org.eclipse.scada.da.server.proxy.item

Class ProxyDataItem

java.lang.Object

org.eclipse.scada.da.server.common.DataItemBase

org.eclipse.scada.da.server.common.chain.DataItemBaseChained

org.eclipse.scada.da.server.common.chain.DataItemInputChained

org.eclipse.scada.da.server.common.chain.DataItemInputOutputChained

org.eclipse.scada.da.server.proxy.item.ProxyDataItem

All Implemented Interfaces:

DataItem

public class ProxyDataItem
extends DataItemInputOutputChained

Author:

Juergen Rose <juergen.rose@th4-systems.com>

Field Summary

Fields inherited from class org.eclipse.scada.da.server.common.chain.DataItemInputChained

primaryValue, secondaryValue

Fields inherited from class org.eclipse.scada.da.server.common.chain.DataItemBaseChained

chain, executor, primaryAttributes, secondaryAttributes

Fields inherited from class org.eclipse.scada.da.server.common.DataItemBase

listener

Constructor Summary

Constructors

Constructor and Description
ProxyDataItem(String id, ProxyValueHolder proxyValueHolder, ProxyWriteHandler writeHandler, Executor executor)

Method Summary

Modifier and Type	Method and Description
ProxyValueHolder	getProxyValueHolder()
protected WriteAttributeResults	processSetAttributes(Map<String,Variant> attributes, OperationParameters operationParameters)
protected void	processWriteCalculatedValue(Variant value, OperationParameters operationParameters)
void	setTemplateAttributes(Map<String,Variant> attributes, OperationParameters operationParameters)
NotifyFuture<WriteAttributeResults>	startSetAttributes(Map<String,Variant> attributes, OperationParameters operationParameters) This method sets the attributes.
protected NotifyFuture<WriteResult>	startWriteCalculatedValue(Variant value, OperationParameters operationParameters)

Methods inherited from class org.eclipse.scada.da.server.common.chain.DataItemInputOutputChained

startWriteValue

Methods inherited from class org.eclipse.scada.da.server.common.chain.DataItemInputChained

getCacheAttributes, getCacheValue, process, readValue, updateData

Methods inherited from class org.eclipse.scada.da.server.common.chain.DataItemBaseChained

addChainElement, addChainElement, getAttributes, getChainCopy, handleUnhandledAttributes, removeChainElement, setChain

Methods inherited from class org.eclipse.scada.da.server.common.DataItemBase

getInformation, handleListenerChange, notifyData, notifyData, setListener

Methods inherited from class java.lang.Object

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

Constructor Detail

ProxyDataItem

public ProxyDataItem(String id,
                     ProxyValueHolder proxyValueHolder,
                     ProxyWriteHandler writeHandler,
                     Executor executor)

Parameters:

id -

proxyValueHolder -

executor - the executor to use for write calls

Method Detail

getProxyValueHolder

public ProxyValueHolder getProxyValueHolder()

Returns:

object which holds the actual data

startSetAttributes

public NotifyFuture<WriteAttributeResults> startSetAttributes(Map<String,Variant> attributes,
                                                              OperationParameters operationParameters)

Description copied from class: DataItemBaseChained

This method sets the attributes.

It is intended to be overridden by subclasses that wish to handle attribute writes differently. The method needs to remove attributes from the parameter map that were handled and return a result for all attributes that were requested.

Specified by:

startSetAttributes in interface DataItem

Overrides:

startSetAttributes in class DataItemBaseChained

Parameters:

attributes - Attributes to set

Returns:

status for the attribute write request

processSetAttributes

protected WriteAttributeResults processSetAttributes(Map<String,Variant> attributes,
                                                     OperationParameters operationParameters)

Overrides:

processSetAttributes in class DataItemBaseChained

setTemplateAttributes

public void setTemplateAttributes(Map<String,Variant> attributes,
                                  OperationParameters operationParameters)

Parameters:

attributes -

startWriteCalculatedValue

protected NotifyFuture<WriteResult> startWriteCalculatedValue(Variant value,
                                                              OperationParameters operationParameters)

Specified by:

startWriteCalculatedValue in class DataItemInputOutputChained

processWriteCalculatedValue

protected void processWriteCalculatedValue(Variant value,
                                           OperationParameters operationParameters)
                                    throws NotConvertableException,
                                           InvalidOperationException

Throws:

NotConvertableException

InvalidOperationException