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 *
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
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 * $RCSfile: roottree.hxx,v $
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#ifndef CONFIGMGR_ROOTTREE_HXX_
#define CONFIGMGR_ROOTTREE_HXX_

#include "sal/config.h"

#include <memory>

#include "boost/utility.hpp"
#include "rtl/ref.hxx"

#include "utility.hxx"

namespace configmgr
{
//-----------------------------------------------------------------------------
    namespace sharable { union Node; }
    class SubtreeChange;
    struct TreeChangeList;

    namespace configuration
    {
//-----------------------------------------------------------------------------
        class Tree;
        class NodeRef;
        class NodeChangesInformation;
        class AbsolutePath;
        class TemplateProvider;

//-----------------------------------------------------------------------------

        rtl::Reference< Tree > createReadOnlyTree(  AbsolutePath const& aRootPath,
                                                    sharable::Node * _aCacheNode,
                                        unsigned int nDepth,
                                        TemplateProvider const& aTemplateProvider);

        rtl::Reference< Tree > createUpdatableTree( AbsolutePath const& aRootPath,
                                                    sharable::Node * _aCacheNode,
                                        unsigned int nDepth,
                                        TemplateProvider const& aTemplateProvider);

//-----------------------------------------------------------------------------
        class CommitHelper: private boost::noncopyable
        {
            struct Data;

            std::auto_ptr<Data> m_pData;
            Tree*           m_pTree;
        public:
            CommitHelper(rtl::Reference< Tree > const& aTree);
            ~CommitHelper();

            // collect all changes into rChangeList
            bool prepareCommit(TreeChangeList& rChangeList);

            // finish and clean up the changes in rChangeList after they are integrated
            void finishCommit(TreeChangeList& rChangeList);
            // throw away and clean up the changes in rChangeList after a commit failed
            void failedCommit(TreeChangeList& rChangeList);
        };

//-----------------------------------------------------------------------------
        /** adjusts <var>aTree</var> tree to the (externally produced) changes under <var>aExternalChanges</var>
            and collects the changes this induces locally.
            @param rLocalChanges
                a collection that will hold the changes induced by <var>aExternalChanges</var>.
            @param aExternalChanges
                a structured change that has already been applied to the master tree.
            @param aBaseTree
                the tree that contains (directly) the affected node of <var>aExternalChanges</var>.
            @param aBaseNode
                a NodeRef referring to the (directly) affected node of <var>aExternalChanges</var>.
            @return
                <TRUE/> if any changes occur in this tree (so rLocalChanges is not empty), <FALSE/> otherwise.

        */
        bool adjustToChanges(   NodeChangesInformation& rLocalChanges,
                                rtl::Reference< Tree > const& aBaseTree, NodeRef const& aBaseNode,
                                SubtreeChange const& aExternalChange) ;


//-----------------------------------------------------------------------------
    }
}

#endif // CONFIGMGR_ROOTTREE_HXX_