Module com.hedera.hashgraph.sdk

Package com.hedera.hashgraph.sdk

Class TopicInfoQuery

java.lang.Object

com.hedera.hashgraph.sdk.Executable<TopicInfoQuery,Query,Response,TopicInfo>

com.hedera.hashgraph.sdk.Query<TopicInfo,TopicInfoQuery>

com.hedera.hashgraph.sdk.TopicInfoQuery

public final class TopicInfoQuery
extends Query<TopicInfo,TopicInfoQuery>

Retrieve the latest state of a topic.

This method is unrestricted and allowed on any topic by any payer account.

Nested Class Summary

Nested classes/interfaces inherited from class com.hedera.hashgraph.sdk.Executable

Executable.GrpcRequest

Field Summary

Fields

Modifier and Type	Field	Description
(package private) TopicId	topicId

Fields inherited from class com.hedera.hashgraph.sdk.Query

paymentTransactionId, paymentTransactions

Fields inherited from class com.hedera.hashgraph.sdk.Executable

attemptedAllNodes, blockingUnaryCall, grpcDeadline, logger, maxAttempts, maxBackoff, minBackoff, nodeAccountIds, nodes, random, RST_STREAM

Constructor Summary

Constructors

Constructor	Description
TopicInfoQuery()	Constructor.

Method Summary

Modifier and Type	Method	Description
(package private) io.grpc.MethodDescriptor<Query,Response>	getMethodDescriptor()	Called to direct the invocation of the query to the appropriate gRPC service.
TopicId	getTopicId()	Extract the topic id.
(package private) QueryHeader	mapRequestHeader(Query request)	The derived class should access its request header and return.
(package private) TopicInfo	mapResponse(Response response, AccountId nodeId, Query request)	Called after receiving the query response from Hedera.
(package private) ResponseHeader	mapResponseHeader(Response response)	The derived class should access its response header and return.
(package private) void	onMakeRequest(Query.Builder queryBuilder, QueryHeader header)	Called in Query.makeRequest() just before the query is built.
TopicInfoQuery	setTopicId(TopicId topicId)	Set the topic to retrieve info about (the parameters and running state of).
(package private) void	validateChecksums(Client client)	Validate the checksums.

Methods inherited from class com.hedera.hashgraph.sdk.Query

getCost, getCost, getCostAsync, getCostAsync, getCostAsync, getCostAsync, getCostAsync, getCostAsync, getOperatorFromClient, getPaymentTransaction, getPaymentTransactionId, getTransactionIdInternal, isPaymentRequired, makeRequest, mapResponseStatus, onExecute, onExecuteAsync, setMaxQueryPayment, setPaymentTransactionId, setQueryPayment, toString

Methods inherited from class com.hedera.hashgraph.sdk.Executable

advanceRequest, checkNodeAccountIds, execute, execute, executeAsync, executeAsync, executeAsync, executeAsync, executeAsync, executeAsync, getExecutionState, getGrpcRequest, getMaxAttempts, getMaxBackoff, getMaxRetry, getMinBackoff, getNodeAccountIds, getNodeForExecute, grpcDeadline, isBatchedAndNotBatchTransaction, logTransaction, mergeFromClient, setGrpcDeadline, setLogger, setMaxAttempts, setMaxBackoff, setMaxRetry, setMinBackoff, setNodeAccountIds, setNodesFromNodeAccountIds, setRequestListener, setResponseListener, shouldRetryExceptionally

Methods inherited from class java.lang.Object

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

Field Details

topicId

@Nullable
TopicId topicId

Constructor Details

TopicInfoQuery

public TopicInfoQuery()

Constructor.

Method Details

getTopicId

@Nullable
public TopicId getTopicId()

Extract the topic id.

Returns:

the topic id

setTopicId

public TopicInfoQuery setTopicId(TopicId topicId)

Set the topic to retrieve info about (the parameters and running state of).

Parameters:

topicId - The TopicId to be set

Returns:

this

validateChecksums

void validateChecksums(Client client)
                throws BadEntityIdException

Description copied from class: Query

Validate the checksums.

Specified by:

validateChecksums in class Query<TopicInfo,TopicInfoQuery>

Throws:

BadEntityIdException

onMakeRequest

void onMakeRequest(Query.Builder queryBuilder,
 QueryHeader header)

Description copied from class: Query

Called in Query.makeRequest() just before the query is built. The intent is for the derived class to assign their data variant to the query.

Specified by:

onMakeRequest in class Query<TopicInfo,TopicInfoQuery>

mapResponseHeader

ResponseHeader mapResponseHeader(Response response)

Description copied from class: Query

The derived class should access its response header and return.

Specified by:

mapResponseHeader in class Query<TopicInfo,TopicInfoQuery>

mapRequestHeader

QueryHeader mapRequestHeader(Query request)

Description copied from class: Query

The derived class should access its request header and return.

Specified by:

mapRequestHeader in class Query<TopicInfo,TopicInfoQuery>

mapResponse

TopicInfo mapResponse(Response response,
 AccountId nodeId,
 Query request)

Description copied from class: Executable

Called after receiving the query response from Hedera. The derived class should map into its output type.

Specified by:

mapResponse in class Executable<TopicInfoQuery,Query,Response,TopicInfo>

getMethodDescriptor

io.grpc.MethodDescriptor<Query,Response> getMethodDescriptor()

Description copied from class: Executable

Called to direct the invocation of the query to the appropriate gRPC service.

Specified by:

getMethodDescriptor in class Executable<TopicInfoQuery,Query,Response,TopicInfo>