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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.das;
import java.io.InputStream;
import java.sql.Connection;
import java.util.Iterator;
import org.apache.tuscany.das.config.Config;
import sun.misc.Service;
/**
* A DASFactory produces {@link DAS} instances.
*
*
*/
public abstract class DASFactory {
/**
* Return a concrete factory based on specific implementation namespace
* @param implementationNamespace
* @return
*/
public static DASFactory getInstance(String implementationNamespace){
return DASFactory.getInstance(implementationNamespace, DASFactory.class.getClassLoader());
}
/**
* Return a concrete factory based on specific implementation namespace and consider a given classloader
* @param implementationNamespace
* @param cl
* @return
*/
public static DASFactory getInstance(String implementationNamespace, ClassLoader cl){
DASFactory factoryInstance = null;
Iterator ps = Service.providers(DASFactory.class);
while(ps.hasNext()){
DASFactory factory = (DASFactory) ps.next();
if(factory.getNamespace().equalsIgnoreCase(implementationNamespace)) {
factoryInstance = factory;
break;
}
}
return factoryInstance;
}
/**
* Namespace that identifies the implementation
* @return
*/
public abstract String getNamespace();
/**
* Creates a DAS based on the provided config file stream
*
* @param configStream
* A stream over a DAS config file
* @return returns a DAS instance
*/
public abstract DAS createDAS(InputStream configStream);
/**
* Creates a DAS based on the provide config file stream and connection
* @param configStream
* @param connection
* @return
*/
public abstract DAS createDAS(InputStream configStream, Connection connection);
/**
* Creates a DAS based on the provided config
*
* @param config
* A DAS config object
* @return returns a DAS instance
*/
public abstract DAS createDAS(Config config);
/**
* Creates a DAS based on the provided config and connection
* @param config
* @param connection
* @return
*/
public abstract DAS createDAS(Config config, Connection connection);
/**
* Creates a DAS based on the provided connection
* @param connection
* @return
*/
public abstract DAS createDAS(Connection connection);
}
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