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/*
* Copyright (C) 2008 Patrick Ohly
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef INCL_EVOLUTION_PREFIX_CONFIG_NODE
# define INCL_EVOLUTION_PREFIX_CONFIG_NODE
#include <ConfigNode.h>
#include <boost/shared_ptr.hpp>
#include <map>
#include <utility>
#include <vector>
#include <string>
using namespace std;
/**
* This class acts as filter between a real config node and its user:
* a fixed prefix is added to each key when setting/getting a property.
* The list of properties only includes the key/value pairs with
* a matching prefix.
*
* The purpose is to have multiple users accessing the same underlying
* node without running into namespace conflicts.
*/
class PrefixConfigNode : public ConfigNode {
public:
/** read-write access to underlying node */
PrefixConfigNode(const string prefix,
const boost::shared_ptr<ConfigNode> &node);
/** read-only access to underlying node */
PrefixConfigNode(const string prefix,
const boost::shared_ptr<const ConfigNode> &node);
virtual string getName() const { return m_readOnlyNode->getName(); }
/* ConfigNode API */
virtual void flush();
virtual string readProperty(const string &property) const;
virtual void setProperty(const string &property,
const string &value,
const string &comment = "",
const string *defValue = NULL);
virtual void readProperties(map<string, string> &props) const;
virtual void removeProperty(const string &property);
virtual bool exists() const { return m_readOnlyNode->exists(); }
private:
string m_prefix;
boost::shared_ptr<ConfigNode> m_node;
boost::shared_ptr<const ConfigNode> m_readOnlyNode;
};
#endif
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