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// BSD 3-Clause License; see https://github.com/scikit-hep/awkward/blob/main/LICENSE
#ifndef AWKWARD_LISTBUILDER_H_
#define AWKWARD_LISTBUILDER_H_
#include <vector>
#include "awkward/common.h"
#include "awkward/BuilderOptions.h"
#include "awkward/GrowableBuffer.h"
#include "awkward/builder/Builder.h"
namespace awkward {
/// @class ListBuilder
///
/// @brief Builder node that accumulates lists.
class EXPORT_SYMBOL ListBuilder: public Builder {
public:
/// @brief Create an empty ListBuilder.
/// @param options Configuration options for building an array;
/// these are passed to every Builder's constructor.
static const BuilderPtr
fromempty(const BuilderOptions& options);
/// @brief Create a ListBuilder from a full set of parameters.
///
/// @param options Configuration options for building an array;
/// these are passed to every Builder's constructor.
/// @param offsets Contains the accumulated offsets (like
/// {@link ListOffsetArrayOf#offsets ListOffsetArray::offsets}).
/// @param content Builder for the data in the nested lists.
/// @param begun If `true`, the ListBuilder is in a state after
/// #beginlist and before #endlist and is #active; if `false`,
/// it is not.
ListBuilder(const BuilderOptions& options,
GrowableBuffer<int64_t> offsets,
const BuilderPtr& content,
bool begun);
/// @brief User-friendly name of this class: `"ListBuilder"`.
const std::string
classname() const override;
const std::string
to_buffers(BuffersContainer& container, int64_t& form_key_id) const override;
int64_t
length() const override;
void
clear() override;
/// @copydoc Builder::active()
///
/// Calling #beginlist makes a ListBuilder active; #endlist makes it
/// inactive.
bool
active() const override;
const BuilderPtr
null() override;
const BuilderPtr
boolean(bool x) override;
const BuilderPtr
integer(int64_t x) override;
const BuilderPtr
real(double x) override;
const BuilderPtr
complex(std::complex<double> x) override;
const BuilderPtr
datetime(int64_t x, const std::string& unit) override;
const BuilderPtr
timedelta(int64_t x, const std::string& unit) override;
const BuilderPtr
string(const char* x, int64_t length, const char* encoding) override;
const BuilderPtr
beginlist() override;
const BuilderPtr
endlist() override;
const BuilderPtr
begintuple(int64_t numfields) override;
const BuilderPtr
index(int64_t index) override;
const BuilderPtr
endtuple() override;
const BuilderPtr
beginrecord(const char* name, bool check) override;
void
field(const char* key, bool check) override;
const BuilderPtr
endrecord() override;
const BuilderOptions&
options() const { return options_; }
const GrowableBuffer<int64_t>& buffer() const { return offsets_; }
const BuilderPtr builder() const { return content_; }
bool begun() { return begun_; }
void
maybeupdate(const BuilderPtr builder);
private:
const BuilderOptions options_;
GrowableBuffer<int64_t> offsets_;
BuilderPtr content_;
bool begun_;
};
}
#endif // AWKWARD_LISTBUILDER_H_
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