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#ifndef DataFormats_Common_IndirectVectorHolder_h
#define DataFormats_Common_IndirectVectorHolder_h
#include "DataFormats/Common/interface/CMS_CLASS_VERSION.h"
#include "DataFormats/Common/interface/BaseVectorHolder.h"
#include "DataFormats/Common/interface/RefVectorHolderBase.h"
#include "DataFormats/Common/interface/IndirectHolder.h"
#include <memory>
namespace edm {
namespace reftobase {
template <typename T>
class IndirectVectorHolder : public BaseVectorHolder<T> {
public:
typedef BaseVectorHolder<T> base_type;
typedef typename base_type::size_type size_type;
typedef typename base_type::element_type element_type;
typedef typename base_type::base_ref_type base_ref_type;
typedef typename base_type::const_iterator const_iterator;
IndirectVectorHolder();
IndirectVectorHolder(const IndirectVectorHolder& other);
IndirectVectorHolder(std::shared_ptr<RefVectorHolderBase> p);
IndirectVectorHolder(RefVectorHolderBase* p);
~IndirectVectorHolder() override;
IndirectVectorHolder& operator=(IndirectVectorHolder const& rhs);
void swap(IndirectVectorHolder& other);
BaseVectorHolder<T>* clone() const override;
BaseVectorHolder<T>* cloneEmpty() const override;
ProductID id() const override;
EDProductGetter const* productGetter() const override;
bool empty() const override;
size_type size() const override;
void clear() override;
base_ref_type const at(size_type idx) const override;
std::unique_ptr<reftobase::RefVectorHolderBase> vectorHolder() const override {
return std::unique_ptr<reftobase::RefVectorHolderBase>(helper_->clone());
}
void push_back(const BaseHolder<T>* r) override {
typedef IndirectHolder<T> holder_type;
const holder_type* h = dynamic_cast<const holder_type*>(r);
if (h == nullptr)
Exception::throwThis(errors::InvalidReference,
"In IndirectHolder<T> trying to push_back wrong reference type");
helper_->push_back(h->helper_);
}
/// Checks if product collection is in memory or available
/// in the Event. No type checking is done.
bool isAvailable() const override { return helper_->isAvailable(); }
//Used by ROOT storage
CMS_CLASS_VERSION(10)
private:
typedef typename base_type::const_iterator_imp const_iterator_imp;
RefVectorHolderBase* helper_;
public:
struct const_iterator_imp_specific : public const_iterator_imp {
typedef ptrdiff_t difference_type;
const_iterator_imp_specific() {}
explicit const_iterator_imp_specific(const typename RefVectorHolderBase::const_iterator& it) : i(it) {}
~const_iterator_imp_specific() override {}
const_iterator_imp_specific* clone() const override { return new const_iterator_imp_specific(i); }
void increase() override { ++i; }
void decrease() override { --i; }
void increase(difference_type d) override { i += d; }
void decrease(difference_type d) override { i -= d; }
bool equal_to(const const_iterator_imp* o) const override { return i == dc(o); }
bool less_than(const const_iterator_imp* o) const override { return i < dc(o); }
void assign(const const_iterator_imp* o) override { i = dc(o); }
base_ref_type deref() const override { return base_ref_type(*i); }
difference_type difference(const const_iterator_imp* o) const override { return i - dc(o); }
private:
const typename RefVectorHolderBase::const_iterator& dc(const const_iterator_imp* o) const {
if (o == nullptr) {
Exception::throwThis(edm::errors::InvalidReference,
"In IndirectVectorHolder trying to dereference a null pointer");
}
const const_iterator_imp_specific* oo = dynamic_cast<const const_iterator_imp_specific*>(o);
if (oo == nullptr) {
Exception::throwThis(errors::InvalidReference,
"In IndirectVectorHolder trying to cast iterator to wrong type ");
}
return oo->i;
}
typename RefVectorHolderBase::const_iterator i;
};
const_iterator begin() const override {
return const_iterator(new const_iterator_imp_specific(helper_->begin()));
}
const_iterator end() const override { return const_iterator(new const_iterator_imp_specific(helper_->end())); }
};
template <typename T>
IndirectVectorHolder<T>::IndirectVectorHolder() : BaseVectorHolder<T>(), helper_(nullptr) {}
template <typename T>
IndirectVectorHolder<T>::IndirectVectorHolder(std::shared_ptr<RefVectorHolderBase> p)
: BaseVectorHolder<T>(), helper_(p->clone()) {}
template <typename T>
IndirectVectorHolder<T>::IndirectVectorHolder(RefVectorHolderBase* p) : BaseVectorHolder<T>(), helper_(p) {}
template <typename T>
IndirectVectorHolder<T>::IndirectVectorHolder(const IndirectVectorHolder& other)
: BaseVectorHolder<T>(), helper_(other.helper_->clone()) {}
template <typename T>
IndirectVectorHolder<T>::~IndirectVectorHolder() {
delete helper_;
}
template <typename T>
inline void IndirectVectorHolder<T>::swap(IndirectVectorHolder& other) {
this->BaseVectorHolder<T>::swap(other);
std::swap(helper_, other.helper_);
}
template <typename T>
inline IndirectVectorHolder<T>& IndirectVectorHolder<T>::operator=(IndirectVectorHolder const& rhs) {
IndirectVectorHolder temp(rhs);
swap(temp);
return *this;
}
template <typename T>
BaseVectorHolder<T>* IndirectVectorHolder<T>::clone() const {
return new IndirectVectorHolder<T>(*this);
}
template <typename T>
BaseVectorHolder<T>* IndirectVectorHolder<T>::cloneEmpty() const {
return new IndirectVectorHolder<T>(helper_->cloneEmpty());
}
template <typename T>
ProductID IndirectVectorHolder<T>::id() const {
return helper_->id();
}
template <typename T>
EDProductGetter const* IndirectVectorHolder<T>::productGetter() const {
return helper_->productGetter();
}
template <typename T>
bool IndirectVectorHolder<T>::empty() const {
return helper_->empty();
}
template <typename T>
typename IndirectVectorHolder<T>::size_type IndirectVectorHolder<T>::size() const {
return helper_->size();
}
template <typename T>
void IndirectVectorHolder<T>::clear() {
return helper_->clear();
}
template <typename T>
typename IndirectVectorHolder<T>::base_ref_type const IndirectVectorHolder<T>::at(size_type idx) const {
return helper_ ? helper_->template getRef<T>(idx) : typename IndirectVectorHolder<T>::base_ref_type();
}
// Free swap function
template <typename T>
inline void swap(IndirectVectorHolder<T>& lhs, IndirectVectorHolder<T>& rhs) {
lhs.swap(rhs);
}
} // namespace reftobase
} // namespace edm
#endif
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