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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.rdb;
import org.apache.tuscany.das.rdb.impl.DASFactoryImpl;
import commonj.sdo.DataObject;
/**
* A CommandGroup represents a set of {@link Command} and single {@link ApplyChangesCommand}
* that are created from a common config file.
*
*/
public interface DAS {
DASFactory FACTORY = new DASFactoryImpl();
/**
* The change history is scanned and modifications to the graph of data objects are flushed to the database.
*
* @param root
* the topmost containing data object
*/
void applyChanges(DataObject root);
/**
* Gets the named command from this factory's inventory
*
* @param name
* The identifying name of the requested command
* @return Returns the identified command
*/
Command getCommand(String name);
/**
* If the CommandGroup is managing connections then this method must be called
* when the client is done with the instance.
*
*/
void releaseResources();
/**
* Creates a Command based on the provided SQL statement
*
* @param sql
* The SQL statement
* @return returns a Command instance
*/
Command createCommand(String sql);
}
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