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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 <string>
namespace vespalib::xml {
class XmlOutputStream;
/**
* @class document::XmlSerializable
*
* Base class for classes that can be converted into XML.
*/
class XmlSerializable
{
public:
XmlSerializable() {}
virtual ~XmlSerializable() = default;
virtual void printXml(XmlOutputStream& out) const = 0;
/** Utility function, using printXml() to create a string. */
virtual std::string toXml(const std::string& indent = "") const;
};
}
namespace vespalib {
// The XmlSerializable and XmlOutputStream is often used in header files
// and is thus available in the vespalib namespace. To not pollute the
// vespalib namespace with all the other classes, use
// "using namespace vespalib::xml" within your printXml functions
using XmlSerializable = vespalib::xml::XmlSerializable;
using XmlOutputStream = vespalib::xml::XmlOutputStream;
} // vespalib
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