dk.dma.ais.filter

Class DownSampleFilter

java.lang.Object

dk.dma.ais.filter.MessageFilterBase

dk.dma.ais.filter.DownSampleFilter

All Implemented Interfaces:

IMessageFilter, IPacketFilter

@ThreadSafe
public class DownSampleFilter
extends MessageFilterBase

A down sampling filter.

For position reports 1,2,3,4 and 18, only one message will be forwarded within the give sampling rate. E.g. one message per minute.

For static reports 5 and 24 the same apply. But it is handled separately from the position reports.

All remaining message types are passed through without down sampling.

Constructor Summary

Constructors

Constructor and Description
DownSampleFilter() Empty contructor
DownSampleFilter(long samplingRate) Constructor given sampling rate in seconds

Method Summary

Modifier and Type	Method and Description
long	getSamplingRate() Get sampling rate in seconds
boolean	rejectedByFilter(AisMessage message) Rejected by filter boolean.
void	setSamplingRate(long samplingRate) Set sampling rate in seconds

Methods inherited from class dk.dma.ais.filter.MessageFilterBase

rejectedByFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

DownSampleFilter

public DownSampleFilter()

Empty contructor

DownSampleFilter

public DownSampleFilter(long samplingRate)

Constructor given sampling rate in seconds

Parameters:

samplingRate - the sampling rate

Method Detail

rejectedByFilter

public boolean rejectedByFilter(AisMessage message)

Description copied from interface: IMessageFilter

Rejected by filter boolean.

Parameters:

message - the message

Returns:

the boolean

getSamplingRate

public long getSamplingRate()

Get sampling rate in seconds

Returns:

sampling rate

setSamplingRate

public void setSamplingRate(long samplingRate)

Set sampling rate in seconds

Parameters:

samplingRate - the sampling rate