ConfFile.h

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#ifndef CONF_FILE_H
#define CONF_FILE_H

#include "xercesDomUtil.h"

BOREALIS_NAMESPACE_BEGIN;

class ConfFile {
public:
    ConfFile();
    
    ConfFile(string file)
        throw (AuroraException);

    const DOMElement *getModuleTag(string module_name,
                                   XmlAttrReq req = ATTR_NOT_REQUIRED) const
        throw (AuroraBadEntityException);

    string getParameter(string module_name, string name,
                        XmlAttrReq req = ATTR_NOT_REQUIRED) const
        throw (AuroraBadEntityException);

    string getParameter(string module_name, string name, string def) const
        throw (AuroraBadEntityException);

    template <typename T>
    bool getTypedParameter(string module_name, string name, T& value,
                           XmlAttrReq req = ATTR_NOT_REQUIRED) const
        throw (AuroraBadEntityException);

private:
    typedef map<string, const DOMElement *> ModuleParams;

    struct ModuleInfo {
        const DOMElement * _elt;
        ModuleParams _params;
    };

    typedef map<string, ptr<ModuleInfo> > ModuleMap;

    ptr<DOMDocument> _doc;
    ModuleMap _modules;

    const ModuleInfo *ConfFile::getModuleInfo(string module_name,
                                              XmlAttrReq req = ATTR_NOT_REQUIRED) const
        throw (AuroraBadEntityException);
};

template <typename T>
bool ConfFile::getTypedParameter(string module_name, string name, T& value,
                                 XmlAttrReq req) const
    throw (AuroraBadEntityException)
{
    const ModuleInfo *info = getModuleInfo(module_name, req);
    if (!info) {
        if (req != ATTR_NOT_REQUIRED)
            Throw(AuroraBadEntityException,
                  "Missing module configuration for " + module_name);
        return false;
    }

    ModuleParams::const_iterator i = info->_params.find(name);
    if (i == info->_params.end()) {
        if (req != ATTR_NOT_REQUIRED)
            Throw(AuroraBadEntityException,
                  "Missing \"" + name + "\" parameter in module " + module_name);

        return false;
    }

    return xmlTypedAttribute(i->second, "value", value, ATTR_REQUIRED);
}

BOREALIS_NAMESPACE_END;

#endif

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