PageHeaderCache.h

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#ifndef PAGEHEADERCACHE_H_
#define PAGEHEADERCACHE_H_

#include <map>
#include <vector>

#include <plotms/PlotMS/PlotMSPageHeaderParam.h>
#include <casacore/casa/BasicSL/String.h>

namespace casa {

using std::vector;
using std::map;

class HeaderItemData {
public:
        using HeaderItem = PageHeaderItemsDef::Item;
        HeaderItemData(HeaderItem item,const String & value)
                : item_(item), value_(value) {}
        HeaderItem item() const { return item_ ; }
        const String& value() const { return value_ ; }
        void setValue(const String& value) { value_ = value ; }
private:
        HeaderItem item_;
        String value_;
};

class PageHeaderCache {
private:
        static const String& emptyString() { static const String empty_ {""};  return empty_; }
public:
        using HeaderItem = PageHeaderItemsDef::Item;
        PageHeaderCache() {}
        void store(HeaderItemData data);
        void clear();
        const String& value(HeaderItem header_item) const {
                const auto it = itemIndex_.find(header_item);
                if ( it == itemIndex_.end() ) return emptyString();
                return values_[it->second].value();  }
        const std::vector<HeaderItemData>& values() const { return values_ ; }
        String toString() const ;

private:
        map<HeaderItem,uInt> itemIndex_;
        std::vector<HeaderItemData> values_;

};

ostream& operator<<(ostream &os, const PageHeaderCache&  cache);

}

#endif