RecordExtractor (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.jca.cci.core
Interface RecordExtractor

All Known Implementing Classes:: MappingRecordOperation.RecordExtractorImpl

public interface RecordExtractor

Callback interface for extracting a result object from a CCI Record instance.

Used for output object creation in CciTemplate. Alternatively, output Records can also be returned to client code as-is. In case of a CCI ResultSet as execution result, you will almost always want to implement a RecordExtractor, to be able to read the ResultSet in a managed fashion, with the CCI Connection still open while reading the ResultSet.

Implementations of this interface perform the actual work of extracting results, but don't need to worry about exception handling. ResourceExceptions will be caught and handled correctly by the CciTemplate class.

Since:: 1.2
Author:: Thierry Templier, Juergen Hoeller
See Also:: CciTemplate.execute(javax.resource.cci.InteractionSpec, Record, RecordExtractor), CciTemplate.execute(javax.resource.cci.InteractionSpec, RecordCreator, RecordExtractor), ResultSet

Method Summary

Object extractData(Record record)
Process the data in the given Record, creating a corresponding result object.

Method Summary
`Object`	`extractData(Record record)` Process the data in the given Record, creating a corresponding result object.

Method Detail

extractData

Object extractData(Record record)
                   throws ResourceException,
                          SQLException,
                          DataAccessException

Process the data in the given Record, creating a corresponding result object.

Parameters:: record - the Record to extract data from (possibly a CCI ResultSet)
Returns:: an arbitrary result object, or null if none (the extractor will typically be stateful in the latter case)
Throws:: ResourceException - if thrown by a CCI method, to be auto-converted to a DataAccessException; SQLException - if thrown by a ResultSet method, to be auto-converted to a DataAccessException; DataAccessException - in case of custom exceptions
See Also:: ResultSet