TemplateParameters.cc

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/*
 * (C) Copyright 1996-2012 ECMWF.
 * 
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
 * In applying this licence, ECMWF does not waive the privileges and immunities 
 * granted to it by virtue of its status as an intergovernmental organisation nor
 * does it submit to any jurisdiction.
 */
 
///
/// \file TemplateParameters.cc
///
/// @author Piotr Kuchta, Feb 2009
 
#include "odc/TemplateParameters.h"
 
using namespace eckit;
using namespace odc::core;
 
namespace odc {
 
TemplateParameters::TemplateParameters()
: std::vector<TemplateParameter*>()
{}
 
TemplateParameters::~TemplateParameters() { reset(); }
 
void TemplateParameters::reset()
{
    for (size_t i = 0; i < size(); ++i)
        delete at(i);
    clear();
}
 
MetaData TemplateParameters::nullMD(0);
 
TemplateParameters::TemplateParameters(const std::string& fileNameTemplate, const MetaData& columns)
{
    parse(fileNameTemplate, *this, columns);
}
 
TemplateParameters& TemplateParameters::parse(const std::string& fileNameTemplate, TemplateParameters& params, const MetaData& columns)
{
    const std::string &t = fileNameTemplate;
 
    int start = 0;  
    for (;;)
    {
        size_t l = t.find("{", start);
        if (l == std::string::npos)
            break;
        start = l;
        size_t r = t.find("}", start);
        if (r == std::string::npos)
            throw eckit::UserError(std::string("TemplateParameters::parse: missing '}' while parsing '") + fileNameTemplate + "'");
        start = r;
 
        std::string name = t.substr(l + 1, r - l - 1);
        size_t index = &columns != &nullMD ? columns.columnIndex(name) : -1;
 
        params.push_back(new TemplateParameter(l, r, index, name)); 
 
        Log::debug() << "TemplateParameters::parse: new param: " << l << ", " << r << ", " << index << ", " << name << std::endl;
    }
    return params;
}
 
} // namespace odc