/*
* Copyright 2002-2008 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.jca.cci.core.support;
import javax.resource.cci.Connection;
import javax.resource.cci.ConnectionFactory;
import javax.resource.cci.ConnectionSpec;
import org.springframework.dao.support.DaoSupport;
import org.springframework.jca.cci.CannotGetCciConnectionException;
import org.springframework.jca.cci.connection.ConnectionFactoryUtils;
import org.springframework.jca.cci.core.CciTemplate;
/**
* Convenient super class for CCI-based data access objects.
*
* <p>Requires a {@link javax.resource.cci.ConnectionFactory} to be set,
* providing a {@link org.springframework.jca.cci.core.CciTemplate} based
* on it to subclasses through the {@link #getCciTemplate()} method.
*
* <p>This base class is mainly intended for CciTemplate usage but can
* also be used when working with a Connection directly or when using
* <code>org.springframework.jca.cci.object</code> classes.
*
* @author Thierry Templier
* @author Juergen Hoeller
* @since 1.2
* @see #setConnectionFactory
* @see #getCciTemplate
* @see org.springframework.jca.cci.core.CciTemplate
*/
public abstract class CciDaoSupport extends DaoSupport {
private CciTemplate cciTemplate;
/**
* Set the ConnectionFactory to be used by this DAO.
*/
public final void setConnectionFactory(ConnectionFactory connectionFactory) {
if (this.cciTemplate == null || connectionFactory != this.cciTemplate.getConnectionFactory()) {
this.cciTemplate = createCciTemplate(connectionFactory);
}
}
/**
* Create a CciTemplate for the given ConnectionFactory.
* Only invoked if populating the DAO with a ConnectionFactory reference!
* <p>Can be overridden in subclasses to provide a CciTemplate instance
* with different configuration, or a custom CciTemplate subclass.
* @param connectionFactory the CCI ConnectionFactory to create a CciTemplate for
* @return the new CciTemplate instance
* @see #setConnectionFactory(javax.resource.cci.ConnectionFactory)
*/
protected CciTemplate createCciTemplate(ConnectionFactory connectionFactory) {
return new CciTemplate(connectionFactory);
}
/**
* Return the ConnectionFactory used by this DAO.
*/
public final ConnectionFactory getConnectionFactory() {
return this.cciTemplate.getConnectionFactory();
}
/**
* Set the CciTemplate for this DAO explicitly,
* as an alternative to specifying a ConnectionFactory.
*/
public final void setCciTemplate(CciTemplate cciTemplate) {
this.cciTemplate = cciTemplate;
}
/**
* Return the CciTemplate for this DAO,
* pre-initialized with the ConnectionFactory or set explicitly.
*/
public final CciTemplate getCciTemplate() {
return this.cciTemplate;
}
@Override
protected final void checkDaoConfig() {
if (this.cciTemplate == null) {
throw new IllegalArgumentException("'connectionFactory' or 'cciTemplate' is required");
}
}
/**
* Obtain a CciTemplate derived from the main template instance,
* inheriting the ConnectionFactory and other settings but
* overriding the ConnectionSpec used for obtaining Connections.
* @param connectionSpec the CCI ConnectionSpec that the returned
* template instance is supposed to obtain Connections for
* @return the derived template instance
* @see org.springframework.jca.cci.core.CciTemplate#getDerivedTemplate(javax.resource.cci.ConnectionSpec)
*/
protected final CciTemplate getCciTemplate(ConnectionSpec connectionSpec) {
return getCciTemplate().getDerivedTemplate(connectionSpec);
}
/**
* Get a CCI Connection, either from the current transaction or a new one.
* @return the CCI Connection
* @throws org.springframework.jca.cci.CannotGetCciConnectionException
* if the attempt to get a Connection failed
* @see org.springframework.jca.cci.connection.ConnectionFactoryUtils#getConnection(javax.resource.cci.ConnectionFactory)
*/
protected final Connection getConnection() throws CannotGetCciConnectionException {
return ConnectionFactoryUtils.getConnection(getConnectionFactory());
}
/**
* Close the given CCI Connection, created via this bean's ConnectionFactory,
* if it isn't bound to the thread.
* @param con Connection to close
* @see org.springframework.jca.cci.connection.ConnectionFactoryUtils#releaseConnection
*/
protected final void releaseConnection(Connection con) {
ConnectionFactoryUtils.releaseConnection(con, getConnectionFactory());
}
}
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