org.jboss.ejb.plugins.cmp.jdbc
Class JDBCLoadEntityCommand

java.lang.Object
  org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand

public final class JDBCLoadEntityCommand
extends Object

JDBCLoadEntityCommand loads the data for an instance from the table. This command implements specified eager loading. For CMP 2.x, the entity can be configured to only load some of the fields, which is helpful for entitys with lots of data.

Version:

$Revision: 1.36.2.2 $

Author:

Dain Sundstrom, Oleg Nitz, Rickard �berg, Marc Fleury, Joe Shevland, Justin Forder, Dirk Zimmermann, danch (Dan Christopherson), Alexey Loubyansky

Constructor Summary

JDBCLoadEntityCommand(JDBCStoreManager manager)

Method Summary

boolean	execute(EntityEnterpriseContext ctx, boolean failIfNotFound) Loads entity.
void	execute(JDBCCMPFieldBridge requiredField, EntityEnterpriseContext ctx) Loads entity or required field.

Methods inherited from class java.lang.Object

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

Constructor Detail

JDBCLoadEntityCommand

public JDBCLoadEntityCommand(JDBCStoreManager manager)
                      throws org.jboss.deployment.DeploymentException

Throws:

org.jboss.deployment.DeploymentException

Method Detail

execute

public boolean execute(EntityEnterpriseContext ctx,
                       boolean failIfNotFound)

Loads entity. If failIfNotFound is true and entity wasn't found then NoSuchEntityException is thrown. Otherwise, if entity wasn't found, returns false. If entity was loaded successfully return true.

Parameters:

ctx - - entity context;

failIfNotFound - - whether to fail if entity wasn't found;

Returns:

true if entity was loaded, false - otherwise.

execute

public void execute(JDBCCMPFieldBridge requiredField,
                    EntityEnterpriseContext ctx)

Loads entity or required field. If entity not found throws NoSuchEntityException.

Parameters:

requiredField - - required field or null;

ctx - - the corresponding context;