Package edu.wpi.first.networktables

Class StringArrayTopic

java.lang.Object

edu.wpi.first.networktables.Topic

edu.wpi.first.networktables.StringArrayTopic

public final class StringArrayTopic
extends Topic

NetworkTables StringArray topic.

Field Summary

Fields

Modifier and Type	Field	Description
static String	kTypeString	The default type string for this topic type.

Fields inherited from class edu.wpi.first.networktables.Topic

m_handle, m_inst

Constructor Summary

Constructors

Constructor	Description
StringArrayTopic(NetworkTableInstance inst, int handle)	Constructor; use NetworkTableInstance.getStringArrayTopic() instead.
StringArrayTopic(Topic topic)	Construct from a generic topic.

Method Summary

Modifier and Type	Method	Description
StringArrayEntry	getEntry(String[] defaultValue, PubSubOption... options)	Create a new entry for the topic.
StringArrayEntry	getEntryEx(String typeString, String[] defaultValue, PubSubOption... options)	Create a new entry for the topic, with specified type string.
StringArrayPublisher	publish(PubSubOption... options)	Create a new publisher to the topic.
StringArrayPublisher	publishEx(String typeString, String properties, PubSubOption... options)	Create a new publisher to the topic, with type string and initial properties.
StringArraySubscriber	subscribe(String[] defaultValue, PubSubOption... options)	Create a new subscriber to the topic.
StringArraySubscriber	subscribeEx(String typeString, String[] defaultValue, PubSubOption... options)	Create a new subscriber to the topic, with specified type string.

Methods inherited from class edu.wpi.first.networktables.Topic

deleteProperty, equals, exists, genericPublish, genericPublishEx, genericSubscribe, genericSubscribe, getGenericEntry, getGenericEntry, getHandle, getInfo, getInstance, getName, getProperties, getProperty, getType, getTypeString, hashCode, isCached, isPersistent, isRetained, isValid, setCached, setPersistent, setProperties, setProperty, setRetained

Methods inherited from class java.lang.Object

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

Field Details

kTypeString

public static final String kTypeString

The default type string for this topic type.

See Also:

Constant Field Values

Constructor Details

StringArrayTopic

public StringArrayTopic(Topic topic)

Construct from a generic topic.

Parameters:

topic - Topic

StringArrayTopic

public StringArrayTopic(NetworkTableInstance inst, int handle)

Constructor; use NetworkTableInstance.getStringArrayTopic() instead.

Parameters:

inst - Instance

handle - Native handle

Method Details

subscribe

public StringArraySubscriber subscribe(String[] defaultValue, PubSubOption... options)

Create a new subscriber to the topic.

The subscriber is only active as long as the returned object is not closed.

Subscribers that do not match the published data type do not return any values. To determine if the data type matches, use the appropriate Topic functions.

Parameters:

defaultValue - default value used when a default is not provided to a getter function

options - subscribe options

Returns:

subscriber

subscribeEx

public StringArraySubscriber subscribeEx(String typeString, String[] defaultValue, PubSubOption... options)

Create a new subscriber to the topic, with specified type string.

The subscriber is only active as long as the returned object is not closed.

Subscribers that do not match the published data type do not return any values. To determine if the data type matches, use the appropriate Topic functions.

Parameters:

typeString - type string

defaultValue - default value used when a default is not provided to a getter function

options - subscribe options

Returns:

subscriber

publish

public StringArrayPublisher publish(PubSubOption... options)

Create a new publisher to the topic.

The publisher is only active as long as the returned object is not closed.

It is not possible to publish two different data types to the same topic. Conflicts between publishers are typically resolved by the server on a first-come, first-served basis. Any published values that do not match the topic's data type are dropped (ignored). To determine if the data type matches, use the appropriate Topic functions.

Parameters:

options - publish options

Returns:

publisher

publishEx

public StringArrayPublisher publishEx(String typeString, String properties, PubSubOption... options)

Create a new publisher to the topic, with type string and initial properties.

The publisher is only active as long as the returned object is not closed.

It is not possible to publish two different data types to the same topic. Conflicts between publishers are typically resolved by the server on a first-come, first-served basis. Any published values that do not match the topic's data type are dropped (ignored). To determine if the data type matches, use the appropriate Topic functions.

Parameters:

typeString - type string

properties - JSON properties

options - publish options

Returns:

publisher

Throws:

IllegalArgumentException - if properties is not a JSON object

getEntry

public StringArrayEntry getEntry(String[] defaultValue, PubSubOption... options)

Create a new entry for the topic.

Entries act as a combination of a subscriber and a weak publisher. The subscriber is active as long as the entry is not closed. The publisher is created when the entry is first written to, and remains active until either unpublish() is called or the entry is closed.

It is not possible to use two different data types with the same topic. Conflicts between publishers are typically resolved by the server on a first-come, first-served basis. Any published values that do not match the topic's data type are dropped (ignored), and the entry will show no new values if the data type does not match. To determine if the data type matches, use the appropriate Topic functions.

Parameters:

defaultValue - default value used when a default is not provided to a getter function

options - publish and/or subscribe options

Returns:

entry

getEntryEx

public StringArrayEntry getEntryEx(String typeString, String[] defaultValue, PubSubOption... options)

Create a new entry for the topic, with specified type string.

Entries act as a combination of a subscriber and a weak publisher. The subscriber is active as long as the entry is not closed. The publisher is created when the entry is first written to, and remains active until either unpublish() is called or the entry is closed.

It is not possible to use two different data types with the same topic. Conflicts between publishers are typically resolved by the server on a first-come, first-served basis. Any published values that do not match the topic's data type are dropped (ignored), and the entry will show no new values if the data type does not match. To determine if the data type matches, use the appropriate Topic functions.

Parameters:

typeString - type string

defaultValue - default value used when a default is not provided to a getter function

options - publish and/or subscribe options

Returns:

entry