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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.persistence.datasource;
import java.lang.reflect.InvocationTargetException;
import java.util.List;
import javax.sql.DataSource;
import org.apache.tuscany.spi.ObjectCreationException;
import org.apache.tuscany.spi.ObjectFactory;
/**
* Responsible for instantiating a DataSource provider class and initializing the actual <code>DataSource</code> . It
* must have a no-args constructor and may optionally implement {@link DataSourceProvider}. If it does not implement
* <code>DataSourceProvider</code>, then the provider class must implement the <code>DataSource<code> interface. A
* collection of {@link Injector}s is used to inject the provider instance with configuration parameters.
*
* @version $Rev$ $Date$
*/
public class ProviderObjectFactory implements ObjectFactory<DataSource> {
private Class<?> providerClass;
private List<Injector> injectors;
public ProviderObjectFactory(Class<?> providerClass, List<Injector> injectors) {
assert providerClass != null;
assert injectors != null;
this.providerClass = providerClass;
this.injectors = injectors;
}
public DataSource getInstance() throws ObjectCreationException {
try {
Object instance = providerClass.newInstance();
for (Injector injector : injectors) {
injector.inject(instance);
}
if (instance instanceof DataSourceProvider) {
DataSourceProvider dataSourceProvider = (DataSourceProvider) instance;
try {
dataSourceProvider.init();
return dataSourceProvider.getDataSource();
} catch (ProviderException e) {
throw new ObjectCreationException(e);
}
} else {
return (DataSource) instance;
}
} catch (InstantiationException e) {
throw new ObjectCreationException(e);
} catch (IllegalAccessException e) {
throw new ObjectCreationException(e);
} catch (InvocationTargetException e) {
throw new ObjectCreationException(e);
}
}
}
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