UpdateSet.h

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#pragma once
#include "RdbTypedColumnContainer.h"
#include "catapult/deltaset/DeltaElements.h"
 
namespace catapult { namespace cache {
 
    template<typename TKeyTraits, typename TDescriptor, typename TContainer, typename TMemorySet>
    void UpdateSet(RdbTypedColumnContainer<TDescriptor, TContainer>& elements, const deltaset::DeltaElements<TMemorySet>& deltas) {
        auto size = elements.size();
        if (!deltas.HasChanges())
            return;
 
        for (const auto& added : deltas.Added)
            elements.insert(added);
 
        for (const auto& element : deltas.Copied)
            elements.insert(element);
 
        for (const auto& element : deltas.Removed)
            elements.remove(TKeyTraits::ToKey(element));
 
        size += deltas.Added.size();
        size -= deltas.Removed.size();
        elements.setSize(size);
    }
 
    template<typename TDescriptor, typename TContainer, typename TPruningBoundary>
    void PruneBaseSet(RdbTypedColumnContainer<TDescriptor, TContainer>& elements, const TPruningBoundary& pruningBoundary) {
        auto size = elements.size();
        size -= elements.prune(pruningBoundary.value());
        elements.setSize(size);
    }
}}