/*
 *
 *  Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
 *
 *  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.
 */

/* $Rev$ $Date: 2005/12/22 16:54:14 $ */

#ifndef _DATAGRAPHIMPL_H_
#define _DATAGRAPHIMPL_H_
#include "commonj/sdo/export.h"
#include "commonj/sdo/DataGraph.h"
#include "commonj/sdo/disable_warn.h"


namespace commonj{
namespace sdo{
    
/** 
 * DataGraphImpl implements the abstract class DataGraph.
 * DataGraph holds a whole graph of data objects, starting from
 * a single root. This class is not currently used in the C++
 * implementation, but will be required by DAS implementations.
 */

class DataGraphImpl : public DataGraph
{
     public:
    virtual ~DataGraphImpl();

    SDO_API DataGraphImpl(DataFactoryPtr fac);

    /**
     * Sets the root data object.
     * 
     */

    virtual SDO_API void setRootObject(DataObjectPtr dob);
 
    /**
     * Gets the root data object.
     *
     */
    
    virtual DataObjectPtr getRootObject();

    /**
     * Gets the name of the root data element (from the XML
     * description).
     *
     */

    virtual const char* getRootElementName();

    /**
     * Creates the root data object - for use by DAS implementations
     *
     */

    virtual DataObjectPtr createRootObject(const char* uri,
                        const char* name);

    /**
     * Creates the root data object - for use by DAS implementations
     *
     */


    virtual DataObjectPtr createRootObject(const Type& t);

    /**
     *
     * Gets the change summary if there is one.
     */

    virtual ChangeSummaryPtr getChangeSummary();

    /**
     *
     * Gets a type from the data factory.
     */

    virtual const Type& getType(const char* uri,
                            const char* name);

    private:

        DataFactoryPtr factory;
        DataObjectPtr root;

};
};
};
 
#endif //_DATAGRAPHIMPL_H_