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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "btreenode.h"
#include "btreenodeallocator.h"
#include "btreetraits.h"
#include "noaggrcalc.h"
namespace vespalib::btree {
template <typename KeyT,
typename DataT,
typename AggrT = NoAggregated,
size_t INTERNAL_SLOTS = BTreeDefaultTraits::INTERNAL_SLOTS,
size_t LEAF_SLOTS = BTreeDefaultTraits::LEAF_SLOTS,
class AggrCalcT = NoAggrCalc>
class BTreeAggregator
{
public:
using NodeAllocatorType = BTreeNodeAllocator<KeyT, DataT, AggrT, INTERNAL_SLOTS, LEAF_SLOTS>;
using InternalNodeType = BTreeInternalNode<KeyT, AggrT, INTERNAL_SLOTS>;
using LeafNodeType = BTreeLeafNode<KeyT, DataT, AggrT, LEAF_SLOTS>;
using AggregatedType = AggrT;
static AggrT aggregate(const LeafNodeType &node, AggrCalcT aggrCalc);
static AggrT aggregate(const InternalNodeType &node, const NodeAllocatorType &allocator, AggrCalcT aggrCalc);
static void recalc(LeafNodeType &node, const AggrCalcT &aggrCalc);
static void recalc(LeafNodeType &node, const NodeAllocatorType &, const AggrCalcT &aggrCalc) {
recalc(node, aggrCalc);
}
static void recalc(InternalNodeType &node, const NodeAllocatorType &allocator, const AggrCalcT &aggrCalc);
static AggregatedType recalc(LeafNodeType &node, LeafNodeType &splitNode, const AggrCalcT &aggrCalc);
static AggregatedType recalc(InternalNodeType &node, InternalNodeType &splitNode,
const NodeAllocatorType &allocator, const AggrCalcT &aggrCalc);
};
}
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