Package org.springframework.data.cassandra.core.cql

Class ReactiveRowMapperResultSetExtractor<T>

java.lang.Object

org.springframework.data.cassandra.core.cql.ReactiveRowMapperResultSetExtractor<T>

All Implemented Interfaces:

ReactiveResultSetExtractor<T>

public class ReactiveRowMapperResultSetExtractor<T>
extends Object
implements ReactiveResultSetExtractor<T>

Adapter implementation of the ReactiveResultSetExtractor interface that delegates to a RowMapper which is supposed to create an object for each row. Each object is emitted through the Publisher of this ReactiveResultSetExtractor.

Useful for the typical case of one object per row in the database table. The number of entries in the results will match the number of rows.

Note that a RowMapper object is typically stateless and thus reusable.

Since:

2.0

Author:

Mark Paluch

See Also:

• RowMapper
• ReactiveCqlTemplate

Constructor Summary

Constructors

Constructor	Description
ReactiveRowMapperResultSetExtractor(RowMapper<T> rowMapper)	Create a new ReactiveRowMapperResultSetExtractor.

Method Summary

Modifier and Type	Method	Description
org.reactivestreams.Publisher<T>	extractData(ReactiveResultSet resultSet)	Implementations must implement this method to process the entire ReactiveResultSet.

Methods inherited from class java.lang.Object

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

Constructor Details

ReactiveRowMapperResultSetExtractor

public ReactiveRowMapperResultSetExtractor(RowMapper<T> rowMapper)

Create a new ReactiveRowMapperResultSetExtractor.

Parameters:

rowMapper - the RowMapper which creates an object for each row, must not be null.

Method Details

extractData

public org.reactivestreams.Publisher<T> extractData(ReactiveResultSet resultSet)
                                             throws com.datastax.oss.driver.api.core.DriverException,
org.springframework.dao.DataAccessException

Description copied from interface: ReactiveResultSetExtractor

Implementations must implement this method to process the entire ReactiveResultSet.

Specified by:

extractData in interface ReactiveResultSetExtractor<T>

Parameters:

resultSet - ReactiveResultSet to extract data from, must not be null.

Returns:

an arbitrary result object Publisher.

Throws:

com.datastax.oss.driver.api.core.DriverException - if a DriverException is encountered getting column values or navigating (that is, there's no need to catch DriverException).

org.springframework.dao.DataAccessException - in case of custom exceptions.