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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 "resultvector.h"
#include "integerresultnode.h"
#include "floatresultnode.h"
#include "stringresultnode.h"
namespace search::expression {
class RangeBucketPreDefFunctionNode : public UnaryFunctionNode
{
private:
void onPrepareResult() override;
bool onExecute() const override;
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
class Handler {
public:
Handler(const RangeBucketPreDefFunctionNode & rangeNode) : _predef(rangeNode.getBucketList()), _nullResult(rangeNode._nullResult) { }
virtual ~Handler() { }
virtual const ResultNode * handle(const ResultNode & arg) = 0;
protected:
const ResultNodeVector & _predef;
const ResultNode * _nullResult;
};
class SingleValueHandler : public Handler {
public:
SingleValueHandler(const RangeBucketPreDefFunctionNode & rangeNode) :
Handler(rangeNode)
{ }
const ResultNode * handle(const ResultNode & arg) override;
};
class MultiValueHandler : public Handler {
public:
MultiValueHandler(const RangeBucketPreDefFunctionNode & rangeNode) :
Handler(rangeNode),
_result(static_cast<ResultNodeVector &>(rangeNode.updateResult()))
{ }
const ResultNode * handle(const ResultNode & arg) override;
private:
ResultNodeVector & _result;
};
ResultNodeVector::CP _predef;
mutable const ResultNode * _result;
const ResultNode * _nullResult;
std::unique_ptr<Handler> _handler;
static IntegerBucketResultNode _nullIntegerResult;
static FloatBucketResultNode _nullFloatResult;
static StringBucketResultNode _nullStringResult;
static RawBucketResultNode _nullRawResult;
public:
DECLARE_EXPRESSIONNODE(RangeBucketPreDefFunctionNode);
DECLARE_NBO_SERIALIZE;
RangeBucketPreDefFunctionNode() : UnaryFunctionNode(), _predef(), _result(nullptr), _nullResult(nullptr) {}
RangeBucketPreDefFunctionNode(ExpressionNode::UP arg) : UnaryFunctionNode(std::move(arg)), _predef(), _result(nullptr), _nullResult(nullptr) {}
RangeBucketPreDefFunctionNode(const RangeBucketPreDefFunctionNode & rhs);
RangeBucketPreDefFunctionNode & operator = (const RangeBucketPreDefFunctionNode & rhs);
~RangeBucketPreDefFunctionNode();
const ResultNode * getResult() const override { return _result; }
const ResultNodeVector & getBucketList() const { return *_predef; }
ResultNodeVector & getBucketList() { return *_predef; }
RangeBucketPreDefFunctionNode & setBucketList(const ResultNodeVector & predef) {
_predef.reset(static_cast<ResultNodeVector *>(predef.clone()));
return *this;
}
};
}
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