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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "expressionnode.h"
#include "serializer.h"
#include <vespa/vespalib/util/buffer.h>
namespace search::expression {
class BucketResultNode;
#define DECLARE_ABSTRACT_RESULTNODE(Class) DECLARE_IDENTIFIABLE_ABSTRACT_NS2(search, expression, Class)
#define DECLARE_ABSTRACT_RESULTNODE_NS1(ns, Class) DECLARE_IDENTIFIABLE_ABSTRACT_NS3(search, expression, ns, Class)
#define DECLARE_RESULTNODE(Class) \
DECLARE_IDENTIFIABLE_NS2(search, expression, Class) \
Class * clone() const override;
#define DECLARE_RESULTNODE_NS1(ns, Class) \
DECLARE_IDENTIFIABLE_NS3(search, expression, ns, Class) \
virtual Class * clone() const override;
#define DECLARE_RESULTNODE_SERIALIZE \
ResultSerializer & onSerializeResult(ResultSerializer & os) const override; \
ResultDeserializer & onDeserializeResult(ResultDeserializer & is) override;
#define IMPLEMENT_ABSTRACT_RESULTNODE(Class, base) IMPLEMENT_IDENTIFIABLE_ABSTRACT_NS2(search, expression, Class, base)
#define IMPLEMENT_RESULTNODE(Class, base) \
IMPLEMENT_IDENTIFIABLE_NS2(search, expression, Class, base) \
Class * Class::clone() const { return new Class(*this); }
class ResultNode : public vespalib::Identifiable
{
public:
using BufferRef = vespalib::BufferRef;
using ConstBufferRef = vespalib::ConstBufferRef;
public:
int64_t getInteger() const { return onGetInteger(0); }
int64_t getEnum() const { return onGetEnum(0); }
double getFloat() const { return onGetFloat(0); }
ConstBufferRef getString(BufferRef buf) const { return onGetString(0, buf); }
int64_t getInteger(size_t index) const { return onGetInteger(index); }
double getFloat(size_t index) const { return onGetFloat(index); }
ConstBufferRef getString(size_t index, BufferRef buf) const { return onGetString(index, buf); }
private:
virtual int64_t onGetInteger(size_t index) const = 0;
virtual int64_t onGetEnum(size_t index) const;
virtual double onGetFloat(size_t index) const = 0;
virtual ConstBufferRef onGetString(size_t index, BufferRef buf) const = 0;
public:
DECLARE_ABSTRACT_RESULTNODE(ResultNode);
using UP = std::unique_ptr<ResultNode>;
using CP = vespalib::IdentifiablePtr<ResultNode>;
virtual void set(const ResultNode & rhs) = 0;
/**
* Will initialize a memory area that must be destroyed. After creation it can be encoded or decoded.
* Memory must be fixed size.
* This interface is used to efficiently store data in vectors without the overhead of virtual objects.
* @param memory area to initialize
*/
virtual void create(void * buf) const;
/**
* Will initialize itself with the memory area supplied.
* @param memory area containing alrady encoded data.
*/
virtual void decode(const void * buf);
/**
* Will decode itself into the memory area supplied.
* @param memory area used as storage.
*/
virtual void encode(void * buf) const;
/**
* Will return a radixsortable value that will sort ascending.
* @param memory area used as storage.
*/
virtual uint64_t radixAsc(const void * buf) const;
/**
* Will return a radixsortable value that will sort descending.
* @param memory area used as storage.
*/
virtual uint64_t radixDesc(const void * buf) const;
/**
* Will return the typed hash of memory area supplied.
* @param memory area used as storage.
*/
virtual size_t hash(const void * buf) const;
/**
* Will decode itself into the memory area supplied.
* It will also encode itself from the memory area.
* @param memory area used as storage.
*/
virtual void swap(void * buf);
/**
* Will destroy any initialized memory.
* @param memory area used as storage.
*/
virtual void destroy(void * buf) const;
/**
* Will do a typed compare of the given memory a and b.
* @param a memory area of a
* @param b memory area of b
* @return -1 if a<b, 0 if a==b, and 1 if a>b
*/
virtual int cmpMem(const void * a, const void *b) const;
virtual void negate();
virtual void sort();
virtual void reverse();
virtual size_t hash() const = 0;
virtual ResultNode * clone() const = 0;
ResultNode::UP createBaseType() const { return ResultNode::UP(static_cast<ResultNode *>(getBaseClass().create())); }
virtual ResultSerializer & onSerializeResult(ResultSerializer & os) const;
virtual ResultDeserializer & onDeserializeResult(ResultDeserializer & is);
virtual size_t getRawByteSize() const;
virtual bool isMultiValue() const { return false; }
virtual const BucketResultNode& getNullBucket() const;
};
}
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