Span.h

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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.
 */
 
#ifndef odc_core_Span_H
#define odc_core_Span_H
 
#include <set>
#include <map>
#include <string>
 
#include "eckit/io/Length.h"
#include "eckit/io/Offset.h"
 
#include "odc/api/ColumnType.h"
 
namespace odc {
namespace core {
 
//----------------------------------------------------------------------------------------------------------------------
 
// Describe the data extent, and the keys, spanned by an ODB
 
class Span {
 
public: // methods
 
    Span(eckit::Offset start, eckit::Length length);
    ~Span();
 
    eckit::Offset offset() const { return start_; }
    eckit::Length length() const { return length_; }
 
    void extend(const Span& other);
    void extend(eckit::Length length);
 
    // Add the values _as_a_double_. Not nice, but compatible with old decoding api
    void addValue(const std::string& column, api::ColumnType t, double val);
 
    void addValues(const std::string& column, const std::set<long>& vals);
    void addValues(const std::string& column, const std::set<double>& vals);
    void addValues(const std::string& column, const std::set<std::string>& vals);
 
    template <typename T>
    void visit(T& visitor) {
        for (const auto& kv : integerValues_) visitor(kv.first, kv.second);
        for (const auto& kv : realValues_) visitor(kv.first, kv.second);
        for (const auto& kv : stringValues_) visitor(kv.first, kv.second);
    }
 
private: // members
 
    eckit::Offset start_;
    eckit::Length length_;
 
    std::map<std::string, std::set<long>> integerValues_;
    std::map<std::string, std::set<double>> realValues_;
    std::map<std::string, std::set<std::string>> stringValues_;
};
 
//----------------------------------------------------------------------------------------------------------------------
 
} // namespace core
} // namespace odc
 
#endif