org.eclipse.scada.da.master.mapper

Class MapperMasterHandler

java.lang.Object

org.eclipse.scada.da.master.AbstractMasterHandlerImpl

org.eclipse.scada.da.master.mapper.MapperMasterHandler

All Implemented Interfaces:

ValueMapperListener, MasterItemHandler

public class MapperMasterHandler
extends AbstractMasterHandlerImpl
implements ValueMapperListener

Field Summary

Fields inherited from class org.eclipse.scada.da.master.AbstractMasterHandlerImpl

eventAttributes

Constructor Summary

Constructors

Constructor and Description
MapperMasterHandler(String id, ObjectPoolTracker<MasterItem> poolTracker, ObjectPoolTracker<ValueMapper> mapperPoolTracker, int defaultPriority)

Method Summary

Methods

Modifier and Type	Method and Description
void	dataUpdate(Map<String,Object> context, DataItemValue.Builder builder) Called when data changed or the handler chain changed.
protected ValueMapper	getMapper()
protected void	setMapper(ValueMapper mapper)
void	stateChanged()
void	update(UserInformation userInformation, Map<String,String> parameters)

Methods inherited from class org.eclipse.scada.da.master.AbstractMasterHandlerImpl

addItem, createTrackers, dispose, getMasterItems, processWrite, removeItem, reprocess

Methods inherited from class java.lang.Object

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

Constructor Detail

MapperMasterHandler

public MapperMasterHandler(String id,
                   ObjectPoolTracker<MasterItem> poolTracker,
                   ObjectPoolTracker<ValueMapper> mapperPoolTracker,
                   int defaultPriority)

Method Detail

update

public void update(UserInformation userInformation,
          Map<String,String> parameters)
            throws Exception

Overrides:

update in class AbstractMasterHandlerImpl

Throws:

Exception

setMapper

protected void setMapper(ValueMapper mapper)

dataUpdate

public void dataUpdate(Map<String,Object> context,
              DataItemValue.Builder builder)

Description copied from interface: MasterItemHandler

Called when data changed or the handler chain changed.

The call gets a context object provided which each handler can use to store context information of one calculation run. Each calculation run gets a fresh new context. The context is intended to pass data from one handler to the next.

Although the value parameter is a mutable type, the handler may only make changes inside the dataUpdate method.

Specified by:

dataUpdate in interface MasterItemHandler

Specified by:

dataUpdate in class AbstractMasterHandlerImpl

Parameters:

context - the context object

builder - the changed value

getMapper

protected ValueMapper getMapper()

stateChanged

public void stateChanged()

Specified by:

stateChanged in interface ValueMapperListener