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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 "unaryfunctionnode.h"
#include "numericresultnode.h"
#include "integerbucketresultnode.h"
#include "floatbucketresultnode.h"
#include <memory>
namespace search::expression {
class FixedWidthBucketFunctionNode : public UnaryFunctionNode
{
public:
// update result bucket based on numeric value
struct BucketHandler {
using CP = vespalib::CloneablePtr<BucketHandler>;
virtual void update(ResultNode &result, const ResultNode &value) const = 0;
virtual BucketHandler *clone() const = 0;
virtual ~BucketHandler() = default;
};
// update integer result bucket based on integer value
struct IntegerBucketHandler : public BucketHandler {
int64_t width;
IntegerBucketHandler(int64_t w) : width(w) {}
void update(ResultNode &result, const ResultNode &value) const override;
IntegerBucketHandler *clone() const override { return new IntegerBucketHandler(*this); }
};
struct IntegerVectorBucketHandler : public IntegerBucketHandler {
IntegerVectorBucketHandler(int64_t w) : IntegerBucketHandler(w) { }
void update(ResultNode &result, const ResultNode &value) const override;
IntegerVectorBucketHandler *clone() const override { return new IntegerVectorBucketHandler(*this); }
};
// update float result bucket based on float value
struct FloatBucketHandler : public BucketHandler {
double width;
FloatBucketHandler(double w) : width(w) {}
void update(ResultNode &result, const ResultNode &value) const override;
FloatBucketHandler *clone() const override { return new FloatBucketHandler(*this); }
};
struct FloatVectorBucketHandler : public FloatBucketHandler {
FloatVectorBucketHandler(double w) : FloatBucketHandler(w) { }
void update(ResultNode &result, const ResultNode &value) const override;
FloatVectorBucketHandler *clone() const override { return new FloatVectorBucketHandler(*this); }
};
private:
void onPrepareResult() override;
bool onExecute() const override;
NumericResultNode::CP _width;
BucketHandler::CP _bucketHandler;
public:
DECLARE_EXPRESSIONNODE(FixedWidthBucketFunctionNode);
DECLARE_NBO_SERIALIZE;
FixedWidthBucketFunctionNode() : UnaryFunctionNode(), _width(), _bucketHandler() {}
FixedWidthBucketFunctionNode(ExpressionNode::UP arg) : UnaryFunctionNode(std::move(arg)), _width(), _bucketHandler() {}
~FixedWidthBucketFunctionNode() override;
FixedWidthBucketFunctionNode &setWidth(const NumericResultNode::CP &width) {
_width = width;
return *this;
}
};
}
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