Package org.epics.archiverappliance.etl.conversion

Class ThruNumberAndStringConversion

java.lang.Object

org.epics.archiverappliance.etl.conversion.ThruNumberAndStringConversion

All Implemented Interfaces:

ConversionFunction

public class ThruNumberAndStringConversion
extends Object
implements ConversionFunction

Generic class for some standard type conversions. Not all type conversions are supported; some type conversions may be completely (or even worse, incompletely) inaccurate for your use case. Only a few of these have been tested and even those only incompletely. In most cases, you should roll your own conversion function and then apply using the ETLDest interface.

Author:

mshankar

Constructor Summary

Constructors

Constructor	Description
ThruNumberAndStringConversion(ArchDBRTypes destDBRType)

Method Summary

Modifier and Type	Method	Description
EventStream	convertStream(EventStream srcEventStream, Timestamp streamStartTime, Timestamp streamEndTime)
boolean	shouldConvert(EventStream srcEventStream, Timestamp streamStartTime, Timestamp streamEndTime)

Methods inherited from class java.lang.Object

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

Constructor Detail

ThruNumberAndStringConversion

public ThruNumberAndStringConversion(ArchDBRTypes destDBRType)

Method Detail

convertStream

public EventStream convertStream(EventStream srcEventStream,
                                 Timestamp streamStartTime,
                                 Timestamp streamEndTime)
                          throws IOException

Specified by:

convertStream in interface ConversionFunction

streamStartTime - . In the appliance, streams are often chunked. streamStartTime and streamEndTime are the boundaries of the chunk being converted.

Returns:

Throws:

IOException

shouldConvert

public boolean shouldConvert(EventStream srcEventStream,
                             Timestamp streamStartTime,
                             Timestamp streamEndTime)
                      throws IOException

Specified by:

shouldConvert in interface ConversionFunction

streamStartTime - . In the appliance, streams are often chunked. streamStartTime and streamEndTime are the boundaries of the chunk being converted.

Returns:

Throws:

IOException - Return true if there are any samples to convert in the source event stream. For example, in the failover merge usecase, one can check to see if the other server has any data during this time period. This provides a useful optimization in that files that no longer need to be converted are left unchanged.