dk.dma.ais.tracker.targetTracker

Class TargetTracker

java.lang.Object

dk.dma.ais.tracker.targetTracker.TargetTracker

All Implemented Interfaces:

Tracker

public class TargetTracker
extends Object
implements Tracker

A simple tracker that keeps track of targets.

There are no automatically cleanup instead users must regularly cleanup targets by calling removeAll(Predicate)

Author:

Kasper Nielsen, Jens Tuxen

Constructor Summary

Constructors

Constructor and Description
TargetTracker()

Method Summary

Modifier and Type	Method and Description
int	count(Predicate<? super AisPacketSource> predicate) Returns the number of targets that is being tracked.
int	countNumberOfReports() Returns the total number of reports for all targets.
TargetInfo	get(int mmsi) Returns the latest target info for the specified MMSI number.
TargetInfo	get(int mmsi, Predicate<? super AisPacketSource> sourcePredicate) Get target info.
Set<AisPacketSource>	getPacketSourcesForMMSI(int mmsi) Returns a set of all packet sources for a given MMSI number.
void	removeAll(BiPredicate<? super AisPacketSource,? super TargetInfo> predicate) Removes all targets that are accepted by the specified predicate.
void	removeAll(Predicate<? super TargetInfo> predicate) Removes all targets that are accepted by the specified predicate.
int	size() Returns the number of targets that is being tracked.
Stream<TargetInfo>	stream() Creates a parallel stream of all targets.
Stream<TargetInfo>	stream(Predicate<? super AisPacketSource> sourcePredicate) Creates a parallel stream of targets with the specified source predicate.
Stream<TargetInfo>	stream(Predicate<? super AisPacketSource> sourcePredicate, Predicate<? super TargetInfo> targetPredicate) Creates a sequential stream of targets with the specified source predicate and matching the given targetPredicate.
Stream<TargetInfo>	streamSequential() Creates a sequential stream of all targets.
Stream<TargetInfo>	streamSequential(Predicate<? super AisPacketSource> sourcePredicate) Creates a sequential stream of targets with the specified source predicate.
Stream<TargetInfo>	streamSequential(Predicate<? super AisPacketSource> sourcePredicate, Predicate<? super TargetInfo> targetPredicate) Creates a sequential stream of targets with the specified source predicate and matching the given targetPredicate.
void	update(AisPacket packet) Updates the tracker with the specified packet

Methods inherited from class java.lang.Object

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

Methods inherited from interface dk.dma.ais.tracker.Tracker

subscribeToPacketReader, subscribeToPacketStream

Constructor Detail

TargetTracker

public TargetTracker()

Method Detail

count

public int count(Predicate<? super AisPacketSource> predicate)

Returns the number of targets that is being tracked. This is usually a lot faster than invoking stream(predicate).count()

Parameters:

predicate - the predicate

Returns:

the number of targets that is being tracked

countNumberOfReports

public int countNumberOfReports()

Returns the total number of reports for all targets. Each target might have multiple reports.

Returns:

the total number of reports for all targets

get

public TargetInfo get(int mmsi)

Returns the latest target info for the specified MMSI number.

Specified by:

get in interface Tracker

Parameters:

mmsi - the MMSI number

Returns:

the latest target info for the specified MMSI number

get

public TargetInfo get(int mmsi,
                      Predicate<? super AisPacketSource> sourcePredicate)

Get target info.

Parameters:

mmsi - the mmsi

sourcePredicate - the source predicate

Returns:

the target info

getPacketSourcesForMMSI

public Set<AisPacketSource> getPacketSourcesForMMSI(int mmsi)

Returns a set of all packet sources for a given MMSI number.

Parameters:

mmsi - the MMSI number

Returns:

a set of all packet sources for a given MMSI number

removeAll

public void removeAll(Predicate<? super TargetInfo> predicate)

Removes all targets that are accepted by the specified predicate. Is typically used to remove targets based on time stamps.

Parameters:

predicate - the predicate that selects which items to remove

removeAll

public void removeAll(BiPredicate<? super AisPacketSource,? super TargetInfo> predicate)

Removes all targets that are accepted by the specified predicate. Is typically used to remove targets based on time stamps.

Parameters:

predicate - the predicate that selects which items to remove

size

public int size()

Returns the number of targets that is being tracked.

Specified by:

size in interface Tracker

Returns:

the number of targets that is being tracked

See Also:

count(Predicate)

stream

public Stream<TargetInfo> stream()

Creates a parallel stream of all targets.

Returns:

a stream of targets

stream

public Stream<TargetInfo> stream(Predicate<? super AisPacketSource> sourcePredicate)

Creates a parallel stream of targets with the specified source predicate.

Parameters:

sourcePredicate - the predicate on AIS packet source

Returns:

a stream of targets

stream

public Stream<TargetInfo> stream(Predicate<? super AisPacketSource> sourcePredicate,
                                 Predicate<? super TargetInfo> targetPredicate)

Creates a sequential stream of targets with the specified source predicate and matching the given targetPredicate.

Parameters:

sourcePredicate - the source predicate

targetPredicate - the target predicate

Returns:

a stream of targets

streamSequential

public Stream<TargetInfo> streamSequential()

Creates a sequential stream of all targets.

Returns:

a stream of targets

streamSequential

public Stream<TargetInfo> streamSequential(Predicate<? super AisPacketSource> sourcePredicate)

Creates a sequential stream of targets with the specified source predicate.

Parameters:

sourcePredicate - the predicate on AIS packet source

Returns:

a stream of targets

streamSequential

public Stream<TargetInfo> streamSequential(Predicate<? super AisPacketSource> sourcePredicate,
                                           Predicate<? super TargetInfo> targetPredicate)

Creates a sequential stream of targets with the specified source predicate and matching the given targetPredicate.

Parameters:

sourcePredicate - the source predicate

targetPredicate - the target predicate

Returns:

a stream of targets

update

public void update(AisPacket packet)

Updates the tracker with the specified packet

Specified by:

update in interface Tracker

Parameters:

packet - the packet to update the trigger with