPushTarget(java.lang.Object pushTarget)` push target setter - initialisation time only

Methods inherited from class java.beans.beancontext.BeanContextChildSupport

addPropertyChangeListener, addVetoableChangeListener, fireVetoableChange, getBeanContext, getBeanContextChildPeer, initializeBeanContextResources, isDelegated, releaseBeanContextResources, removePropertyChangeListener, removeVetoableChangeListener, serviceAvailable, serviceRevoked, setBeanContext, validatePendingSetBeanContext

Methods inherited from class java.lang.Object

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

Field Detail

debug

public boolean debug

debug

mValue

protected java.lang.Object mValue

last value

mPushTarget

protected java.lang.Object mPushTarget

push target as object

mPushPropertyName

protected java.lang.String mPushPropertyName

push target property name

mPushPropertyClass

protected java.lang.Class mPushPropertyClass

push target property type/class

mDataspace

protected DataspaceBean mDataspace

dataspace

mItemName

protected java.lang.String mItemName

item name

mItemClassName

protected java.lang.String mItemClassName

item class name

mIsConnected

protected boolean mIsConnected

active/connected

mPushActive

protected boolean mPushActive

push active

mCurrentItemId

protected GUID mCurrentItemId

dataspace current item id

mItemIds

protected java.util.Vector mItemIds

dataspace time-order list of matching item ids

dsSession

protected DataSession dsSession

dataspace callback session

Constructor Detail