org.omg.dds.core.policy

Interface TopicData

All Superinterfaces:

DDSObject, QosPolicy, QosPolicy.ForTopic, Serializable

public interface TopicData
extends QosPolicy.ForTopic

User data not known by the middleware, but distributed by means of built-in topics. The default value is an empty (zero-sized) sequence. Concerns: Topic RxO: No Changeable: Yes The purpose of this QoS is to allow the application to attach additional information to the created Topics such that when a remote application discovers their existence it can examine the information and use it in an application-defined way. In combination with the listeners on the DataReader and DataWriter as well as by means of operations such as DomainParticipant.ignoreTopic(org.omg.dds.core.InstanceHandle), these QoS can assist an application to extend the provided QoS.

Nested Class Summary

Nested classes/interfaces inherited from interface org.omg.dds.core.policy.QosPolicy

QosPolicy.ForDataReader, QosPolicy.ForDataWriter, QosPolicy.ForDomainParticipant, QosPolicy.ForDomainParticipantFactory, QosPolicy.ForPublisher, QosPolicy.ForSubscriber, QosPolicy.ForTopic

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	getValue() Get a copy of the data.
TopicData	withValue(byte[] value, int offset, int length) Copy this policy and override the value of the property.

Methods inherited from interface org.omg.dds.core.DDSObject

getEnvironment

Method Detail

getValue

byte[] getValue()

Get a copy of the data.

withValue

TopicData withValue(byte[] value,
                  int offset,
                  int length)

Copy this policy and override the value of the property.

Returns:

a new policy