org.datanucleus.store.rdbms.request

Class DeleteRequest

java.lang.Object

org.datanucleus.store.rdbms.request.Request

org.datanucleus.store.rdbms.request.DeleteRequest

public class DeleteRequest
extends Request

Class to provide a means of deletion of records from a data store. Extends basic request class implementing the execute method to do a JDBC delete operation. Provides a version check for optimistic handling.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.datanucleus.metadata.AbstractClassMetaData	cmd MetaData for the class.
protected boolean	versionChecks Whether we should make checks on optimistic version before updating.
protected org.datanucleus.metadata.VersionMetaData	versionMetaData MetaData for the version handling.

Fields inherited from class org.datanucleus.store.rdbms.request.Request

key, table

Constructor Summary

Constructors

Constructor and Description
DeleteRequest(DatastoreClass table, org.datanucleus.metadata.AbstractClassMetaData cmd, org.datanucleus.ClassLoaderResolver clr) Constructor, taking the table.

Method Summary

Modifier and Type	Method and Description
void	execute(org.datanucleus.state.ObjectProvider op) Method performing the deletion of the record from the datastore.

Methods inherited from class java.lang.Object

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

Field Detail

cmd

protected org.datanucleus.metadata.AbstractClassMetaData cmd

MetaData for the class.

versionMetaData

protected org.datanucleus.metadata.VersionMetaData versionMetaData

MetaData for the version handling.

versionChecks

protected boolean versionChecks

Whether we should make checks on optimistic version before updating.

Constructor Detail

DeleteRequest

public DeleteRequest(DatastoreClass table,
                     org.datanucleus.metadata.AbstractClassMetaData cmd,
                     org.datanucleus.ClassLoaderResolver clr)

Constructor, taking the table. Uses the structure of the datastore table to build a basic query.

Parameters:

table - The Class Table representing the datastore table to delete.

cmd - ClassMetaData of objects being deleted

clr - ClassLoader resolver

Method Detail

execute

public void execute(org.datanucleus.state.ObjectProvider op)

Method performing the deletion of the record from the datastore. Takes the constructed deletion query and populates with the specific record information.

Specified by:

execute in class Request

Parameters:

op - The ObjectProvider for the record to be deleted.