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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 "objectvisitor.h"
namespace vespalib {
/**
* This is a concrete object visitor that will build up a structured
* human-readable string representation of an object.
**/
class ObjectDumper : public ObjectVisitor
{
private:
vespalib::string _str;
int _indent;
int _currIndent;
/**
* Add a number of spaces equal to the current indent to the
* string we are building.
**/
void addIndent();
/**
* Add a complete line of output. Appropriate indentation will be
* added before the given string and a newline will be added after
* it.
*
* @param line the line we want to add
**/
void addLine(const vespalib::string &line);
/**
* Open a subscope by increasing the current indent level
**/
void openScope();
/**
* Close a subscope by decreasing the current indent level
**/
void closeScope();
public:
/**
* Create an object dumper with the given indent size; default is
* 4 spaces per indent level.
*
* @param indent indent size in number of spaces
**/
ObjectDumper(int indent = 4);
~ObjectDumper();
/**
* Obtain the created object string representation. This object
* should be invoked after the complete object structure has been
* visited.
*
* @return object string representation
**/
vespalib::string toString() const { return _str; }
void openStruct(const vespalib::string &name, const vespalib::string &type) override;
void closeStruct() override;
void visitBool(const vespalib::string &name, bool value) override;
void visitInt(const vespalib::string &name, int64_t value) override;
void visitFloat(const vespalib::string &name, double value) override;
void visitString(const vespalib::string &name, const vespalib::string &value) override;
void visitNull(const vespalib::string &name) override;
void visitNotImplemented() override;
};
} // namespace vespalib
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