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// Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
// $Id$
#ifndef __CONFIG_DATA_H
#define __CONFIG_DATA_H 1
#include <string>
#include <vector>
#include <config/module_spec.h>
#include <exceptions/exceptions.h>
namespace isc {
namespace config {
/// This exception is thrown when the caller is trying to access
/// data that doesn't exist (i.e. with an identifier that does not
/// point to anything defined in the .spec file)
class DataNotFoundError : public isc::Exception {
public:
DataNotFoundError(const char* file, size_t line, const std::string& what) :
isc::Exception(file, line, what) {}
};
class ConfigData {
public:
/// Constructs a ConfigData option with no specification and an
/// empty configuration.
ConfigData() { _config = Element::createMap(); };
/// Constructs a ConfigData option with the given specification
/// and an empty configuration.
/// \param module_spec A ModuleSpec for the relevant module
ConfigData(const ModuleSpec& module_spec) : _module_spec(module_spec) { _config = Element::createMap(); }
virtual ~ConfigData() {};
/// Returns the value currently set for the given identifier
/// If no value is set, the default value (as specified by the
/// .spec file) is returned. If there is no value and no default,
/// an empty ElementPtr is returned.
/// Raises a DataNotFoundError if the identifier is bad.
/// \param identifier The identifier pointing to the configuration
/// value that is to be returned
ElementPtr getValue(const std::string& identifier);
/// Returns the value currently set for the given identifier
/// If no value is set, the default value (as specified by the
/// .spec file) is returned. If there is no value and no default,
/// an empty ElementPtr is returned.
/// Raises a DataNotFoundError if the identifier is bad.
/// \param is_default will be set to true if the value is taken
/// from the specifications item_default setting,
/// false otherwise
/// \param identifier The identifier pointing to the configuration
/// value that is to be returned
ElementPtr getValue(bool &is_default, const std::string& identifier);
/// Returns the ModuleSpec associated with this ConfigData object
const ModuleSpec getModuleSpec() { return (_module_spec); }
/// Set the ModuleSpec associated with this ConfigData object
void setModuleSpec(ModuleSpec module_spec) { _module_spec = module_spec; };
/// Set the local configuration (i.e. all non-default values)
/// \param config An ElementPtr pointing to a MapElement containing
/// *all* non-default configuration values. Existing values
/// will be removed.
void setLocalConfig(ElementPtr config) { _config = config; }
/// Returns the local (i.e. non-default) configuration.
/// \returns An ElementPtr pointing to a MapElement containing all
/// non-default configuration options.
ElementPtr getLocalConfig() { return (_config); }
/// Returns a list of all possible configuration options as specified
/// by the ModuleSpec.
/// \param identifier If given, show the items at the given identifier
/// (iff that is also a MapElement)
/// \param recurse If true, child MapElements will be traversed to
/// add their identifiers to the result list
/// \return An ElementPtr pointing to a ListElement containing
/// StringElements that specify the identifiers at the given
/// location (or all possible identifiers if identifier==""
/// and recurse==false)
ElementPtr getItemList(const std::string& identifier = "", bool recurse = false);
/// Returns all current configuration settings (both non-default and default).
/// \return An ElementPtr pointing to a MapElement containing
/// string->value elements, where the string is the
/// full identifier of the configuration option and the
/// value is an ElementPtr with the value.
ElementPtr getFullConfig();
private:
ElementPtr _config;
ModuleSpec _module_spec;
};
}
}
#endif
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