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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef CONFIGMGR_CONFIGCHANGE_HXX_
#define CONFIGMGR_CONFIGCHANGE_HXX_
#include "rtl/ref.hxx"
#include "configexcept.hxx"
#include <vector>
namespace configmgr
{
namespace configuration
{
//-----------------------------------------------------------------------------
class AbsolutePath;
class RelativePath;
class NodeRef;
class NodeID;
class SubNodeID;
class Tree;
//-----------------------------------------------------------------------------
class NodeChange;
class NodeChangeImpl;
class NodeChangeLocation;
class NodeChangeInformation;
class NodeChangesInformation;
//-----------------------------------------------------------------------------
/// represents a node position in some tree
class NodeChange
{
public:
/// constructs an empty (unchanging) node change
NodeChange();
/// constructs a node change with a given implementation
NodeChange(NodeChangeImpl* pImpl);
/// copies a node change with reference semantics
NodeChange(NodeChange const& rOther);
/// copies a node change with reference semantics
NodeChange& operator=(NodeChange const& rOther);
/// swaps the contents of this with another NodeChange
void swap(NodeChange& rOther);
/// destroys a node change
~NodeChange();
/// checks, if this may represent an actual change (might not be tested)
bool maybeChange() const;
/// checks, if this represents an actual change (PRE: must be tested)
bool isChange() const;
/// retrieve information about the changed data, appending to a sequence, returning the count
sal_uInt32 getChangeInfos(NodeChangesInformation& rInfo) const;
/// retrieve information about what node is changed
bool getChangeLocation(NodeChangeLocation& rLoc) const;
/// test whether this would really be a change (as close as possible)
NodeChange& test();
NodeChange const& test() const;
/// apply this change and check whether the target node changed
NodeChange& apply();
NodeChange const& apply() const;
// retrieve the tree where the change is actually taking place
rtl::Reference< Tree > getAffectedTree() const;
// retrieve the node where the change is actually taking place
NodeRef getAffectedNode() const;
// Comparison
friend bool operator==(NodeChange const& lhs, NodeChange const& rhs)
{
return lhs.m_pImpl == rhs.m_pImpl;
}
friend bool operator!=(NodeChange const& lhs, NodeChange const& rhs)
{
return lhs.m_pImpl != rhs.m_pImpl;
}
/// provides access to the internal Implementation for related classes
NodeChangeImpl* impl() const { return m_pImpl; }
private:
NodeChangeImpl* m_pImpl;
void init(), deinit();
};
/** represents a collection of updates to nodes (identified by <type>NodeChange</type>s) within a hierarchy of config entries
*/
class NodeChanges
{
public:
/// Constructs an empty collection of changes
NodeChanges();
/// checks whether there are any (non-empty) changes in this
bool isEmpty() const;
/// retrieves the total count of changes in this collection
std::vector<NodeChange>::size_type getCount() const { return m_aChanges.size(); }
/// retrieve information about the changed data, appending to a sequence, returning the count
sal_uInt32 getChangesInfos(NodeChangesInformation& rInfos) const;
/// test all changes
NodeChanges& test() { implTest(); return *this; }
NodeChanges const& test() const { implTest(); return *this; }
/// remove all changes known to be doing nothing from this collection.
NodeChanges& compact();
/** insert a change into this collection
*/
void add(NodeChange const& aChange);
/// returns an STL-style iterator to the first element of the collection
std::vector<NodeChange>::const_iterator begin() const { return m_aChanges.begin(); }
std::vector<NodeChange>::iterator begin() { return m_aChanges.begin(); }
/// returns an STL-style iterator to past the last element of the collection
std::vector<NodeChange>::const_iterator end() const { return m_aChanges.end(); }
std::vector<NodeChange>::iterator end() { return m_aChanges.end(); }
private:
void implTest() const;
std::vector<NodeChange> m_aChanges;
};
}
}
#endif // CONFIGMGR_CONFIGCHANGE_HXX_
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